/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-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 18:58:47,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 18:58:47,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 18:58:47,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 18:58:47,675 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 [2022-03-03 18:58:47,694 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 18:58:47,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 18:58:47,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 18:58:47,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 18:58:47,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 18:58:47,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 18:58:47,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 18:58:47,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 18:58:47,701 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 18:58:47,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 18:58:47,702 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 18:58:47,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 18:58:47,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 18:58:47,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 18:58:47,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 18:58:47,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 18:58:47,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 18:58:47,702 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 18:58:47,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 18:58:47,703 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 18:58:47,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 18:58:47,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 18:58:47,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 18:58:47,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 18:58:47,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 18:58:47,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 18:58:47,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 18:58:47,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 18:58:47,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 18:58:47,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 18:58:47,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 18:58:47,705 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 18:58:47,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 18:58:47,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 18:58:47,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 18:58:47,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 18:58:47,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 18:58:47,885 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 18:58:47,896 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 18:58:47,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2022-03-03 18:58:47,897 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2022-03-03 18:58:47,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 18:58:47,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 18:58:47,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 18:58:47,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 18:58:47,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 18:58:47,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,933 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 18:58:47,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 18:58:47,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 18:58:47,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 18:58:47,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 18:58:47,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 18:58:47,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 18:58:47,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 18:58:47,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 18:58:47,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/1) ... [2022-03-03 18:58:47,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 18:58:47,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:58:47,979 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) [2022-03-03 18:58:47,982 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 [2022-03-03 18:58:48,006 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 18:58:48,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 18:58:48,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 18:58:48,007 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 18:58:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 18:58:48,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 18:58:48,007 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 18:58:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 18:58:48,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 18:58:48,007 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 18:58:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 18:58:48,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 18:58:48,008 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 18:58:48,049 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 18:58:48,050 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 18:58:48,141 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 18:58:48,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 18:58:48,187 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-03 18:58:48,189 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 06:58:48 BoogieIcfgContainer [2022-03-03 18:58:48,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 18:58:48,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 18:58:48,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 18:58:48,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 18:58:48,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:58:47" (1/2) ... [2022-03-03 18:58:48,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f252b1 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 06:58:48, skipping insertion in model container [2022-03-03 18:58:48,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 06:58:48" (2/2) ... [2022-03-03 18:58:48,209 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2022-03-03 18:58:48,212 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 18:58:48,212 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 18:58:48,213 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 18:58:48,213 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 18:58:48,256 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 18:58:48,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 18:58:48,286 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 [2022-03-03 18:58:48,286 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 18:58:48,292 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-03-03 18:58:48,329 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:58:48,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:48,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:48,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:48,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash 322758138, now seen corresponding path program 1 times [2022-03-03 18:58:48,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:48,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979804301] [2022-03-03 18:58:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:48,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:48,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:48,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979804301] [2022-03-03 18:58:48,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979804301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:48,542 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:48,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 18:58:48,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215799159] [2022-03-03 18:58:48,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:48,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 18:58:48,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:48,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 18:58:48,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 18:58:48,584 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 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 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:48,672 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2022-03-03 18:58:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 18:58:48,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:48,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:48,688 INFO L225 Difference]: With dead ends: 248 [2022-03-03 18:58:48,688 INFO L226 Difference]: Without dead ends: 248 [2022-03-03 18:58:48,689 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 [2022-03-03 18:58:48,693 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:48,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:58:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-03 18:58:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2022-03-03 18:58:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2022-03-03 18:58:48,778 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2022-03-03 18:58:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:48,782 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2022-03-03 18:58:48,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2022-03-03 18:58:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:58:48,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:48,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:48,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 18:58:48,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:48,790 INFO L85 PathProgramCache]: Analyzing trace with hash -515592662, now seen corresponding path program 2 times [2022-03-03 18:58:48,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:48,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288194842] [2022-03-03 18:58:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:48,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:48,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:48,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288194842] [2022-03-03 18:58:48,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288194842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:48,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:48,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 18:58:48,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484935627] [2022-03-03 18:58:48,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:48,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 18:58:48,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 18:58:48,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 18:58:48,870 INFO L87 Difference]: Start difference. First operand 129 states and 379 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:48,938 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2022-03-03 18:58:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 18:58:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:48,940 INFO L225 Difference]: With dead ends: 206 [2022-03-03 18:58:48,940 INFO L226 Difference]: Without dead ends: 183 [2022-03-03 18:58:48,940 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 [2022-03-03 18:58:48,941 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:48,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:58:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-03 18:58:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2022-03-03 18:58:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-03-03 18:58:48,949 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-03-03 18:58:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:48,949 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-03-03 18:58:48,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-03-03 18:58:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:58:48,950 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:48,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:48,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 18:58:48,950 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:48,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1307213656, now seen corresponding path program 3 times [2022-03-03 18:58:48,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:48,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932526731] [2022-03-03 18:58:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:48,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:48,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:48,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932526731] [2022-03-03 18:58:48,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932526731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:48,990 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:48,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 18:58:48,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117916477] [2022-03-03 18:58:48,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:48,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 18:58:48,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 18:58:48,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 18:58:48,999 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:49,064 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2022-03-03 18:58:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 18:58:49,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:49,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:49,066 INFO L225 Difference]: With dead ends: 141 [2022-03-03 18:58:49,066 INFO L226 Difference]: Without dead ends: 141 [2022-03-03 18:58:49,067 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 [2022-03-03 18:58:49,070 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:49,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-03 18:58:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2022-03-03 18:58:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-03-03 18:58:49,076 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-03-03 18:58:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:49,077 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-03-03 18:58:49,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-03-03 18:58:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:58:49,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:49,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:49,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 18:58:49,078 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1230707719, now seen corresponding path program 1 times [2022-03-03 18:58:49,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:49,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842039093] [2022-03-03 18:58:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:49,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:49,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:49,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842039093] [2022-03-03 18:58:49,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842039093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:49,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:49,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-03 18:58:49,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416327114] [2022-03-03 18:58:49,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:49,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 18:58:49,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 18:58:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:49,174 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:49,248 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2022-03-03 18:58:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 18:58:49,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:49,250 INFO L225 Difference]: With dead ends: 265 [2022-03-03 18:58:49,250 INFO L226 Difference]: Without dead ends: 238 [2022-03-03 18:58:49,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:58:49,251 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:49,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 22 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:58:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-03-03 18:58:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2022-03-03 18:58:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2022-03-03 18:58:49,272 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2022-03-03 18:58:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:49,272 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2022-03-03 18:58:49,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,273 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2022-03-03 18:58:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:58:49,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:49,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:49,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 18:58:49,274 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:49,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1661741005, now seen corresponding path program 2 times [2022-03-03 18:58:49,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:49,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627478757] [2022-03-03 18:58:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:49,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:58:49,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:49,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627478757] [2022-03-03 18:58:49,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627478757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:49,402 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:49,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-03 18:58:49,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277594338] [2022-03-03 18:58:49,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:49,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 18:58:49,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 18:58:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:49,403 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:49,539 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2022-03-03 18:58:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:49,541 INFO L225 Difference]: With dead ends: 372 [2022-03-03 18:58:49,541 INFO L226 Difference]: Without dead ends: 345 [2022-03-03 18:58:49,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:58:49,542 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:49,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 38 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:58:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-03 18:58:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2022-03-03 18:58:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2022-03-03 18:58:49,551 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2022-03-03 18:58:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:49,551 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2022-03-03 18:58:49,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2022-03-03 18:58:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:58:49,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:49,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:49,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 18:58:49,553 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:49,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:49,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1646280209, now seen corresponding path program 3 times [2022-03-03 18:58:49,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:49,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074291167] [2022-03-03 18:58:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:49,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:58:49,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:49,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074291167] [2022-03-03 18:58:49,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074291167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:49,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:49,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-03 18:58:49,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399858234] [2022-03-03 18:58:49,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:49,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 18:58:49,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:49,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 18:58:49,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:49,627 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:49,782 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2022-03-03 18:58:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:49,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:49,784 INFO L225 Difference]: With dead ends: 372 [2022-03-03 18:58:49,784 INFO L226 Difference]: Without dead ends: 332 [2022-03-03 18:58:49,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:58:49,785 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:49,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:58:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-03 18:58:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2022-03-03 18:58:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2022-03-03 18:58:49,791 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2022-03-03 18:58:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:49,791 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2022-03-03 18:58:49,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2022-03-03 18:58:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:58:49,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:49,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:49,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-03 18:58:49,792 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash 414579593, now seen corresponding path program 4 times [2022-03-03 18:58:49,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:49,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577804262] [2022-03-03 18:58:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:49,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:58:49,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:49,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577804262] [2022-03-03 18:58:49,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577804262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:49,852 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:49,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-03 18:58:49,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401143401] [2022-03-03 18:58:49,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:49,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 18:58:49,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 18:58:49,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:49,853 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:49,938 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2022-03-03 18:58:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:49,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:49,939 INFO L225 Difference]: With dead ends: 318 [2022-03-03 18:58:49,939 INFO L226 Difference]: Without dead ends: 255 [2022-03-03 18:58:49,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:58:49,940 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:49,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:58:49,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-03 18:58:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2022-03-03 18:58:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2022-03-03 18:58:49,945 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2022-03-03 18:58:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:49,946 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2022-03-03 18:58:49,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2022-03-03 18:58:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:58:49,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:49,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:49,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-03 18:58:49,947 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1321939015, now seen corresponding path program 1 times [2022-03-03 18:58:49,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:49,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058233679] [2022-03-03 18:58:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:49,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:49,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:49,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058233679] [2022-03-03 18:58:49,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058233679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:49,983 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:49,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:58:49,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536802668] [2022-03-03 18:58:49,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:49,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:58:49,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:49,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:58:49,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:58:49,984 INFO L87 Difference]: Start difference. First operand 195 states and 573 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:50,031 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2022-03-03 18:58:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:50,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:50,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:50,033 INFO L225 Difference]: With dead ends: 285 [2022-03-03 18:58:50,033 INFO L226 Difference]: Without dead ends: 261 [2022-03-03 18:58:50,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:50,034 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:50,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-03 18:58:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2022-03-03 18:58:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2022-03-03 18:58:50,039 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2022-03-03 18:58:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:50,039 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2022-03-03 18:58:50,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2022-03-03 18:58:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:58:50,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:50,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:50,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-03 18:58:50,040 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash 170737749, now seen corresponding path program 1 times [2022-03-03 18:58:50,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:50,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298240334] [2022-03-03 18:58:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:50,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:50,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298240334] [2022-03-03 18:58:50,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298240334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:50,070 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:50,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:58:50,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619659659] [2022-03-03 18:58:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:50,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:58:50,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:58:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:58:50,071 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:50,121 INFO L93 Difference]: Finished difference Result 279 states and 816 transitions. [2022-03-03 18:58:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:50,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:50,122 INFO L225 Difference]: With dead ends: 279 [2022-03-03 18:58:50,122 INFO L226 Difference]: Without dead ends: 279 [2022-03-03 18:58:50,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:50,123 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:50,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 33 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-03 18:58:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2022-03-03 18:58:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2022-03-03 18:58:50,128 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2022-03-03 18:58:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:50,128 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2022-03-03 18:58:50,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2022-03-03 18:58:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:58:50,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:50,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:50,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-03 18:58:50,129 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1862125575, now seen corresponding path program 2 times [2022-03-03 18:58:50,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:50,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182133226] [2022-03-03 18:58:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:50,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:50,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182133226] [2022-03-03 18:58:50,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182133226] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:50,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:50,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:58:50,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450879526] [2022-03-03 18:58:50,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:50,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:58:50,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:58:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:58:50,159 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:50,218 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2022-03-03 18:58:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:50,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:50,220 INFO L225 Difference]: With dead ends: 333 [2022-03-03 18:58:50,220 INFO L226 Difference]: Without dead ends: 321 [2022-03-03 18:58:50,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:58:50,221 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:50,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 30 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-03 18:58:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2022-03-03 18:58:50,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2022-03-03 18:58:50,235 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2022-03-03 18:58:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:50,235 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2022-03-03 18:58:50,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2022-03-03 18:58:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:58:50,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:50,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:50,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-03 18:58:50,236 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1006568847, now seen corresponding path program 2 times [2022-03-03 18:58:50,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:50,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911230155] [2022-03-03 18:58:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:50,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:50,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911230155] [2022-03-03 18:58:50,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911230155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:50,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:50,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:58:50,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957634908] [2022-03-03 18:58:50,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:50,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:58:50,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:58:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:58:50,291 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:50,357 INFO L93 Difference]: Finished difference Result 297 states and 852 transitions. [2022-03-03 18:58:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:50,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:50,359 INFO L225 Difference]: With dead ends: 297 [2022-03-03 18:58:50,359 INFO L226 Difference]: Without dead ends: 297 [2022-03-03 18:58:50,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:58:50,360 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:50,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-03 18:58:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 201. [2022-03-03 18:58:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2022-03-03 18:58:50,365 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2022-03-03 18:58:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:50,365 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2022-03-03 18:58:50,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2022-03-03 18:58:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:58:50,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:50,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:50,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-03 18:58:50,367 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:50,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1593484449, now seen corresponding path program 3 times [2022-03-03 18:58:50,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:50,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433620210] [2022-03-03 18:58:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:50,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:50,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433620210] [2022-03-03 18:58:50,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433620210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:50,431 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:50,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:58:50,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748719828] [2022-03-03 18:58:50,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:50,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:58:50,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:58:50,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:58:50,432 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:50,476 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2022-03-03 18:58:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:50,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:50,478 INFO L225 Difference]: With dead ends: 219 [2022-03-03 18:58:50,478 INFO L226 Difference]: Without dead ends: 206 [2022-03-03 18:58:50,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:50,478 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:50,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-03 18:58:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2022-03-03 18:58:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9572192513368982) internal successors, (553), 187 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 553 transitions. [2022-03-03 18:58:50,483 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 553 transitions. Word has length 19 [2022-03-03 18:58:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:50,483 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 553 transitions. [2022-03-03 18:58:50,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 553 transitions. [2022-03-03 18:58:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:58:50,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:50,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:50,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-03 18:58:50,484 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash -353547893, now seen corresponding path program 3 times [2022-03-03 18:58:50,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:50,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298901736] [2022-03-03 18:58:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:50,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:50,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298901736] [2022-03-03 18:58:50,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298901736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:50,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:50,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:58:50,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929833530] [2022-03-03 18:58:50,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:50,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:58:50,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:58:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:58:50,515 INFO L87 Difference]: Start difference. First operand 188 states and 553 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:50,568 INFO L93 Difference]: Finished difference Result 267 states and 774 transitions. [2022-03-03 18:58:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:50,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:50,570 INFO L225 Difference]: With dead ends: 267 [2022-03-03 18:58:50,570 INFO L226 Difference]: Without dead ends: 267 [2022-03-03 18:58:50,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:50,570 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:50,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-03 18:58:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 189. [2022-03-03 18:58:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-03-03 18:58:50,575 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-03-03 18:58:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:50,575 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-03-03 18:58:50,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-03-03 18:58:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:58:50,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:50,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:50,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-03 18:58:50,576 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash 844809037, now seen corresponding path program 4 times [2022-03-03 18:58:50,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:50,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823039641] [2022-03-03 18:58:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:58:50,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:50,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823039641] [2022-03-03 18:58:50,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823039641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:50,610 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:50,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:58:50,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553213483] [2022-03-03 18:58:50,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:50,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:58:50,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:58:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:58:50,612 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:50,672 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2022-03-03 18:58:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:50,673 INFO L225 Difference]: With dead ends: 207 [2022-03-03 18:58:50,673 INFO L226 Difference]: Without dead ends: 195 [2022-03-03 18:58:50,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:58:50,674 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:50,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-03 18:58:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-03-03 18:58:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2022-03-03 18:58:50,678 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2022-03-03 18:58:50,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:50,678 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2022-03-03 18:58:50,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,678 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2022-03-03 18:58:50,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:58:50,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:50,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:50,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-03 18:58:50,679 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:50,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:50,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1370864431, now seen corresponding path program 5 times [2022-03-03 18:58:50,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:50,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134188118] [2022-03-03 18:58:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:58:50,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:50,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134188118] [2022-03-03 18:58:50,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134188118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:50,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:50,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:58:50,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890083666] [2022-03-03 18:58:50,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:50,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:58:50,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:58:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:58:50,719 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:50,778 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2022-03-03 18:58:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:50,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:50,779 INFO L225 Difference]: With dead ends: 214 [2022-03-03 18:58:50,779 INFO L226 Difference]: Without dead ends: 214 [2022-03-03 18:58:50,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:50,780 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:50,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-03 18:58:50,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2022-03-03 18:58:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-03-03 18:58:50,784 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-03-03 18:58:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:50,784 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-03-03 18:58:50,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-03-03 18:58:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:58:50,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:50,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:50,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-03 18:58:50,785 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash -297779051, now seen corresponding path program 6 times [2022-03-03 18:58:50,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:50,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307248532] [2022-03-03 18:58:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:58:50,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:50,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307248532] [2022-03-03 18:58:50,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307248532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:58:50,813 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:58:50,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:58:50,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678506037] [2022-03-03 18:58:50,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:58:50,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:58:50,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:58:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:58:50,814 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:50,866 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2022-03-03 18:58:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:58:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:58:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:50,867 INFO L225 Difference]: With dead ends: 208 [2022-03-03 18:58:50,867 INFO L226 Difference]: Without dead ends: 208 [2022-03-03 18:58:50,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:58:50,868 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:50,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:58:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-03 18:58:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2022-03-03 18:58:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-03-03 18:58:50,872 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-03-03 18:58:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:50,872 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-03-03 18:58:50,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-03-03 18:58:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:58:50,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:50,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:50,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-03 18:58:50,873 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1817075563, now seen corresponding path program 1 times [2022-03-03 18:58:50,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:50,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955239909] [2022-03-03 18:58:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 18:58:50,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:50,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955239909] [2022-03-03 18:58:50,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955239909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:58:50,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064970323] [2022-03-03 18:58:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:50,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:50,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:58:50,917 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) [2022-03-03 18:58:50,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 18:58:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:50,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:58:50,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:58:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 18:58:51,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:58:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 18:58:51,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064970323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:58:51,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:58:51,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-03 18:58:51,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221940279] [2022-03-03 18:58:51,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:58:51,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 18:58:51,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:51,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 18:58:51,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:58:51,281 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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) [2022-03-03 18:58:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:51,440 INFO L93 Difference]: Finished difference Result 561 states and 1635 transitions. [2022-03-03 18:58:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:58:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 20 [2022-03-03 18:58:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:51,441 INFO L225 Difference]: With dead ends: 561 [2022-03-03 18:58:51,441 INFO L226 Difference]: Without dead ends: 282 [2022-03-03 18:58:51,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:58:51,442 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:51,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 44 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:58:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-03 18:58:51,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-03-03 18:58:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9359430604982206) internal successors, (825), 281 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 825 transitions. [2022-03-03 18:58:51,462 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 825 transitions. Word has length 20 [2022-03-03 18:58:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:51,462 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 825 transitions. [2022-03-03 18:58:51,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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) [2022-03-03 18:58:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 825 transitions. [2022-03-03 18:58:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:58:51,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:51,463 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:51,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 18:58:51,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-03 18:58:51,679 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:51,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1806041876, now seen corresponding path program 2 times [2022-03-03 18:58:51,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:51,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530263368] [2022-03-03 18:58:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:51,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 18:58:51,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:51,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530263368] [2022-03-03 18:58:51,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530263368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:58:51,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281568615] [2022-03-03 18:58:51,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:58:51,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:51,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:58:51,746 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) [2022-03-03 18:58:51,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 18:58:51,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:58:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:58:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 18:58:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:58:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 18:58:51,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:58:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 18:58:52,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281568615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:58:52,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:58:52,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-03-03 18:58:52,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366666659] [2022-03-03 18:58:52,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:58:52,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 18:58:52,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 18:58:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:58:52,081 INFO L87 Difference]: Start difference. First operand 282 states and 825 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-03-03 18:58:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:52,257 INFO L93 Difference]: Finished difference Result 406 states and 1187 transitions. [2022-03-03 18:58:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:58:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 23 [2022-03-03 18:58:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:52,258 INFO L225 Difference]: With dead ends: 406 [2022-03-03 18:58:52,258 INFO L226 Difference]: Without dead ends: 313 [2022-03-03 18:58:52,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:58:52,259 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:52,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 52 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:58:52,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-03 18:58:52,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-03-03 18:58:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9391025641025643) internal successors, (917), 312 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 917 transitions. [2022-03-03 18:58:52,265 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 917 transitions. Word has length 23 [2022-03-03 18:58:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:52,265 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 917 transitions. [2022-03-03 18:58:52,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-03-03 18:58:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 917 transitions. [2022-03-03 18:58:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:58:52,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:52,266 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:52,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 18:58:52,479 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,SelfDestructingSolverStorable17 [2022-03-03 18:58:52,479 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash 140853163, now seen corresponding path program 3 times [2022-03-03 18:58:52,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:52,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930584844] [2022-03-03 18:58:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:52,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:52,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:52,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930584844] [2022-03-03 18:58:52,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930584844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:58:52,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700551357] [2022-03-03 18:58:52,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:58:52,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:52,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:58:52,670 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) [2022-03-03 18:58:52,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 18:58:52,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:58:52,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:58:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:58:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:58:52,783 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 [2022-03-03 18:58:52,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:58:52,965 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 30 treesize of output 24 [2022-03-03 18:58:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:53,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:58:53,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:58:53,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-03-03 18:58:53,515 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:58:53,515 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 28 treesize of output 25 [2022-03-03 18:58:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:53,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700551357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:58:53,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:58:53,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 18:58:53,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920047792] [2022-03-03 18:58:53,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:58:53,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:58:53,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:53,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:58:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:58:53,520 INFO L87 Difference]: Start difference. First operand 313 states and 917 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2022-03-03 18:58:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:54,007 INFO L93 Difference]: Finished difference Result 623 states and 1774 transitions. [2022-03-03 18:58:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:58:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 24 [2022-03-03 18:58:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:54,021 INFO L225 Difference]: With dead ends: 623 [2022-03-03 18:58:54,021 INFO L226 Difference]: Without dead ends: 550 [2022-03-03 18:58:54,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:58:54,022 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 171 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:54,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 280 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 700 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2022-03-03 18:58:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-03-03 18:58:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 327. [2022-03-03 18:58:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2022-03-03 18:58:54,031 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 24 [2022-03-03 18:58:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:54,031 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2022-03-03 18:58:54,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2022-03-03 18:58:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2022-03-03 18:58:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:58:54,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:54,032 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:54,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 18:58:54,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:54,247 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash 681039723, now seen corresponding path program 4 times [2022-03-03 18:58:54,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:54,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445503299] [2022-03-03 18:58:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:54,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:54,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:54,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445503299] [2022-03-03 18:58:54,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445503299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:58:54,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341833544] [2022-03-03 18:58:54,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:58:54,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:54,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:58:54,446 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) [2022-03-03 18:58:54,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 18:58:54,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:58:54,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:58:54,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:58:54,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:58:54,543 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 [2022-03-03 18:58:54,697 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 [2022-03-03 18:58:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:54,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:58:55,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:58:55,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 70 [2022-03-03 18:58:55,428 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:58:55,428 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 32 treesize of output 29 [2022-03-03 18:58:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:55,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341833544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:58:55,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:58:55,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 18:58:55,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443043632] [2022-03-03 18:58:55,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:58:55,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:58:55,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:58:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:58:55,434 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:56,475 INFO L93 Difference]: Finished difference Result 799 states and 2306 transitions. [2022-03-03 18:58:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:58:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:58:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:56,479 INFO L225 Difference]: With dead ends: 799 [2022-03-03 18:58:56,479 INFO L226 Difference]: Without dead ends: 678 [2022-03-03 18:58:56,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:58:56,480 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 158 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:56,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 311 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:58:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-03-03 18:58:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 369. [2022-03-03 18:58:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.005434782608696) internal successors, (1106), 368 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1106 transitions. [2022-03-03 18:58:56,490 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1106 transitions. Word has length 24 [2022-03-03 18:58:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:56,490 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1106 transitions. [2022-03-03 18:58:56,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1106 transitions. [2022-03-03 18:58:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:58:56,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:56,491 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:56,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-03 18:58:56,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:56,692 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash 281813425, now seen corresponding path program 5 times [2022-03-03 18:58:56,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:56,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298970324] [2022-03-03 18:58:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:56,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:56,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298970324] [2022-03-03 18:58:56,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298970324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:58:56,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229921801] [2022-03-03 18:58:56,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:58:56,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:56,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:58:56,861 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) [2022-03-03 18:58:56,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 18:58:56,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:58:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:58:56,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:58:56,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:58:56,975 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 [2022-03-03 18:58:57,071 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 [2022-03-03 18:58:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:57,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:58:57,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:58:57,450 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 79 treesize of output 70 [2022-03-03 18:58:57,580 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:58:57,580 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 28 treesize of output 25 [2022-03-03 18:58:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:57,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229921801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:58:57,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:58:57,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-03 18:58:57,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704953708] [2022-03-03 18:58:57,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:58:57,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:58:57,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:57,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:58:57,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:58:57,585 INFO L87 Difference]: Start difference. First operand 369 states and 1106 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2022-03-03 18:58:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:58,068 INFO L93 Difference]: Finished difference Result 493 states and 1458 transitions. [2022-03-03 18:58:58,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:58:58,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 24 [2022-03-03 18:58:58,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:58,070 INFO L225 Difference]: With dead ends: 493 [2022-03-03 18:58:58,070 INFO L226 Difference]: Without dead ends: 434 [2022-03-03 18:58:58,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:58:58,071 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 119 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:58,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 219 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:58:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-03 18:58:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 383. [2022-03-03 18:58:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.005235602094241) internal successors, (1148), 382 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1148 transitions. [2022-03-03 18:58:58,078 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1148 transitions. Word has length 24 [2022-03-03 18:58:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:58,078 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1148 transitions. [2022-03-03 18:58:58,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2022-03-03 18:58:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1148 transitions. [2022-03-03 18:58:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:58:58,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:58,079 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:58,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 18:58:58,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:58,287 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:58:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1933860043, now seen corresponding path program 6 times [2022-03-03 18:58:58,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:58,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482721960] [2022-03-03 18:58:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:58,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:58,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:58,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482721960] [2022-03-03 18:58:58,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482721960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:58:58,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455986850] [2022-03-03 18:58:58,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:58:58,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:58,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:58:58,492 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) [2022-03-03 18:58:58,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 18:58:58,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:58:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:58:58,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:58:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:58:58,619 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 [2022-03-03 18:58:58,670 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 [2022-03-03 18:58:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:58,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:58:59,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:58:59,232 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 113 treesize of output 99 [2022-03-03 18:58:59,516 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:58:59,517 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 32 treesize of output 29 [2022-03-03 18:58:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:58:59,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455986850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:58:59,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:58:59,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 18:58:59,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441766272] [2022-03-03 18:58:59,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:58:59,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:58:59,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:58:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:58:59,522 INFO L87 Difference]: Start difference. First operand 383 states and 1148 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:00,989 INFO L93 Difference]: Finished difference Result 847 states and 2349 transitions. [2022-03-03 18:59:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:59:00,990 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-03-03 18:59:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:00,993 INFO L225 Difference]: With dead ends: 847 [2022-03-03 18:59:00,993 INFO L226 Difference]: Without dead ends: 694 [2022-03-03 18:59:00,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:59:00,993 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 176 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:00,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 397 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:59:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-03 18:59:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 411. [2022-03-03 18:59:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.0902439024390245) internal successors, (1267), 410 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1267 transitions. [2022-03-03 18:59:01,002 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1267 transitions. Word has length 24 [2022-03-03 18:59:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:01,002 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1267 transitions. [2022-03-03 18:59:01,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1267 transitions. [2022-03-03 18:59:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:01,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:01,003 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:01,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:01,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:01,220 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:01,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash 212310717, now seen corresponding path program 7 times [2022-03-03 18:59:01,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:01,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823961603] [2022-03-03 18:59:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:01,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:01,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:01,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823961603] [2022-03-03 18:59:01,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823961603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:01,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577995573] [2022-03-03 18:59:01,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:59:01,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:01,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:01,373 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) [2022-03-03 18:59:01,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 18:59:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:01,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:01,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:01,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 18:59:01,535 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 [2022-03-03 18:59:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:01,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:02,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:02,085 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 102 treesize of output 90 [2022-03-03 18:59:02,298 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:02,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 29 [2022-03-03 18:59:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:02,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577995573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:02,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:02,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 18:59:02,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144910540] [2022-03-03 18:59:02,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:02,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:59:02,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:02,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:59:02,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:59:02,306 INFO L87 Difference]: Start difference. First operand 411 states and 1267 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2022-03-03 18:59:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:03,553 INFO L93 Difference]: Finished difference Result 879 states and 2526 transitions. [2022-03-03 18:59:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:59:03,554 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 24 [2022-03-03 18:59:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:03,556 INFO L225 Difference]: With dead ends: 879 [2022-03-03 18:59:03,556 INFO L226 Difference]: Without dead ends: 695 [2022-03-03 18:59:03,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:59:03,557 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 262 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:03,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 294 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:59:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-03-03 18:59:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 454. [2022-03-03 18:59:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1258278145695364) internal successors, (1416), 453 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1416 transitions. [2022-03-03 18:59:03,567 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1416 transitions. Word has length 24 [2022-03-03 18:59:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:03,567 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1416 transitions. [2022-03-03 18:59:03,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2022-03-03 18:59:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1416 transitions. [2022-03-03 18:59:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:03,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:03,568 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:03,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:03,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:03,786 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:03,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1190228181, now seen corresponding path program 8 times [2022-03-03 18:59:03,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:03,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209810683] [2022-03-03 18:59:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:03,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:03,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:03,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209810683] [2022-03-03 18:59:03,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209810683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:03,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172170439] [2022-03-03 18:59:03,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:59:03,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:03,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:03,930 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) [2022-03-03 18:59:03,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 18:59:03,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:59:03,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:03,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:03,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:04,044 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 [2022-03-03 18:59:04,134 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 [2022-03-03 18:59:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:04,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:04,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:04,522 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-03 18:59:04,660 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:04,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 18:59:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:04,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172170439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:04,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:04,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-03 18:59:04,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15246987] [2022-03-03 18:59:04,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:04,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:59:04,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:59:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:59:04,665 INFO L87 Difference]: Start difference. First operand 454 states and 1416 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2022-03-03 18:59:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:05,218 INFO L93 Difference]: Finished difference Result 590 states and 1805 transitions. [2022-03-03 18:59:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:59:05,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 24 [2022-03-03 18:59:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:05,221 INFO L225 Difference]: With dead ends: 590 [2022-03-03 18:59:05,221 INFO L226 Difference]: Without dead ends: 531 [2022-03-03 18:59:05,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:59:05,222 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:05,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 251 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:59:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-03-03 18:59:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 481. [2022-03-03 18:59:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.11875) internal successors, (1497), 480 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1497 transitions. [2022-03-03 18:59:05,230 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1497 transitions. Word has length 24 [2022-03-03 18:59:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:05,230 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1497 transitions. [2022-03-03 18:59:05,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2022-03-03 18:59:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1497 transitions. [2022-03-03 18:59:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:05,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:05,231 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:05,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:05,447 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,SelfDestructingSolverStorable23 [2022-03-03 18:59:05,448 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:05,448 INFO L85 PathProgramCache]: Analyzing trace with hash 889065647, now seen corresponding path program 9 times [2022-03-03 18:59:05,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:05,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004584188] [2022-03-03 18:59:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:05,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:05,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:05,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004584188] [2022-03-03 18:59:05,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004584188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:05,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529800580] [2022-03-03 18:59:05,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:59:05,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:05,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:05,618 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) [2022-03-03 18:59:05,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 18:59:05,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:59:05,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:05,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:05,739 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 [2022-03-03 18:59:05,792 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 [2022-03-03 18:59:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:05,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:06,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:06,326 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 113 treesize of output 99 [2022-03-03 18:59:06,575 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:06,575 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-03 18:59:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:06,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529800580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:06,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:06,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 18:59:06,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892044456] [2022-03-03 18:59:06,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:06,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:59:06,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:59:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:59:06,580 INFO L87 Difference]: Start difference. First operand 481 states and 1497 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:07,791 INFO L93 Difference]: Finished difference Result 1091 states and 3065 transitions. [2022-03-03 18:59:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:59:07,791 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-03-03 18:59:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:07,794 INFO L225 Difference]: With dead ends: 1091 [2022-03-03 18:59:07,794 INFO L226 Difference]: Without dead ends: 907 [2022-03-03 18:59:07,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:59:07,795 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 224 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:07,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 348 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:59:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-03 18:59:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 474. [2022-03-03 18:59:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.120507399577167) internal successors, (1476), 473 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1476 transitions. [2022-03-03 18:59:07,805 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1476 transitions. Word has length 24 [2022-03-03 18:59:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:07,806 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1476 transitions. [2022-03-03 18:59:07,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1476 transitions. [2022-03-03 18:59:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:07,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:07,807 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:07,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:08,023 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,SelfDestructingSolverStorable24 [2022-03-03 18:59:08,023 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1259730889, now seen corresponding path program 10 times [2022-03-03 18:59:08,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:08,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168211383] [2022-03-03 18:59:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:08,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:08,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:08,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168211383] [2022-03-03 18:59:08,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168211383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:08,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389536556] [2022-03-03 18:59:08,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:59:08,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:08,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:08,178 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) [2022-03-03 18:59:08,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 18:59:08,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:59:08,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:08,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:08,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:08,293 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 [2022-03-03 18:59:08,328 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 [2022-03-03 18:59:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:08,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:08,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:08,821 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-03 18:59:09,032 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:09,032 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-03 18:59:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:09,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389536556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:09,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:09,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 18:59:09,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327328610] [2022-03-03 18:59:09,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:09,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:59:09,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:09,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:59:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:59:09,037 INFO L87 Difference]: Start difference. First operand 474 states and 1476 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:09,987 INFO L93 Difference]: Finished difference Result 843 states and 2477 transitions. [2022-03-03 18:59:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:59:09,988 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-03-03 18:59:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:09,994 INFO L225 Difference]: With dead ends: 843 [2022-03-03 18:59:09,994 INFO L226 Difference]: Without dead ends: 721 [2022-03-03 18:59:09,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:59:09,994 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 213 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:09,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 258 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:59:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-03-03 18:59:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 488. [2022-03-03 18:59:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.131416837782341) internal successors, (1525), 487 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1525 transitions. [2022-03-03 18:59:10,004 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1525 transitions. Word has length 24 [2022-03-03 18:59:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:10,004 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1525 transitions. [2022-03-03 18:59:10,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1525 transitions. [2022-03-03 18:59:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:10,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:10,005 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:10,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:10,222 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,SelfDestructingSolverStorable25 [2022-03-03 18:59:10,222 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1941144819, now seen corresponding path program 11 times [2022-03-03 18:59:10,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:10,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28400896] [2022-03-03 18:59:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:10,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:10,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28400896] [2022-03-03 18:59:10,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28400896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:10,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447102091] [2022-03-03 18:59:10,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:59:10,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:10,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:10,381 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) [2022-03-03 18:59:10,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 18:59:10,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:59:10,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:10,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:10,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:10,481 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 [2022-03-03 18:59:10,522 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 [2022-03-03 18:59:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:10,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:10,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:10,987 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 43 treesize of output 41 [2022-03-03 18:59:11,070 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:11,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 18:59:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:11,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447102091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:11,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:11,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 18:59:11,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186020127] [2022-03-03 18:59:11,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:11,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:59:11,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:59:11,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:59:11,076 INFO L87 Difference]: Start difference. First operand 488 states and 1525 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2022-03-03 18:59:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:11,653 INFO L93 Difference]: Finished difference Result 816 states and 2533 transitions. [2022-03-03 18:59:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:59:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 24 [2022-03-03 18:59:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:11,656 INFO L225 Difference]: With dead ends: 816 [2022-03-03 18:59:11,656 INFO L226 Difference]: Without dead ends: 770 [2022-03-03 18:59:11,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:59:11,657 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:11,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 214 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:59:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-03 18:59:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 542. [2022-03-03 18:59:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.142329020332717) internal successors, (1700), 541 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1700 transitions. [2022-03-03 18:59:11,667 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1700 transitions. Word has length 24 [2022-03-03 18:59:11,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:11,667 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1700 transitions. [2022-03-03 18:59:11,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2022-03-03 18:59:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1700 transitions. [2022-03-03 18:59:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:11,668 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:11,668 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:11,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:11,883 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,SelfDestructingSolverStorable26 [2022-03-03 18:59:11,883 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 542857643, now seen corresponding path program 12 times [2022-03-03 18:59:11,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:11,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698001146] [2022-03-03 18:59:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:11,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:12,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:12,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698001146] [2022-03-03 18:59:12,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698001146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:12,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397491383] [2022-03-03 18:59:12,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:59:12,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:12,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:12,056 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) [2022-03-03 18:59:12,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 18:59:12,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:59:12,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:12,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:12,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:12,156 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 35 [2022-03-03 18:59:12,302 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 22 [2022-03-03 18:59:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:12,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:12,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:12,767 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 78 treesize of output 70 [2022-03-03 18:59:12,903 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:12,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 29 [2022-03-03 18:59:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:12,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397491383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:12,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:12,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 18:59:12,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080221531] [2022-03-03 18:59:12,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:12,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:59:12,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:59:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:59:12,909 INFO L87 Difference]: Start difference. First operand 542 states and 1700 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:14,771 INFO L93 Difference]: Finished difference Result 1433 states and 4255 transitions. [2022-03-03 18:59:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 18:59:14,771 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:59:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:14,776 INFO L225 Difference]: With dead ends: 1433 [2022-03-03 18:59:14,776 INFO L226 Difference]: Without dead ends: 1302 [2022-03-03 18:59:14,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=406, Invalid=1850, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 18:59:14,777 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 329 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:14,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 410 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:59:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-03-03 18:59:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 579. [2022-03-03 18:59:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 3.124567474048443) internal successors, (1806), 578 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) [2022-03-03 18:59:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1806 transitions. [2022-03-03 18:59:14,790 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1806 transitions. Word has length 24 [2022-03-03 18:59:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:14,790 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1806 transitions. [2022-03-03 18:59:14,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1806 transitions. [2022-03-03 18:59:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:14,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:14,791 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:14,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-03 18:59:15,007 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,SelfDestructingSolverStorable27 [2022-03-03 18:59:15,008 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1559402575, now seen corresponding path program 13 times [2022-03-03 18:59:15,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:15,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463200279] [2022-03-03 18:59:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:15,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:15,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:15,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463200279] [2022-03-03 18:59:15,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463200279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:15,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071657482] [2022-03-03 18:59:15,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:59:15,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:15,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:15,173 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) [2022-03-03 18:59:15,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 18:59:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:15,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:15,267 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 35 [2022-03-03 18:59:15,456 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 [2022-03-03 18:59:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:15,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:15,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:15,981 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 78 treesize of output 70 [2022-03-03 18:59:16,109 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:16,109 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 32 treesize of output 29 [2022-03-03 18:59:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:16,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071657482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:16,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:16,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 18:59:16,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143239683] [2022-03-03 18:59:16,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:16,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:59:16,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:59:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:59:16,114 INFO L87 Difference]: Start difference. First operand 579 states and 1806 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:18,312 INFO L93 Difference]: Finished difference Result 1277 states and 3772 transitions. [2022-03-03 18:59:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 18:59:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:59:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:18,316 INFO L225 Difference]: With dead ends: 1277 [2022-03-03 18:59:18,317 INFO L226 Difference]: Without dead ends: 1136 [2022-03-03 18:59:18,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:59:18,318 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 204 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:18,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 359 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:59:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-03-03 18:59:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 628. [2022-03-03 18:59:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.090909090909091) internal successors, (1938), 627 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1938 transitions. [2022-03-03 18:59:18,342 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1938 transitions. Word has length 24 [2022-03-03 18:59:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:18,342 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1938 transitions. [2022-03-03 18:59:18,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1938 transitions. [2022-03-03 18:59:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:18,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:18,344 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:18,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:18,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 18:59:18,544 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:18,545 INFO L85 PathProgramCache]: Analyzing trace with hash -395469401, now seen corresponding path program 14 times [2022-03-03 18:59:18,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:18,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324558315] [2022-03-03 18:59:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:18,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:18,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324558315] [2022-03-03 18:59:18,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324558315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:18,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603827427] [2022-03-03 18:59:18,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:59:18,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:18,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:18,744 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) [2022-03-03 18:59:18,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 18:59:18,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:59:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:18,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:18,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:18,848 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 35 [2022-03-03 18:59:18,933 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 41 [2022-03-03 18:59:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:19,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:19,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:19,661 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 50 treesize of output 47 [2022-03-03 18:59:19,703 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:19,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 18:59:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:19,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603827427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:19,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:19,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 18:59:19,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922118304] [2022-03-03 18:59:19,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:19,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:59:19,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:59:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:59:19,708 INFO L87 Difference]: Start difference. First operand 628 states and 1938 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:23,634 INFO L93 Difference]: Finished difference Result 1574 states and 4416 transitions. [2022-03-03 18:59:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:59:23,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:59:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:23,646 INFO L225 Difference]: With dead ends: 1574 [2022-03-03 18:59:23,646 INFO L226 Difference]: Without dead ends: 1397 [2022-03-03 18:59:23,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=579, Invalid=2613, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 18:59:23,648 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 282 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:23,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 449 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:59:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2022-03-03 18:59:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 677. [2022-03-03 18:59:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.1227810650887573) internal successors, (2111), 676 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2111 transitions. [2022-03-03 18:59:23,663 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2111 transitions. Word has length 24 [2022-03-03 18:59:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:23,663 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2111 transitions. [2022-03-03 18:59:23,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2111 transitions. [2022-03-03 18:59:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:23,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:23,664 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:23,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-03 18:59:23,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:23,880 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1939707733, now seen corresponding path program 15 times [2022-03-03 18:59:23,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:23,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644737948] [2022-03-03 18:59:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:24,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:24,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644737948] [2022-03-03 18:59:24,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644737948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:24,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939979858] [2022-03-03 18:59:24,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:59:24,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:24,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:24,058 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) [2022-03-03 18:59:24,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 18:59:24,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:59:24,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:24,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:24,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:24,150 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 35 [2022-03-03 18:59:24,297 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 [2022-03-03 18:59:24,299 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 25 treesize of output 17 [2022-03-03 18:59:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:24,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:24,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:24,797 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 78 treesize of output 70 [2022-03-03 18:59:24,935 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:24,935 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 32 treesize of output 29 [2022-03-03 18:59:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:24,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939979858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:24,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:24,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 18:59:24,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79658992] [2022-03-03 18:59:24,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:24,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:59:24,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:59:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:59:24,940 INFO L87 Difference]: Start difference. First operand 677 states and 2111 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:26,567 INFO L93 Difference]: Finished difference Result 1962 states and 5719 transitions. [2022-03-03 18:59:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 18:59:26,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:59:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:26,574 INFO L225 Difference]: With dead ends: 1962 [2022-03-03 18:59:26,574 INFO L226 Difference]: Without dead ends: 1796 [2022-03-03 18:59:26,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=443, Invalid=1909, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 18:59:26,575 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 353 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:26,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 376 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:59:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-03-03 18:59:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 679. [2022-03-03 18:59:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.144542772861357) internal successors, (2132), 678 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2132 transitions. [2022-03-03 18:59:26,592 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2132 transitions. Word has length 24 [2022-03-03 18:59:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:26,592 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2132 transitions. [2022-03-03 18:59:26,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2132 transitions. [2022-03-03 18:59:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:26,593 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:26,593 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:26,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:26,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:26,810 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2011775409, now seen corresponding path program 16 times [2022-03-03 18:59:26,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:26,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569544884] [2022-03-03 18:59:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:26,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:26,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:26,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569544884] [2022-03-03 18:59:26,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569544884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:26,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791562410] [2022-03-03 18:59:26,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:59:26,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:26,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:27,000 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) [2022-03-03 18:59:27,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 18:59:27,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:59:27,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:27,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:27,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:27,203 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 41 treesize of output 35 [2022-03-03 18:59:27,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:27,412 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 23 [2022-03-03 18:59:27,414 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 22 treesize of output 14 [2022-03-03 18:59:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:27,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:28,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:28,017 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-03 18:59:28,122 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:28,123 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 32 treesize of output 29 [2022-03-03 18:59:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:28,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791562410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:28,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:28,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 18:59:28,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375035766] [2022-03-03 18:59:28,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:28,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:59:28,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:28,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:59:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:59:28,129 INFO L87 Difference]: Start difference. First operand 679 states and 2132 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-03-03 18:59:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:28,361 INFO L93 Difference]: Finished difference Result 851 states and 2613 transitions. [2022-03-03 18:59:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:59:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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 24 [2022-03-03 18:59:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:28,364 INFO L225 Difference]: With dead ends: 851 [2022-03-03 18:59:28,364 INFO L226 Difference]: Without dead ends: 792 [2022-03-03 18:59:28,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:59:28,364 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:28,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 201 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 461 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-03-03 18:59:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-03-03 18:59:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 688. [2022-03-03 18:59:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.151382823871907) internal successors, (2165), 687 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2165 transitions. [2022-03-03 18:59:28,374 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2165 transitions. Word has length 24 [2022-03-03 18:59:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:28,375 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 2165 transitions. [2022-03-03 18:59:28,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-03-03 18:59:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2165 transitions. [2022-03-03 18:59:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:28,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:28,376 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:28,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:28,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:28,593 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash -957667723, now seen corresponding path program 17 times [2022-03-03 18:59:28,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:28,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632592820] [2022-03-03 18:59:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:28,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:28,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:28,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632592820] [2022-03-03 18:59:28,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632592820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:28,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425290771] [2022-03-03 18:59:28,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:59:28,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:28,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:28,796 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) [2022-03-03 18:59:28,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 18:59:28,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:59:28,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:28,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:28,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:28,946 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 [2022-03-03 18:59:29,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:29,201 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 26 treesize of output 22 [2022-03-03 18:59:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:29,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:30,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:30,053 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-03 18:59:30,161 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:30,161 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 [2022-03-03 18:59:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:30,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425290771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:30,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:30,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 18:59:30,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048309701] [2022-03-03 18:59:30,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:30,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:59:30,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:59:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:59:30,167 INFO L87 Difference]: Start difference. First operand 688 states and 2165 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 18:59:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:30,322 INFO L93 Difference]: Finished difference Result 800 states and 2503 transitions. [2022-03-03 18:59:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:59:30,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 18:59:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:30,324 INFO L225 Difference]: With dead ends: 800 [2022-03-03 18:59:30,325 INFO L226 Difference]: Without dead ends: 769 [2022-03-03 18:59:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:59:30,325 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:30,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 200 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 293 Invalid, 0 Unknown, 343 Unchecked, 0.1s Time] [2022-03-03 18:59:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-03-03 18:59:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 692. [2022-03-03 18:59:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.154848046309696) internal successors, (2180), 691 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2180 transitions. [2022-03-03 18:59:30,336 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2180 transitions. Word has length 24 [2022-03-03 18:59:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:30,336 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2180 transitions. [2022-03-03 18:59:30,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 18:59:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2180 transitions. [2022-03-03 18:59:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:30,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:30,338 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:30,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:30,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:30,548 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:30,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1470118745, now seen corresponding path program 18 times [2022-03-03 18:59:30,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:30,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808940541] [2022-03-03 18:59:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:30,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:30,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808940541] [2022-03-03 18:59:30,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808940541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:30,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686223378] [2022-03-03 18:59:30,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:59:30,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:30,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:30,742 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) [2022-03-03 18:59:30,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 18:59:30,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:59:30,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:30,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:30,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:30,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 18:59:30,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:30,970 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 47 treesize of output 41 [2022-03-03 18:59:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:31,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:31,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:31,871 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-03-03 18:59:31,923 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:31,924 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 28 treesize of output 25 [2022-03-03 18:59:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:31,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686223378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:31,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:31,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 18:59:31,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503264070] [2022-03-03 18:59:31,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:31,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:59:31,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:59:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:59:31,929 INFO L87 Difference]: Start difference. First operand 692 states and 2180 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:32,380 INFO L93 Difference]: Finished difference Result 820 states and 2549 transitions. [2022-03-03 18:59:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:59:32,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-03-03 18:59:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:32,382 INFO L225 Difference]: With dead ends: 820 [2022-03-03 18:59:32,382 INFO L226 Difference]: Without dead ends: 779 [2022-03-03 18:59:32,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:59:32,382 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:32,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 285 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 618 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2022-03-03 18:59:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-03 18:59:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 700. [2022-03-03 18:59:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 3.1659513590844064) internal successors, (2213), 699 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2213 transitions. [2022-03-03 18:59:32,392 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2213 transitions. Word has length 24 [2022-03-03 18:59:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:32,392 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 2213 transitions. [2022-03-03 18:59:32,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2213 transitions. [2022-03-03 18:59:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:32,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:32,394 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:32,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:32,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:32,610 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:32,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:32,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1720919203, now seen corresponding path program 19 times [2022-03-03 18:59:32,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:32,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408502005] [2022-03-03 18:59:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:32,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:32,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:32,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408502005] [2022-03-03 18:59:32,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408502005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:32,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598856008] [2022-03-03 18:59:32,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:59:32,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:32,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:32,785 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) [2022-03-03 18:59:32,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 18:59:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:32,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:32,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:32,919 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 26 treesize of output 20 [2022-03-03 18:59:33,087 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 [2022-03-03 18:59:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:33,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:33,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:33,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 70 [2022-03-03 18:59:33,805 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:33,806 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 32 treesize of output 29 [2022-03-03 18:59:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:33,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598856008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:33,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:33,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 18:59:33,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014268713] [2022-03-03 18:59:33,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:33,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:59:33,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:59:33,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:59:33,811 INFO L87 Difference]: Start difference. First operand 700 states and 2213 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:34,716 INFO L93 Difference]: Finished difference Result 1481 states and 4516 transitions. [2022-03-03 18:59:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:59:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:59:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:34,719 INFO L225 Difference]: With dead ends: 1481 [2022-03-03 18:59:34,719 INFO L226 Difference]: Without dead ends: 1332 [2022-03-03 18:59:34,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:59:34,720 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 195 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:34,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 271 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:59:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2022-03-03 18:59:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 693. [2022-03-03 18:59:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.1459537572254335) internal successors, (2177), 692 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2177 transitions. [2022-03-03 18:59:34,733 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2177 transitions. Word has length 24 [2022-03-03 18:59:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:34,733 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 2177 transitions. [2022-03-03 18:59:34,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2177 transitions. [2022-03-03 18:59:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:34,734 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:34,734 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:34,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-03 18:59:34,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:34,951 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:34,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1670091215, now seen corresponding path program 20 times [2022-03-03 18:59:34,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:34,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371074671] [2022-03-03 18:59:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:35,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:35,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371074671] [2022-03-03 18:59:35,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371074671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:35,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403596830] [2022-03-03 18:59:35,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:59:35,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:35,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:35,094 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) [2022-03-03 18:59:35,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 18:59:35,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:59:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:35,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:35,233 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 [2022-03-03 18:59:35,321 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 [2022-03-03 18:59:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:35,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:35,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:35,700 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 79 treesize of output 70 [2022-03-03 18:59:35,860 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:35,860 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 25 [2022-03-03 18:59:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:35,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403596830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:35,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:35,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 18:59:35,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840520423] [2022-03-03 18:59:35,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:59:35,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:59:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:59:35,865 INFO L87 Difference]: Start difference. First operand 693 states and 2177 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-03-03 18:59:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:36,283 INFO L93 Difference]: Finished difference Result 923 states and 2863 transitions. [2022-03-03 18:59:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:59:36,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 24 [2022-03-03 18:59:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:36,285 INFO L225 Difference]: With dead ends: 923 [2022-03-03 18:59:36,286 INFO L226 Difference]: Without dead ends: 864 [2022-03-03 18:59:36,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:59:36,286 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 117 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:36,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 194 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:59:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-03-03 18:59:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 707. [2022-03-03 18:59:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.143059490084986) internal successors, (2219), 706 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2219 transitions. [2022-03-03 18:59:36,296 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2219 transitions. Word has length 24 [2022-03-03 18:59:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:36,297 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 2219 transitions. [2022-03-03 18:59:36,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-03-03 18:59:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2219 transitions. [2022-03-03 18:59:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:36,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:36,298 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:36,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:36,510 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,SelfDestructingSolverStorable35 [2022-03-03 18:59:36,511 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:36,511 INFO L85 PathProgramCache]: Analyzing trace with hash 409202613, now seen corresponding path program 21 times [2022-03-03 18:59:36,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:36,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966216096] [2022-03-03 18:59:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:36,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:36,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:36,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966216096] [2022-03-03 18:59:36,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966216096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:36,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852292816] [2022-03-03 18:59:36,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:59:36,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:36,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:36,683 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) [2022-03-03 18:59:36,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 18:59:36,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:59:36,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:36,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:36,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:36,818 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 [2022-03-03 18:59:36,847 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 [2022-03-03 18:59:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:36,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:37,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:37,318 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-03-03 18:59:37,486 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:37,487 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 28 treesize of output 25 [2022-03-03 18:59:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:37,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852292816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:37,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:37,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 18:59:37,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782744910] [2022-03-03 18:59:37,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:37,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:59:37,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:37,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:59:37,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:59:37,491 INFO L87 Difference]: Start difference. First operand 707 states and 2219 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-03-03 18:59:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:38,022 INFO L93 Difference]: Finished difference Result 909 states and 2821 transitions. [2022-03-03 18:59:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:59:38,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 24 [2022-03-03 18:59:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:38,024 INFO L225 Difference]: With dead ends: 909 [2022-03-03 18:59:38,024 INFO L226 Difference]: Without dead ends: 864 [2022-03-03 18:59:38,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:59:38,025 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:38,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 266 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:59:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-03-03 18:59:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 707. [2022-03-03 18:59:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.143059490084986) internal successors, (2219), 706 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2219 transitions. [2022-03-03 18:59:38,035 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2219 transitions. Word has length 24 [2022-03-03 18:59:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:38,035 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 2219 transitions. [2022-03-03 18:59:38,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-03-03 18:59:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2219 transitions. [2022-03-03 18:59:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:38,037 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:38,037 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:38,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:38,251 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,SelfDestructingSolverStorable36 [2022-03-03 18:59:38,251 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1739593923, now seen corresponding path program 22 times [2022-03-03 18:59:38,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:38,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780047457] [2022-03-03 18:59:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:38,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:38,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:38,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780047457] [2022-03-03 18:59:38,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780047457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:38,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555727829] [2022-03-03 18:59:38,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:59:38,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:38,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:38,415 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) [2022-03-03 18:59:38,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 18:59:38,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:59:38,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:38,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:38,561 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 [2022-03-03 18:59:38,597 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 [2022-03-03 18:59:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:38,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:39,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:39,085 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 102 treesize of output 90 [2022-03-03 18:59:39,325 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:39,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 29 [2022-03-03 18:59:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:39,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555727829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:39,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:39,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 18:59:39,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745902914] [2022-03-03 18:59:39,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:39,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:59:39,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:59:39,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:59:39,330 INFO L87 Difference]: Start difference. First operand 707 states and 2219 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:40,584 INFO L93 Difference]: Finished difference Result 1380 states and 4118 transitions. [2022-03-03 18:59:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:59:40,585 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:59:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:40,587 INFO L225 Difference]: With dead ends: 1380 [2022-03-03 18:59:40,587 INFO L226 Difference]: Without dead ends: 1196 [2022-03-03 18:59:40,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:59:40,588 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 226 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:40,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 289 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:59:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-03-03 18:59:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 707. [2022-03-03 18:59:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.143059490084986) internal successors, (2219), 706 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2219 transitions. [2022-03-03 18:59:40,600 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2219 transitions. Word has length 24 [2022-03-03 18:59:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:40,600 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 2219 transitions. [2022-03-03 18:59:40,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2219 transitions. [2022-03-03 18:59:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:40,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:40,601 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:40,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:40,802 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,SelfDestructingSolverStorable37 [2022-03-03 18:59:40,802 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:40,802 INFO L85 PathProgramCache]: Analyzing trace with hash 170403073, now seen corresponding path program 23 times [2022-03-03 18:59:40,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:40,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860099578] [2022-03-03 18:59:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:40,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:40,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:40,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860099578] [2022-03-03 18:59:40,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860099578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:40,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031586571] [2022-03-03 18:59:40,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:59:40,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:40,961 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) [2022-03-03 18:59:40,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 18:59:40,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:59:40,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:40,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:40,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:41,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:41,140 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 [2022-03-03 18:59:41,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:41,360 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 26 treesize of output 22 [2022-03-03 18:59:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:41,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:41,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:41,922 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 141 treesize of output 121 [2022-03-03 18:59:42,084 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:42,085 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 28 treesize of output 25 [2022-03-03 18:59:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:42,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031586571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:42,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:42,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 18:59:42,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610507633] [2022-03-03 18:59:42,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:42,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:59:42,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:42,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:59:42,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:59:42,091 INFO L87 Difference]: Start difference. First operand 707 states and 2219 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:42,210 INFO L93 Difference]: Finished difference Result 830 states and 2583 transitions. [2022-03-03 18:59:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:59:42,210 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:59:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:42,212 INFO L225 Difference]: With dead ends: 830 [2022-03-03 18:59:42,212 INFO L226 Difference]: Without dead ends: 799 [2022-03-03 18:59:42,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:59:42,215 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:42,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 207 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 201 Unchecked, 0.1s Time] [2022-03-03 18:59:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-03 18:59:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 709. [2022-03-03 18:59:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 3.1440677966101696) internal successors, (2226), 708 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 2226 transitions. [2022-03-03 18:59:42,225 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 2226 transitions. Word has length 24 [2022-03-03 18:59:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:42,226 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 2226 transitions. [2022-03-03 18:59:42,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 2226 transitions. [2022-03-03 18:59:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:42,227 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:42,228 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:42,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:42,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:42,428 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:42,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1334336247, now seen corresponding path program 24 times [2022-03-03 18:59:42,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:42,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741335078] [2022-03-03 18:59:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:42,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:42,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:42,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741335078] [2022-03-03 18:59:42,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741335078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:42,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498724434] [2022-03-03 18:59:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:59:42,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:42,618 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) [2022-03-03 18:59:42,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 18:59:42,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:59:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:42,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:42,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:42,799 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 41 treesize of output 35 [2022-03-03 18:59:42,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:42,923 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 47 treesize of output 41 [2022-03-03 18:59:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:43,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:43,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:43,539 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 18:59:43,691 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:43,692 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 28 treesize of output 25 [2022-03-03 18:59:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:43,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498724434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:43,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:43,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 18:59:43,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563985330] [2022-03-03 18:59:43,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:43,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:59:43,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:59:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:59:43,697 INFO L87 Difference]: Start difference. First operand 709 states and 2226 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2022-03-03 18:59:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:43,876 INFO L93 Difference]: Finished difference Result 812 states and 2528 transitions. [2022-03-03 18:59:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:59:43,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 24 [2022-03-03 18:59:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:43,878 INFO L225 Difference]: With dead ends: 812 [2022-03-03 18:59:43,878 INFO L226 Difference]: Without dead ends: 777 [2022-03-03 18:59:43,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:59:43,878 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:43,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 206 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 394 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2022-03-03 18:59:43,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-03-03 18:59:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 715. [2022-03-03 18:59:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.141456582633053) internal successors, (2243), 714 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2243 transitions. [2022-03-03 18:59:43,889 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2243 transitions. Word has length 24 [2022-03-03 18:59:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:43,889 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 2243 transitions. [2022-03-03 18:59:43,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2022-03-03 18:59:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2243 transitions. [2022-03-03 18:59:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:43,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:43,890 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:43,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:44,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 18:59:44,099 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:44,100 INFO L85 PathProgramCache]: Analyzing trace with hash 478953917, now seen corresponding path program 25 times [2022-03-03 18:59:44,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:44,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049158061] [2022-03-03 18:59:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:44,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:44,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:44,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049158061] [2022-03-03 18:59:44,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049158061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:44,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672232991] [2022-03-03 18:59:44,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:59:44,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:44,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:44,285 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) [2022-03-03 18:59:44,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 18:59:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:44,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:44,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:44,405 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 35 [2022-03-03 18:59:44,533 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 [2022-03-03 18:59:44,535 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 25 treesize of output 17 [2022-03-03 18:59:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:44,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:45,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:45,048 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 111 treesize of output 97 [2022-03-03 18:59:45,246 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:45,247 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 32 treesize of output 29 [2022-03-03 18:59:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:45,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672232991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:45,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:45,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 18:59:45,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356667008] [2022-03-03 18:59:45,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:45,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:59:45,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:45,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:59:45,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:59:45,252 INFO L87 Difference]: Start difference. First operand 715 states and 2243 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:46,207 INFO L93 Difference]: Finished difference Result 1124 states and 3398 transitions. [2022-03-03 18:59:46,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 18:59:46,207 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:59:46,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:46,209 INFO L225 Difference]: With dead ends: 1124 [2022-03-03 18:59:46,209 INFO L226 Difference]: Without dead ends: 1003 [2022-03-03 18:59:46,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 18:59:46,210 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 116 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:46,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 317 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:59:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-03-03 18:59:46,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 727. [2022-03-03 18:59:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.1487603305785123) internal successors, (2286), 726 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2286 transitions. [2022-03-03 18:59:46,222 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2286 transitions. Word has length 24 [2022-03-03 18:59:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:46,222 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 2286 transitions. [2022-03-03 18:59:46,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2286 transitions. [2022-03-03 18:59:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:46,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:46,223 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:46,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:46,439 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,SelfDestructingSolverStorable40 [2022-03-03 18:59:46,440 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash 259722689, now seen corresponding path program 26 times [2022-03-03 18:59:46,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:46,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117950103] [2022-03-03 18:59:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:46,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:46,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:46,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117950103] [2022-03-03 18:59:46,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117950103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:46,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596168988] [2022-03-03 18:59:46,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:59:46,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:46,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:46,617 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) [2022-03-03 18:59:46,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 18:59:46,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:59:46,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:46,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:46,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:46,754 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 35 [2022-03-03 18:59:46,837 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 26 treesize of output 22 [2022-03-03 18:59:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:46,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:47,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:47,440 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 72 treesize of output 65 [2022-03-03 18:59:47,587 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:47,588 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 28 treesize of output 25 [2022-03-03 18:59:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:47,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596168988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:47,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:47,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 18:59:47,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062644848] [2022-03-03 18:59:47,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:47,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:59:47,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:47,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:59:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:59:47,592 INFO L87 Difference]: Start difference. First operand 727 states and 2286 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 18:59:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:48,942 INFO L93 Difference]: Finished difference Result 1284 states and 3811 transitions. [2022-03-03 18:59:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:59:48,942 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 18:59:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:48,945 INFO L225 Difference]: With dead ends: 1284 [2022-03-03 18:59:48,945 INFO L226 Difference]: Without dead ends: 1123 [2022-03-03 18:59:48,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:59:48,946 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:48,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 384 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:59:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-03-03 18:59:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 749. [2022-03-03 18:59:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.1697860962566846) internal successors, (2371), 748 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) [2022-03-03 18:59:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2371 transitions. [2022-03-03 18:59:48,958 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2371 transitions. Word has length 24 [2022-03-03 18:59:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:48,959 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2371 transitions. [2022-03-03 18:59:48,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 18:59:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2371 transitions. [2022-03-03 18:59:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:48,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:48,960 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:48,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:49,170 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,SelfDestructingSolverStorable41 [2022-03-03 18:59:49,171 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1618009331, now seen corresponding path program 27 times [2022-03-03 18:59:49,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:49,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40400647] [2022-03-03 18:59:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:49,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:49,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40400647] [2022-03-03 18:59:49,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40400647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:49,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138928820] [2022-03-03 18:59:49,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:59:49,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:49,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:49,340 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) [2022-03-03 18:59:49,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 18:59:49,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:59:49,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:49,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:49,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:49,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:49,520 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 41 treesize of output 35 [2022-03-03 18:59:49,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:49,580 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 47 treesize of output 41 [2022-03-03 18:59:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:49,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:50,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:50,286 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 141 treesize of output 121 [2022-03-03 18:59:50,458 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:50,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 18:59:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:50,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138928820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:50,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:50,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 18:59:50,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078914916] [2022-03-03 18:59:50,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:50,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:59:50,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:59:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:59:50,464 INFO L87 Difference]: Start difference. First operand 749 states and 2371 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:51,438 INFO L93 Difference]: Finished difference Result 1145 states and 3413 transitions. [2022-03-03 18:59:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:59:51,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-03-03 18:59:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:51,441 INFO L225 Difference]: With dead ends: 1145 [2022-03-03 18:59:51,441 INFO L226 Difference]: Without dead ends: 1013 [2022-03-03 18:59:51,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:59:51,442 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 137 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:51,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 279 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 706 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2022-03-03 18:59:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-03 18:59:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 755. [2022-03-03 18:59:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.1856763925729443) internal successors, (2402), 754 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2402 transitions. [2022-03-03 18:59:51,454 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2402 transitions. Word has length 24 [2022-03-03 18:59:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:51,454 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2402 transitions. [2022-03-03 18:59:51,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 18:59:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2402 transitions. [2022-03-03 18:59:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:51,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:51,455 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:51,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:51,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:51,660 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash -252728333, now seen corresponding path program 28 times [2022-03-03 18:59:51,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:51,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729549428] [2022-03-03 18:59:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:51,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:51,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:51,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729549428] [2022-03-03 18:59:51,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729549428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:51,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192486247] [2022-03-03 18:59:51,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:59:51,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:51,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:51,854 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) [2022-03-03 18:59:51,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 18:59:51,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:59:51,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:51,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:51,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:52,028 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 41 treesize of output 35 [2022-03-03 18:59:52,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:52,097 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 47 treesize of output 41 [2022-03-03 18:59:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:52,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:53,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:53,017 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-03 18:59:53,204 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:53,204 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 32 treesize of output 29 [2022-03-03 18:59:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 18:59:53,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192486247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:53,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:53,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 18:59:53,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307019211] [2022-03-03 18:59:53,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:53,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:59:53,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:59:53,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:59:53,210 INFO L87 Difference]: Start difference. First operand 755 states and 2402 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:54,227 INFO L93 Difference]: Finished difference Result 1326 states and 3925 transitions. [2022-03-03 18:59:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:59:54,227 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:59:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:54,229 INFO L225 Difference]: With dead ends: 1326 [2022-03-03 18:59:54,229 INFO L226 Difference]: Without dead ends: 1208 [2022-03-03 18:59:54,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:59:54,230 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 120 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:54,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 337 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 821 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-03-03 18:59:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-03-03 18:59:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 768. [2022-03-03 18:59:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.1994784876140807) internal successors, (2454), 767 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) [2022-03-03 18:59:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2454 transitions. [2022-03-03 18:59:54,243 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2454 transitions. Word has length 24 [2022-03-03 18:59:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:54,243 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 2454 transitions. [2022-03-03 18:59:54,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2454 transitions. [2022-03-03 18:59:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:54,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:54,244 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:54,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:54,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:54,456 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1186027797, now seen corresponding path program 29 times [2022-03-03 18:59:54,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:54,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167546952] [2022-03-03 18:59:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:54,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:54,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:54,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167546952] [2022-03-03 18:59:54,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167546952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:54,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558806378] [2022-03-03 18:59:54,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:59:54,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:54,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:54,615 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) [2022-03-03 18:59:54,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 18:59:54,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:59:54,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:54,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:54,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:54,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:54,808 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 23 treesize of output 19 [2022-03-03 18:59:54,884 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 [2022-03-03 18:59:54,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:54,887 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-03 18:59:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:54,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:55,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:55,410 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 18:59:55,583 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:55,584 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 [2022-03-03 18:59:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:55,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558806378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:55,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:55,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 18:59:55,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947399219] [2022-03-03 18:59:55,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:55,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:59:55,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:55,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:59:55,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:59:55,589 INFO L87 Difference]: Start difference. First operand 768 states and 2454 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2022-03-03 18:59:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:55,765 INFO L93 Difference]: Finished difference Result 917 states and 2890 transitions. [2022-03-03 18:59:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:59:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 24 [2022-03-03 18:59:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:55,767 INFO L225 Difference]: With dead ends: 917 [2022-03-03 18:59:55,767 INFO L226 Difference]: Without dead ends: 886 [2022-03-03 18:59:55,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:59:55,768 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:55,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 230 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 454 Invalid, 0 Unknown, 419 Unchecked, 0.2s Time] [2022-03-03 18:59:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-03-03 18:59:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 763. [2022-03-03 18:59:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.202099737532808) internal successors, (2440), 762 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2440 transitions. [2022-03-03 18:59:55,779 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2440 transitions. Word has length 24 [2022-03-03 18:59:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:55,779 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2440 transitions. [2022-03-03 18:59:55,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2022-03-03 18:59:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2440 transitions. [2022-03-03 18:59:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:55,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:55,780 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:55,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:55,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:55,995 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:55,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:55,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1869613713, now seen corresponding path program 30 times [2022-03-03 18:59:55,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:55,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224249194] [2022-03-03 18:59:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:55,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:56,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:56,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224249194] [2022-03-03 18:59:56,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224249194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:56,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738637453] [2022-03-03 18:59:56,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:59:56,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:56,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:56,192 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) [2022-03-03 18:59:56,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 18:59:56,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:59:56,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:56,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 18:59:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:56,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:56,414 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 18:59:56,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:56,445 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 26 treesize of output 22 [2022-03-03 18:59:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:56,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:57,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:57,125 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 81 treesize of output 72 [2022-03-03 18:59:57,290 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:57,290 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 28 treesize of output 25 [2022-03-03 18:59:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:57,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738637453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:57,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:57,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 18:59:57,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454490718] [2022-03-03 18:59:57,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:57,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:59:57,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:57,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:59:57,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:59:57,296 INFO L87 Difference]: Start difference. First operand 763 states and 2440 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 18:59:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:57,970 INFO L93 Difference]: Finished difference Result 961 states and 3002 transitions. [2022-03-03 18:59:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:59:57,971 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 18:59:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:57,973 INFO L225 Difference]: With dead ends: 961 [2022-03-03 18:59:57,973 INFO L226 Difference]: Without dead ends: 876 [2022-03-03 18:59:57,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:59:57,974 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:57,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 230 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 543 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-03-03 18:59:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-03-03 18:59:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 771. [2022-03-03 18:59:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.2) internal successors, (2464), 770 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2464 transitions. [2022-03-03 18:59:57,987 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2464 transitions. Word has length 24 [2022-03-03 18:59:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:57,987 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 2464 transitions. [2022-03-03 18:59:57,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 18:59:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2464 transitions. [2022-03-03 18:59:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:59:57,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:57,988 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:58,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:58,205 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,SelfDestructingSolverStorable45 [2022-03-03 18:59:58,205 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 18:59:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:58,205 INFO L85 PathProgramCache]: Analyzing trace with hash -960638089, now seen corresponding path program 31 times [2022-03-03 18:59:58,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:58,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525621834] [2022-03-03 18:59:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:58,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:58,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:58,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525621834] [2022-03-03 18:59:58,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525621834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:58,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167164841] [2022-03-03 18:59:58,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:59:58,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:58,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:58,349 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) [2022-03-03 18:59:58,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 18:59:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 18:59:58,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:58,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:58,617 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 23 treesize of output 19 [2022-03-03 18:59:58,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 18:59:58,672 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 [2022-03-03 18:59:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:58,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:59,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:59,158 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 102 treesize of output 90 [2022-03-03 18:59:59,452 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 18:59:59,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 29 [2022-03-03 18:59:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 18:59:59,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167164841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:59,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:59,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 18:59:59,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377214399] [2022-03-03 18:59:59,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:59,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:59:59,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:59,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:59:59,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:59:59,458 INFO L87 Difference]: Start difference. First operand 771 states and 2464 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:00,173 INFO L93 Difference]: Finished difference Result 1143 states and 3464 transitions. [2022-03-03 19:00:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:00:00,174 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:00,176 INFO L225 Difference]: With dead ends: 1143 [2022-03-03 19:00:00,176 INFO L226 Difference]: Without dead ends: 990 [2022-03-03 19:00:00,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:00:00,176 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 160 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:00,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 222 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 394 Invalid, 0 Unknown, 210 Unchecked, 0.2s Time] [2022-03-03 19:00:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-03-03 19:00:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 778. [2022-03-03 19:00:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 3.2072072072072073) internal successors, (2492), 777 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2492 transitions. [2022-03-03 19:00:00,188 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2492 transitions. Word has length 24 [2022-03-03 19:00:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:00,188 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 2492 transitions. [2022-03-03 19:00:00,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2492 transitions. [2022-03-03 19:00:00,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:00,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:00,190 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:00,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:00,390 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,SelfDestructingSolverStorable46 [2022-03-03 19:00:00,390 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:00,391 INFO L85 PathProgramCache]: Analyzing trace with hash -373722487, now seen corresponding path program 32 times [2022-03-03 19:00:00,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:00,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577776296] [2022-03-03 19:00:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:00,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:00,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:00,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577776296] [2022-03-03 19:00:00,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577776296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:00,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680241929] [2022-03-03 19:00:00,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:00:00,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:00,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:00,532 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) [2022-03-03 19:00:00,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:00:00,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:00:00,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:00,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:00,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:00,700 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 19 treesize of output 15 [2022-03-03 19:00:00,746 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 [2022-03-03 19:00:00,748 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 [2022-03-03 19:00:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:00,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:01,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:01,114 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 141 treesize of output 121 [2022-03-03 19:00:01,351 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:01,351 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-03 19:00:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:01,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680241929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:01,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:01,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:00:01,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63912304] [2022-03-03 19:00:01,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:01,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:00:01,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:00:01,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:00:01,355 INFO L87 Difference]: Start difference. First operand 778 states and 2492 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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) [2022-03-03 19:00:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:01,783 INFO L93 Difference]: Finished difference Result 1006 states and 3125 transitions. [2022-03-03 19:00:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:00:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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 24 [2022-03-03 19:00:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:01,786 INFO L225 Difference]: With dead ends: 1006 [2022-03-03 19:00:01,786 INFO L226 Difference]: Without dead ends: 946 [2022-03-03 19:00:01,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:00:01,786 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:01,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 222 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 710 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2022-03-03 19:00:01,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-03 19:00:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 813. [2022-03-03 19:00:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.1921182266009853) internal successors, (2592), 812 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2592 transitions. [2022-03-03 19:00:01,800 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2592 transitions. Word has length 24 [2022-03-03 19:00:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:01,801 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 2592 transitions. [2022-03-03 19:00:01,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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) [2022-03-03 19:00:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2592 transitions. [2022-03-03 19:00:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:01,802 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:01,802 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:01,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:02,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:02,015 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:02,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1918087927, now seen corresponding path program 33 times [2022-03-03 19:00:02,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:02,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437398793] [2022-03-03 19:00:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:02,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:02,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:02,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437398793] [2022-03-03 19:00:02,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437398793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:02,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329174188] [2022-03-03 19:00:02,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:00:02,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:02,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:02,148 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) [2022-03-03 19:00:02,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:00:02,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:00:02,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:00:02,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:02,306 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 19 treesize of output 15 [2022-03-03 19:00:02,366 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 29 treesize of output 23 [2022-03-03 19:00:02,371 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 [2022-03-03 19:00:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:02,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:02,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:02,800 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 111 treesize of output 97 [2022-03-03 19:00:03,077 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:03,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 29 [2022-03-03 19:00:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:03,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329174188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:03,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:03,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:03,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174195826] [2022-03-03 19:00:03,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:03,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:03,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:03,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:03,082 INFO L87 Difference]: Start difference. First operand 813 states and 2592 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:03,663 INFO L93 Difference]: Finished difference Result 1021 states and 3191 transitions. [2022-03-03 19:00:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:00:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:03,665 INFO L225 Difference]: With dead ends: 1021 [2022-03-03 19:00:03,665 INFO L226 Difference]: Without dead ends: 932 [2022-03-03 19:00:03,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:00:03,666 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 151 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:03,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 272 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:00:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-03-03 19:00:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 816. [2022-03-03 19:00:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.204907975460123) internal successors, (2612), 815 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2612 transitions. [2022-03-03 19:00:03,682 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2612 transitions. Word has length 24 [2022-03-03 19:00:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:03,682 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 2612 transitions. [2022-03-03 19:00:03,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2612 transitions. [2022-03-03 19:00:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:03,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:03,683 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:03,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:03,899 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,SelfDestructingSolverStorable48 [2022-03-03 19:00:03,899 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398869, now seen corresponding path program 34 times [2022-03-03 19:00:03,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:03,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371161385] [2022-03-03 19:00:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:03,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:04,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:04,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371161385] [2022-03-03 19:00:04,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371161385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:04,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754197540] [2022-03-03 19:00:04,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:00:04,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:04,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:04,110 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) [2022-03-03 19:00:04,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:00:04,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:00:04,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:00:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:04,311 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 41 treesize of output 35 [2022-03-03 19:00:04,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:04,374 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 43 treesize of output 37 [2022-03-03 19:00:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:04,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:05,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:05,264 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-03 19:00:05,461 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:05,461 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 32 treesize of output 29 [2022-03-03 19:00:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:05,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754197540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:05,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:05,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:00:05,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380369751] [2022-03-03 19:00:05,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:05,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:00:05,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:00:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:00:05,467 INFO L87 Difference]: Start difference. First operand 816 states and 2612 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:07,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:07,275 INFO L93 Difference]: Finished difference Result 1579 states and 4532 transitions. [2022-03-03 19:00:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:00:07,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:07,278 INFO L225 Difference]: With dead ends: 1579 [2022-03-03 19:00:07,278 INFO L226 Difference]: Without dead ends: 1375 [2022-03-03 19:00:07,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:00:07,279 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 357 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:07,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 472 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 988 Invalid, 0 Unknown, 255 Unchecked, 0.5s Time] [2022-03-03 19:00:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-03-03 19:00:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 830. [2022-03-03 19:00:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.2279855247285885) internal successors, (2676), 829 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2676 transitions. [2022-03-03 19:00:07,293 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2676 transitions. Word has length 24 [2022-03-03 19:00:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:07,293 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2676 transitions. [2022-03-03 19:00:07,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2676 transitions. [2022-03-03 19:00:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:07,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:07,294 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:07,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:07,495 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,SelfDestructingSolverStorable49 [2022-03-03 19:00:07,495 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1657919583, now seen corresponding path program 35 times [2022-03-03 19:00:07,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:07,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693895550] [2022-03-03 19:00:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:07,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:07,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:07,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693895550] [2022-03-03 19:00:07,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693895550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:07,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578371871] [2022-03-03 19:00:07,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:00:07,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:07,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:07,714 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) [2022-03-03 19:00:07,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:00:07,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:00:07,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:07,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:07,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:07,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:07,905 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:00:08,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:08,008 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:00:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:08,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:08,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:08,792 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 143 treesize of output 123 [2022-03-03 19:00:09,013 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:09,014 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:00:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:09,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578371871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:09,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:09,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:09,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899432355] [2022-03-03 19:00:09,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:09,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:09,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:09,019 INFO L87 Difference]: Start difference. First operand 830 states and 2676 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:09,564 INFO L93 Difference]: Finished difference Result 1022 states and 3216 transitions. [2022-03-03 19:00:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:00:09,564 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:09,566 INFO L225 Difference]: With dead ends: 1022 [2022-03-03 19:00:09,566 INFO L226 Difference]: Without dead ends: 964 [2022-03-03 19:00:09,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:00:09,566 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:09,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 188 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 455 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-03-03 19:00:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-03-03 19:00:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 831. [2022-03-03 19:00:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.2289156626506026) internal successors, (2680), 830 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2680 transitions. [2022-03-03 19:00:09,577 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2680 transitions. Word has length 24 [2022-03-03 19:00:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:09,577 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 2680 transitions. [2022-03-03 19:00:09,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2680 transitions. [2022-03-03 19:00:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:09,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:09,578 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:09,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 19:00:09,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:09,794 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash -992161493, now seen corresponding path program 36 times [2022-03-03 19:00:09,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:09,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715465253] [2022-03-03 19:00:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:00:09,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:09,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715465253] [2022-03-03 19:00:09,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715465253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:09,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609563312] [2022-03-03 19:00:09,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:00:09,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:09,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:09,993 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) [2022-03-03 19:00:09,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:00:10,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:00:10,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:10,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:10,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:10,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:10,165 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 41 treesize of output 35 [2022-03-03 19:00:10,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:10,242 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 24 treesize of output 20 [2022-03-03 19:00:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:00:10,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:11,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:11,030 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 81 treesize of output 72 [2022-03-03 19:00:11,150 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:11,151 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 25 [2022-03-03 19:00:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:00:11,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609563312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:11,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:11,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:11,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552294415] [2022-03-03 19:00:11,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:11,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:11,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:11,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:11,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:11,156 INFO L87 Difference]: Start difference. First operand 831 states and 2680 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:11,495 INFO L93 Difference]: Finished difference Result 1015 states and 3207 transitions. [2022-03-03 19:00:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:00:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:11,497 INFO L225 Difference]: With dead ends: 1015 [2022-03-03 19:00:11,497 INFO L226 Difference]: Without dead ends: 939 [2022-03-03 19:00:11,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:00:11,497 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:11,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 239 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 450 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2022-03-03 19:00:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-03-03 19:00:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 838. [2022-03-03 19:00:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.2353643966547194) internal successors, (2708), 837 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2708 transitions. [2022-03-03 19:00:11,508 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2708 transitions. Word has length 24 [2022-03-03 19:00:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:11,508 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 2708 transitions. [2022-03-03 19:00:11,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2708 transitions. [2022-03-03 19:00:11,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:11,510 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:11,510 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:11,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:11,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:11,723 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1088483539, now seen corresponding path program 37 times [2022-03-03 19:00:11,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:11,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436403275] [2022-03-03 19:00:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:11,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:11,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:11,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436403275] [2022-03-03 19:00:11,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436403275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:11,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323602680] [2022-03-03 19:00:11,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:00:11,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:11,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:11,918 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) [2022-03-03 19:00:11,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:00:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:11,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:12,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:12,106 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 41 treesize of output 35 [2022-03-03 19:00:12,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:12,340 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 29 treesize of output 23 [2022-03-03 19:00:12,342 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 [2022-03-03 19:00:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:12,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:13,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:13,034 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:00:13,214 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:13,214 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:00:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:13,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323602680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:13,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:13,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:13,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749604851] [2022-03-03 19:00:13,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:13,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:13,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:13,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:13,228 INFO L87 Difference]: Start difference. First operand 838 states and 2708 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:13,426 INFO L93 Difference]: Finished difference Result 985 states and 3099 transitions. [2022-03-03 19:00:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:00:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:13,428 INFO L225 Difference]: With dead ends: 985 [2022-03-03 19:00:13,428 INFO L226 Difference]: Without dead ends: 927 [2022-03-03 19:00:13,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:00:13,430 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:13,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 319 Invalid, 0 Unknown, 370 Unchecked, 0.1s Time] [2022-03-03 19:00:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-03-03 19:00:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 866. [2022-03-03 19:00:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.213872832369942) internal successors, (2780), 865 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2780 transitions. [2022-03-03 19:00:13,441 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2780 transitions. Word has length 24 [2022-03-03 19:00:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:13,441 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 2780 transitions. [2022-03-03 19:00:13,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2780 transitions. [2022-03-03 19:00:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:13,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:13,443 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:13,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:13,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:13,644 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash -455881901, now seen corresponding path program 38 times [2022-03-03 19:00:13,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:13,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424019171] [2022-03-03 19:00:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:13,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:13,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:13,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424019171] [2022-03-03 19:00:13,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424019171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:13,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780768527] [2022-03-03 19:00:13,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:00:13,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:13,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:13,832 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) [2022-03-03 19:00:13,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:00:13,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:00:13,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:13,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:14,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:14,032 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 41 treesize of output 35 [2022-03-03 19:00:14,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:14,249 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 29 treesize of output 23 [2022-03-03 19:00:14,252 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 [2022-03-03 19:00:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:14,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:14,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:14,946 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 141 treesize of output 121 [2022-03-03 19:00:15,175 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:15,175 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 25 [2022-03-03 19:00:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:15,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780768527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:15,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:15,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:15,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528503665] [2022-03-03 19:00:15,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:15,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:15,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:15,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:15,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:15,181 INFO L87 Difference]: Start difference. First operand 866 states and 2780 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:15,357 INFO L93 Difference]: Finished difference Result 1012 states and 3168 transitions. [2022-03-03 19:00:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:00:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:15,358 INFO L225 Difference]: With dead ends: 1012 [2022-03-03 19:00:15,358 INFO L226 Difference]: Without dead ends: 962 [2022-03-03 19:00:15,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:00:15,359 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:15,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 200 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 352 Unchecked, 0.1s Time] [2022-03-03 19:00:15,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-03-03 19:00:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 838. [2022-03-03 19:00:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.2353643966547194) internal successors, (2708), 837 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2708 transitions. [2022-03-03 19:00:15,373 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2708 transitions. Word has length 24 [2022-03-03 19:00:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:15,373 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 2708 transitions. [2022-03-03 19:00:15,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2708 transitions. [2022-03-03 19:00:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:15,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:15,375 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:15,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:15,591 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,SelfDestructingSolverStorable53 [2022-03-03 19:00:15,591 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash 604080769, now seen corresponding path program 39 times [2022-03-03 19:00:15,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:15,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604214943] [2022-03-03 19:00:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:15,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:15,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604214943] [2022-03-03 19:00:15,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604214943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:15,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470394193] [2022-03-03 19:00:15,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:00:15,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:15,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:15,784 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) [2022-03-03 19:00:15,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:00:15,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:15,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:00:15,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:15,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:15,989 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:00:16,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:16,093 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-03 19:00:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:16,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:16,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:16,677 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:00:16,856 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:16,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:00:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:16,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470394193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:16,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:16,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:16,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667737454] [2022-03-03 19:00:16,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:16,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:16,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:16,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:16,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:16,863 INFO L87 Difference]: Start difference. First operand 838 states and 2708 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:17,174 INFO L93 Difference]: Finished difference Result 956 states and 3033 transitions. [2022-03-03 19:00:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:00:17,175 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:17,176 INFO L225 Difference]: With dead ends: 956 [2022-03-03 19:00:17,176 INFO L226 Difference]: Without dead ends: 921 [2022-03-03 19:00:17,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:00:17,177 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:17,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 248 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 570 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-03-03 19:00:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-03-03 19:00:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 840. [2022-03-03 19:00:17,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.233611442193087) internal successors, (2713), 839 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2713 transitions. [2022-03-03 19:00:17,187 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2713 transitions. Word has length 24 [2022-03-03 19:00:17,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:17,187 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2713 transitions. [2022-03-03 19:00:17,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:17,187 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2713 transitions. [2022-03-03 19:00:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:17,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:17,189 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:17,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:17,389 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,SelfDestructingSolverStorable54 [2022-03-03 19:00:17,389 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1293090955, now seen corresponding path program 40 times [2022-03-03 19:00:17,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:17,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145691267] [2022-03-03 19:00:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:17,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:17,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:17,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145691267] [2022-03-03 19:00:17,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145691267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:17,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214329974] [2022-03-03 19:00:17,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:00:17,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:17,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:17,626 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) [2022-03-03 19:00:17,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:00:17,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:00:17,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:17,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:17,823 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 41 treesize of output 35 [2022-03-03 19:00:17,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:17,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:00:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:18,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:18,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:18,491 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 141 treesize of output 121 [2022-03-03 19:00:18,662 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:18,662 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 [2022-03-03 19:00:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:18,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214329974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:18,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:18,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:18,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592105103] [2022-03-03 19:00:18,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:18,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:18,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:18,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:18,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:18,668 INFO L87 Difference]: Start difference. First operand 840 states and 2713 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:18,899 INFO L93 Difference]: Finished difference Result 963 states and 3060 transitions. [2022-03-03 19:00:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:00:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:18,901 INFO L225 Difference]: With dead ends: 963 [2022-03-03 19:00:18,901 INFO L226 Difference]: Without dead ends: 932 [2022-03-03 19:00:18,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:18,901 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:18,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 286 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 571 Invalid, 0 Unknown, 224 Unchecked, 0.2s Time] [2022-03-03 19:00:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-03-03 19:00:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 840. [2022-03-03 19:00:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.233611442193087) internal successors, (2713), 839 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2713 transitions. [2022-03-03 19:00:18,912 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2713 transitions. Word has length 24 [2022-03-03 19:00:18,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:18,912 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2713 transitions. [2022-03-03 19:00:18,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2713 transitions. [2022-03-03 19:00:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:18,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:18,913 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:18,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:19,123 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,SelfDestructingSolverStorable55 [2022-03-03 19:00:19,123 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash -439998855, now seen corresponding path program 41 times [2022-03-03 19:00:19,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:19,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047405906] [2022-03-03 19:00:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:19,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:19,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:19,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047405906] [2022-03-03 19:00:19,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047405906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:19,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133891802] [2022-03-03 19:00:19,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:00:19,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:19,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:19,328 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) [2022-03-03 19:00:19,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:00:19,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:00:19,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:19,454 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 35 [2022-03-03 19:00:19,589 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 22 [2022-03-03 19:00:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:19,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:20,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:20,160 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 141 treesize of output 121 [2022-03-03 19:00:20,385 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:20,386 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 28 treesize of output 25 [2022-03-03 19:00:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:20,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133891802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:20,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:20,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:20,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958059332] [2022-03-03 19:00:20,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:20,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:20,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:20,390 INFO L87 Difference]: Start difference. First operand 840 states and 2713 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:21,463 INFO L93 Difference]: Finished difference Result 1136 states and 3534 transitions. [2022-03-03 19:00:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:00:21,463 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:21,465 INFO L225 Difference]: With dead ends: 1136 [2022-03-03 19:00:21,465 INFO L226 Difference]: Without dead ends: 1047 [2022-03-03 19:00:21,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:00:21,466 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 116 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:21,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 329 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:00:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-03-03 19:00:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 868. [2022-03-03 19:00:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.2341407151095733) internal successors, (2804), 867 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2804 transitions. [2022-03-03 19:00:21,477 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2804 transitions. Word has length 24 [2022-03-03 19:00:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:21,477 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2804 transitions. [2022-03-03 19:00:21,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2804 transitions. [2022-03-03 19:00:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:21,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:21,479 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:21,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:21,679 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,SelfDestructingSolverStorable56 [2022-03-03 19:00:21,680 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:21,680 INFO L85 PathProgramCache]: Analyzing trace with hash 723934319, now seen corresponding path program 42 times [2022-03-03 19:00:21,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:21,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90986330] [2022-03-03 19:00:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:21,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:21,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:21,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90986330] [2022-03-03 19:00:21,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90986330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:21,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188997726] [2022-03-03 19:00:21,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:00:21,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:21,966 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) [2022-03-03 19:00:21,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:00:21,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:00:21,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:22,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:22,149 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 [2022-03-03 19:00:22,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:22,276 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 47 treesize of output 41 [2022-03-03 19:00:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:22,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:22,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:22,893 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 141 treesize of output 121 [2022-03-03 19:00:23,068 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:23,069 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 25 [2022-03-03 19:00:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:23,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188997726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:23,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:23,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:23,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628217612] [2022-03-03 19:00:23,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:23,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:23,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:23,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:23,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:23,074 INFO L87 Difference]: Start difference. First operand 868 states and 2804 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:23,344 INFO L93 Difference]: Finished difference Result 980 states and 3135 transitions. [2022-03-03 19:00:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:00:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:23,346 INFO L225 Difference]: With dead ends: 980 [2022-03-03 19:00:23,346 INFO L226 Difference]: Without dead ends: 945 [2022-03-03 19:00:23,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:23,347 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:23,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 281 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 678 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-03-03 19:00:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-03-03 19:00:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 871. [2022-03-03 19:00:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2344827586206897) internal successors, (2814), 870 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2814 transitions. [2022-03-03 19:00:23,357 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2814 transitions. Word has length 24 [2022-03-03 19:00:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:23,357 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 2814 transitions. [2022-03-03 19:00:23,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2814 transitions. [2022-03-03 19:00:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:23,359 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:23,359 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:23,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:23,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:23,559 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -350679239, now seen corresponding path program 43 times [2022-03-03 19:00:23,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:23,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647962758] [2022-03-03 19:00:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:23,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:23,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647962758] [2022-03-03 19:00:23,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647962758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:23,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056972335] [2022-03-03 19:00:23,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:00:23,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:23,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:23,745 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) [2022-03-03 19:00:23,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:00:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:23,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:23,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:23,933 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 41 treesize of output 35 [2022-03-03 19:00:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:24,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22 [2022-03-03 19:00:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:24,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:24,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:24,861 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 141 treesize of output 121 [2022-03-03 19:00:25,023 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:25,024 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 28 treesize of output 25 [2022-03-03 19:00:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:25,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056972335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:25,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:25,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:25,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220154378] [2022-03-03 19:00:25,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:25,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:25,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:25,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:25,029 INFO L87 Difference]: Start difference. First operand 871 states and 2814 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:25,259 INFO L93 Difference]: Finished difference Result 974 states and 3124 transitions. [2022-03-03 19:00:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:00:25,259 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:25,261 INFO L225 Difference]: With dead ends: 974 [2022-03-03 19:00:25,261 INFO L226 Difference]: Without dead ends: 943 [2022-03-03 19:00:25,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:00:25,261 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:25,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 196 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 463 Invalid, 0 Unknown, 146 Unchecked, 0.2s Time] [2022-03-03 19:00:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-03-03 19:00:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 874. [2022-03-03 19:00:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.2348224513172967) internal successors, (2824), 873 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2824 transitions. [2022-03-03 19:00:25,272 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2824 transitions. Word has length 24 [2022-03-03 19:00:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:25,272 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 2824 transitions. [2022-03-03 19:00:25,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2824 transitions. [2022-03-03 19:00:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:25,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:25,273 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:25,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:25,473 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,SelfDestructingSolverStorable58 [2022-03-03 19:00:25,474 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1007607403, now seen corresponding path program 44 times [2022-03-03 19:00:25,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:25,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307073545] [2022-03-03 19:00:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:25,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:25,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:25,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307073545] [2022-03-03 19:00:25,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307073545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:25,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975925670] [2022-03-03 19:00:25,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:00:25,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:25,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:25,660 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) [2022-03-03 19:00:25,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:00:25,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:00:25,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:25,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:25,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:25,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:25,834 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 [2022-03-03 19:00:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:25,889 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-03 19:00:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:26,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:26,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:26,755 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 80 treesize of output 73 [2022-03-03 19:00:26,871 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:26,871 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:00:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:26,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975925670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:26,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:26,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:00:26,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114197370] [2022-03-03 19:00:26,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:26,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:00:26,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:00:26,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:00:26,877 INFO L87 Difference]: Start difference. First operand 874 states and 2824 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:27,248 INFO L93 Difference]: Finished difference Result 968 states and 3089 transitions. [2022-03-03 19:00:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:00:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:27,250 INFO L225 Difference]: With dead ends: 968 [2022-03-03 19:00:27,250 INFO L226 Difference]: Without dead ends: 923 [2022-03-03 19:00:27,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:00:27,250 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:27,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 137 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 351 Invalid, 0 Unknown, 203 Unchecked, 0.2s Time] [2022-03-03 19:00:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-03-03 19:00:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 877. [2022-03-03 19:00:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.2351598173515983) internal successors, (2834), 876 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2834 transitions. [2022-03-03 19:00:27,261 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2834 transitions. Word has length 24 [2022-03-03 19:00:27,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:27,261 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 2834 transitions. [2022-03-03 19:00:27,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2834 transitions. [2022-03-03 19:00:27,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:27,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:27,262 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:27,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-03 19:00:27,462 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,SelfDestructingSolverStorable59 [2022-03-03 19:00:27,463 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:27,463 INFO L85 PathProgramCache]: Analyzing trace with hash -156834861, now seen corresponding path program 45 times [2022-03-03 19:00:27,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:27,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750955240] [2022-03-03 19:00:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:27,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:27,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:27,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750955240] [2022-03-03 19:00:27,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750955240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:27,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004434058] [2022-03-03 19:00:27,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:00:27,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:27,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:27,648 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) [2022-03-03 19:00:27,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:00:27,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:00:27,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:27,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:27,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:27,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:27,837 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 41 treesize of output 35 [2022-03-03 19:00:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:27,889 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-03 19:00:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:28,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:28,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:28,624 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 80 treesize of output 73 [2022-03-03 19:00:28,786 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:28,786 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 25 [2022-03-03 19:00:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:28,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004434058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:28,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:28,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:00:28,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582657698] [2022-03-03 19:00:28,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:28,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:00:28,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:28,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:00:28,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:00:28,792 INFO L87 Difference]: Start difference. First operand 877 states and 2834 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-03-03 19:00:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:29,906 INFO L93 Difference]: Finished difference Result 1232 states and 3740 transitions. [2022-03-03 19:00:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:00:29,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 24 [2022-03-03 19:00:29,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:29,908 INFO L225 Difference]: With dead ends: 1232 [2022-03-03 19:00:29,908 INFO L226 Difference]: Without dead ends: 1103 [2022-03-03 19:00:29,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:00:29,909 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 194 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:29,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 308 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 746 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-03-03 19:00:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-03-03 19:00:29,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 900. [2022-03-03 19:00:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.2235817575083425) internal successors, (2898), 899 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2898 transitions. [2022-03-03 19:00:29,921 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2898 transitions. Word has length 24 [2022-03-03 19:00:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:29,921 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2898 transitions. [2022-03-03 19:00:29,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2022-03-03 19:00:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2898 transitions. [2022-03-03 19:00:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:29,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:29,922 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:29,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-03 19:00:30,123 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,SelfDestructingSolverStorable60 [2022-03-03 19:00:30,124 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:30,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash -863130261, now seen corresponding path program 46 times [2022-03-03 19:00:30,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:30,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014971343] [2022-03-03 19:00:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:00:30,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:30,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014971343] [2022-03-03 19:00:30,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014971343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:30,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711138582] [2022-03-03 19:00:30,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:00:30,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:30,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:30,359 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) [2022-03-03 19:00:30,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:00:30,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:00:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:00:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:30,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:30,535 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 [2022-03-03 19:00:30,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:30,598 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 47 treesize of output 41 [2022-03-03 19:00:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:00:30,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:31,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:31,524 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 102 treesize of output 90 [2022-03-03 19:00:31,762 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:31,763 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 32 treesize of output 29 [2022-03-03 19:00:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:00:31,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711138582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:31,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:31,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:00:31,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707487227] [2022-03-03 19:00:31,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:31,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:00:31,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:00:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:00:31,769 INFO L87 Difference]: Start difference. First operand 900 states and 2898 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:33,351 INFO L93 Difference]: Finished difference Result 1826 states and 5309 transitions. [2022-03-03 19:00:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:00:33,351 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:33,354 INFO L225 Difference]: With dead ends: 1826 [2022-03-03 19:00:33,354 INFO L226 Difference]: Without dead ends: 1619 [2022-03-03 19:00:33,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=258, Invalid=1382, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:00:33,354 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 170 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:33,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 491 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1052 Invalid, 0 Unknown, 241 Unchecked, 0.5s Time] [2022-03-03 19:00:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-03-03 19:00:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 900. [2022-03-03 19:00:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.2235817575083425) internal successors, (2898), 899 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2898 transitions. [2022-03-03 19:00:33,369 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2898 transitions. Word has length 24 [2022-03-03 19:00:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:33,369 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2898 transitions. [2022-03-03 19:00:33,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2898 transitions. [2022-03-03 19:00:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:33,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:33,371 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:33,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:33,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:33,571 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1796429725, now seen corresponding path program 47 times [2022-03-03 19:00:33,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:33,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593436401] [2022-03-03 19:00:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:33,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:33,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:33,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593436401] [2022-03-03 19:00:33,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593436401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:33,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191701005] [2022-03-03 19:00:33,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:00:33,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:33,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:33,744 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) [2022-03-03 19:00:33,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:00:33,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:00:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:33,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:33,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:33,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:00:34,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:34,003 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 21 treesize of output 17 [2022-03-03 19:00:34,005 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 11 treesize of output 7 [2022-03-03 19:00:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:34,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:34,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:34,578 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-03 19:00:34,729 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:34,729 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 28 treesize of output 25 [2022-03-03 19:00:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:34,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191701005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:34,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:34,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:34,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789845417] [2022-03-03 19:00:34,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:34,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:34,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:34,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:34,734 INFO L87 Difference]: Start difference. First operand 900 states and 2898 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:34,968 INFO L93 Difference]: Finished difference Result 1056 states and 3329 transitions. [2022-03-03 19:00:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:00:34,969 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:34,970 INFO L225 Difference]: With dead ends: 1056 [2022-03-03 19:00:34,970 INFO L226 Difference]: Without dead ends: 973 [2022-03-03 19:00:34,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:00:34,971 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:34,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 250 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 353 Invalid, 0 Unknown, 410 Unchecked, 0.1s Time] [2022-03-03 19:00:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-03-03 19:00:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 914. [2022-03-03 19:00:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 3.2201533406352683) internal successors, (2940), 913 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2940 transitions. [2022-03-03 19:00:34,981 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2940 transitions. Word has length 24 [2022-03-03 19:00:34,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:34,982 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2940 transitions. [2022-03-03 19:00:34,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2940 transitions. [2022-03-03 19:00:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:34,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:34,983 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:34,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:35,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:35,187 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:35,188 INFO L85 PathProgramCache]: Analyzing trace with hash 54595079, now seen corresponding path program 48 times [2022-03-03 19:00:35,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:35,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958004230] [2022-03-03 19:00:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:35,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:35,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:35,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958004230] [2022-03-03 19:00:35,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958004230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:35,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785267916] [2022-03-03 19:00:35,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:00:35,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:35,356 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) [2022-03-03 19:00:35,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:00:35,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:00:35,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:35,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:35,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:35,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:35,556 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 23 treesize of output 19 [2022-03-03 19:00:35,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:35,692 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 26 treesize of output 22 [2022-03-03 19:00:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:35,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:36,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:36,357 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:00:36,560 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:36,561 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 [2022-03-03 19:00:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:36,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785267916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:36,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:36,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:00:36,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743201783] [2022-03-03 19:00:36,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:36,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:00:36,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:00:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:00:36,566 INFO L87 Difference]: Start difference. First operand 914 states and 2940 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:00:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:36,786 INFO L93 Difference]: Finished difference Result 1012 states and 3229 transitions. [2022-03-03 19:00:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:00:36,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:00:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:36,788 INFO L225 Difference]: With dead ends: 1012 [2022-03-03 19:00:36,788 INFO L226 Difference]: Without dead ends: 981 [2022-03-03 19:00:36,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:00:36,789 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:36,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 228 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 507 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-03-03 19:00:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-03-03 19:00:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 914. [2022-03-03 19:00:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 3.2201533406352683) internal successors, (2940), 913 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:36,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2940 transitions. [2022-03-03 19:00:36,800 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2940 transitions. Word has length 24 [2022-03-03 19:00:36,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:36,800 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2940 transitions. [2022-03-03 19:00:36,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:00:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2940 transitions. [2022-03-03 19:00:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:36,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:36,801 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:36,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-03 19:00:37,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:37,018 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:37,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1571040017, now seen corresponding path program 49 times [2022-03-03 19:00:37,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:37,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397225496] [2022-03-03 19:00:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:37,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:37,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:37,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397225496] [2022-03-03 19:00:37,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397225496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:37,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561282874] [2022-03-03 19:00:37,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:00:37,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:37,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:37,180 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) [2022-03-03 19:00:37,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:00:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:37,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:00:37,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:37,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:37,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:00:37,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:37,510 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 [2022-03-03 19:00:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:37,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:37,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:37,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 90 [2022-03-03 19:00:38,275 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:38,275 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 32 treesize of output 29 [2022-03-03 19:00:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:38,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561282874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:38,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:38,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:00:38,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824374274] [2022-03-03 19:00:38,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:38,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:00:38,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:38,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:00:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:00:38,281 INFO L87 Difference]: Start difference. First operand 914 states and 2940 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:39,043 INFO L93 Difference]: Finished difference Result 1286 states and 3940 transitions. [2022-03-03 19:00:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:00:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:39,045 INFO L225 Difference]: With dead ends: 1286 [2022-03-03 19:00:39,045 INFO L226 Difference]: Without dead ends: 1133 [2022-03-03 19:00:39,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:00:39,046 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 153 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:39,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 208 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 472 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-03-03 19:00:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-03 19:00:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 921. [2022-03-03 19:00:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.226086956521739) internal successors, (2968), 920 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2968 transitions. [2022-03-03 19:00:39,059 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2968 transitions. Word has length 24 [2022-03-03 19:00:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:39,059 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 2968 transitions. [2022-03-03 19:00:39,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2968 transitions. [2022-03-03 19:00:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:39,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:39,060 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:39,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:39,271 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,SelfDestructingSolverStorable64 [2022-03-03 19:00:39,271 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:39,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash -984124415, now seen corresponding path program 50 times [2022-03-03 19:00:39,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:39,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388713265] [2022-03-03 19:00:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:39,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:39,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:39,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388713265] [2022-03-03 19:00:39,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388713265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:39,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820172813] [2022-03-03 19:00:39,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:00:39,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:39,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:39,402 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) [2022-03-03 19:00:39,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:00:39,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:00:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:39,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:39,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:39,663 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 23 treesize of output 19 [2022-03-03 19:00:39,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:39,724 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 29 treesize of output 23 [2022-03-03 19:00:39,726 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 22 treesize of output 14 [2022-03-03 19:00:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:39,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:40,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:40,133 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:00:40,341 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:40,342 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:00:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:40,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820172813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:40,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:40,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:00:40,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248452532] [2022-03-03 19:00:40,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:40,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:00:40,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:40,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:00:40,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:00:40,359 INFO L87 Difference]: Start difference. First operand 921 states and 2968 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:00:40,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:40,519 INFO L93 Difference]: Finished difference Result 1032 states and 3276 transitions. [2022-03-03 19:00:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:00:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:00:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:40,521 INFO L225 Difference]: With dead ends: 1032 [2022-03-03 19:00:40,521 INFO L226 Difference]: Without dead ends: 1025 [2022-03-03 19:00:40,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:00:40,521 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:40,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 206 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-03-03 19:00:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-03-03 19:00:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 955. [2022-03-03 19:00:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.2243186582809225) internal successors, (3076), 954 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3076 transitions. [2022-03-03 19:00:40,532 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3076 transitions. Word has length 24 [2022-03-03 19:00:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:40,532 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 3076 transitions. [2022-03-03 19:00:40,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:00:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3076 transitions. [2022-03-03 19:00:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:40,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:40,534 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:40,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:40,734 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,SelfDestructingSolverStorable65 [2022-03-03 19:00:40,735 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1766477441, now seen corresponding path program 51 times [2022-03-03 19:00:40,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:40,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225284624] [2022-03-03 19:00:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:40,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:40,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:40,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225284624] [2022-03-03 19:00:40,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225284624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:40,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500017092] [2022-03-03 19:00:40,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:00:40,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:40,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:40,890 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) [2022-03-03 19:00:40,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:00:40,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:00:40,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:40,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:00:40,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:41,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:41,154 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:00:41,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:41,214 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 29 treesize of output 23 [2022-03-03 19:00:41,216 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 22 treesize of output 14 [2022-03-03 19:00:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:41,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:41,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:41,636 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 115 treesize of output 101 [2022-03-03 19:00:41,897 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:41,897 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 32 treesize of output 29 [2022-03-03 19:00:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:41,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500017092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:41,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:41,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:41,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96103360] [2022-03-03 19:00:41,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:41,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:41,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:41,902 INFO L87 Difference]: Start difference. First operand 955 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:42,084 INFO L93 Difference]: Finished difference Result 1083 states and 3425 transitions. [2022-03-03 19:00:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:00:42,084 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:42,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:42,086 INFO L225 Difference]: With dead ends: 1083 [2022-03-03 19:00:42,086 INFO L226 Difference]: Without dead ends: 1023 [2022-03-03 19:00:42,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:00:42,086 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:42,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 184 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 392 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-03-03 19:00:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-03-03 19:00:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 949. [2022-03-03 19:00:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 3.2056962025316458) internal successors, (3039), 948 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 3039 transitions. [2022-03-03 19:00:42,097 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 3039 transitions. Word has length 24 [2022-03-03 19:00:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:42,097 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 3039 transitions. [2022-03-03 19:00:42,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 3039 transitions. [2022-03-03 19:00:42,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:42,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:42,099 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:42,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:42,299 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,SelfDestructingSolverStorable66 [2022-03-03 19:00:42,299 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1659506343, now seen corresponding path program 52 times [2022-03-03 19:00:42,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:42,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798431105] [2022-03-03 19:00:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:42,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:42,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:42,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798431105] [2022-03-03 19:00:42,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798431105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:42,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234115580] [2022-03-03 19:00:42,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:00:42,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:42,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:42,498 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) [2022-03-03 19:00:42,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:00:42,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:00:42,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:42,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:00:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:42,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:42,778 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 23 treesize of output 19 [2022-03-03 19:00:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:42,865 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 29 treesize of output 23 [2022-03-03 19:00:42,868 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 22 treesize of output 14 [2022-03-03 19:00:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:42,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:43,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:43,242 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-03 19:00:43,519 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:43,520 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-03 19:00:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:43,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234115580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:43,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:43,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:43,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951259154] [2022-03-03 19:00:43,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:43,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:43,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:43,525 INFO L87 Difference]: Start difference. First operand 949 states and 3039 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:43,622 INFO L93 Difference]: Finished difference Result 1006 states and 3179 transitions. [2022-03-03 19:00:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:00:43,622 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:43,624 INFO L225 Difference]: With dead ends: 1006 [2022-03-03 19:00:43,624 INFO L226 Difference]: Without dead ends: 999 [2022-03-03 19:00:43,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:43,624 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:43,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 149 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 226 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-03-03 19:00:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-03-03 19:00:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 949. [2022-03-03 19:00:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 3.2046413502109705) internal successors, (3038), 948 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 3038 transitions. [2022-03-03 19:00:43,636 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 3038 transitions. Word has length 24 [2022-03-03 19:00:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:43,636 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 3038 transitions. [2022-03-03 19:00:43,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 3038 transitions. [2022-03-03 19:00:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:43,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:43,638 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:43,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-03 19:00:43,851 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,SelfDestructingSolverStorable67 [2022-03-03 19:00:43,851 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:43,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1573864675, now seen corresponding path program 53 times [2022-03-03 19:00:43,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:43,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073416055] [2022-03-03 19:00:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:43,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:43,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:43,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073416055] [2022-03-03 19:00:43,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073416055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:43,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003747915] [2022-03-03 19:00:43,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:00:43,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:43,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:43,998 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) [2022-03-03 19:00:43,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:00:44,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:00:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:44,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:44,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:44,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:44,237 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 23 treesize of output 19 [2022-03-03 19:00:44,292 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 [2022-03-03 19:00:44,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:44,294 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 12 treesize of output 8 [2022-03-03 19:00:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:44,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:44,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:44,676 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 84 treesize of output 75 [2022-03-03 19:00:44,837 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:44,837 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 28 treesize of output 25 [2022-03-03 19:00:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:44,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003747915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:44,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:44,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:00:44,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937736294] [2022-03-03 19:00:44,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:44,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:00:44,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:00:44,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:00:44,843 INFO L87 Difference]: Start difference. First operand 949 states and 3038 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:44,926 INFO L93 Difference]: Finished difference Result 1011 states and 3192 transitions. [2022-03-03 19:00:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:00:44,927 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:44,928 INFO L225 Difference]: With dead ends: 1011 [2022-03-03 19:00:44,928 INFO L226 Difference]: Without dead ends: 1004 [2022-03-03 19:00:44,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:00:44,928 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:44,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 157 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 204 Unchecked, 0.1s Time] [2022-03-03 19:00:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-03-03 19:00:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 955. [2022-03-03 19:00:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.1949685534591197) internal successors, (3048), 954 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3048 transitions. [2022-03-03 19:00:44,939 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3048 transitions. Word has length 24 [2022-03-03 19:00:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:44,939 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 3048 transitions. [2022-03-03 19:00:44,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3048 transitions. [2022-03-03 19:00:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:44,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:44,941 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:44,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-03 19:00:45,141 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,SelfDestructingSolverStorable68 [2022-03-03 19:00:45,141 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 898482747, now seen corresponding path program 54 times [2022-03-03 19:00:45,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:45,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747952831] [2022-03-03 19:00:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:45,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:45,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:45,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747952831] [2022-03-03 19:00:45,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747952831] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:45,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530655974] [2022-03-03 19:00:45,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:00:45,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:45,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:45,287 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) [2022-03-03 19:00:45,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:00:45,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:00:45,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:00:45,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:45,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:45,550 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 23 treesize of output 19 [2022-03-03 19:00:45,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:45,635 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 29 treesize of output 23 [2022-03-03 19:00:45,637 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 [2022-03-03 19:00:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:45,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:46,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:46,030 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 115 treesize of output 101 [2022-03-03 19:00:46,319 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:46,319 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 32 treesize of output 29 [2022-03-03 19:00:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:46,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530655974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:46,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:46,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:00:46,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397233173] [2022-03-03 19:00:46,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:46,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:00:46,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:46,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:00:46,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:00:46,324 INFO L87 Difference]: Start difference. First operand 955 states and 3048 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:46,440 INFO L93 Difference]: Finished difference Result 1069 states and 3327 transitions. [2022-03-03 19:00:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:00:46,441 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:46,442 INFO L225 Difference]: With dead ends: 1069 [2022-03-03 19:00:46,442 INFO L226 Difference]: Without dead ends: 999 [2022-03-03 19:00:46,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:00:46,443 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:46,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 185 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-03-03 19:00:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-03-03 19:00:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 960. [2022-03-03 19:00:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.1939520333680917) internal successors, (3063), 959 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3063 transitions. [2022-03-03 19:00:46,474 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3063 transitions. Word has length 24 [2022-03-03 19:00:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:46,474 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3063 transitions. [2022-03-03 19:00:46,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3063 transitions. [2022-03-03 19:00:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:46,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:46,475 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:46,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:46,676 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,SelfDestructingSolverStorable69 [2022-03-03 19:00:46,676 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:46,677 INFO L85 PathProgramCache]: Analyzing trace with hash 691674781, now seen corresponding path program 55 times [2022-03-03 19:00:46,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:46,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059538107] [2022-03-03 19:00:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:46,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:00:46,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:46,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059538107] [2022-03-03 19:00:46,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059538107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:46,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856968079] [2022-03-03 19:00:46,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:00:46,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:46,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:46,859 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) [2022-03-03 19:00:46,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:00:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:46,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:47,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:47,105 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:00:47,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:47,228 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 29 treesize of output 23 [2022-03-03 19:00:47,230 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 22 treesize of output 14 [2022-03-03 19:00:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:00:47,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:47,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:47,693 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:00:47,958 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:47,958 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 28 treesize of output 25 [2022-03-03 19:00:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:00:47,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856968079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:47,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:47,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:47,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879782833] [2022-03-03 19:00:47,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:47,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:47,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:47,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:47,964 INFO L87 Difference]: Start difference. First operand 960 states and 3063 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:48,028 INFO L93 Difference]: Finished difference Result 1057 states and 3308 transitions. [2022-03-03 19:00:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:00:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:48,030 INFO L225 Difference]: With dead ends: 1057 [2022-03-03 19:00:48,030 INFO L226 Difference]: Without dead ends: 1051 [2022-03-03 19:00:48,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:48,030 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:48,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 314 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 241 Unchecked, 0.1s Time] [2022-03-03 19:00:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-03-03 19:00:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 974. [2022-03-03 19:00:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 3.1819116135662897) internal successors, (3096), 973 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 3096 transitions. [2022-03-03 19:00:48,042 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 3096 transitions. Word has length 24 [2022-03-03 19:00:48,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:48,042 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 3096 transitions. [2022-03-03 19:00:48,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 3096 transitions. [2022-03-03 19:00:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:48,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:48,044 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:48,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:48,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:48,244 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1508291195, now seen corresponding path program 56 times [2022-03-03 19:00:48,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:48,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359873587] [2022-03-03 19:00:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:48,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:00:48,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:48,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359873587] [2022-03-03 19:00:48,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359873587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:48,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751538913] [2022-03-03 19:00:48,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:00:48,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:48,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:48,441 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) [2022-03-03 19:00:48,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:00:48,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:00:48,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:48,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:48,721 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 23 treesize of output 19 [2022-03-03 19:00:48,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:48,816 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 29 treesize of output 23 [2022-03-03 19:00:48,818 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 [2022-03-03 19:00:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:00:48,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:49,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:49,292 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 141 treesize of output 121 [2022-03-03 19:00:49,486 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:49,486 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 28 treesize of output 25 [2022-03-03 19:00:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:00:49,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751538913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:49,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:49,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:00:49,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905053631] [2022-03-03 19:00:49,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:49,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:00:49,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:00:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:00:49,491 INFO L87 Difference]: Start difference. First operand 974 states and 3096 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-03-03 19:00:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:49,621 INFO L93 Difference]: Finished difference Result 1107 states and 3480 transitions. [2022-03-03 19:00:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:00:49,621 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 24 [2022-03-03 19:00:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:49,623 INFO L225 Difference]: With dead ends: 1107 [2022-03-03 19:00:49,623 INFO L226 Difference]: Without dead ends: 1076 [2022-03-03 19:00:49,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:00:49,624 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 458 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:49,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 201 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 311 Invalid, 0 Unknown, 458 Unchecked, 0.1s Time] [2022-03-03 19:00:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-03 19:00:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 961. [2022-03-03 19:00:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 3.2020833333333334) internal successors, (3074), 960 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 3074 transitions. [2022-03-03 19:00:49,639 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 3074 transitions. Word has length 24 [2022-03-03 19:00:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:49,640 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 3074 transitions. [2022-03-03 19:00:49,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-03-03 19:00:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 3074 transitions. [2022-03-03 19:00:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:49,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:49,641 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:49,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:49,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:49,857 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2142166499, now seen corresponding path program 57 times [2022-03-03 19:00:49,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:49,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434650310] [2022-03-03 19:00:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:49,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:50,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:50,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434650310] [2022-03-03 19:00:50,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434650310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:50,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182162651] [2022-03-03 19:00:50,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:00:50,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:50,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:50,089 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) [2022-03-03 19:00:50,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:00:50,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:00:50,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:00:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:50,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:50,276 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 41 treesize of output 35 [2022-03-03 19:00:50,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:50,340 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 43 treesize of output 37 [2022-03-03 19:00:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:50,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:51,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:51,186 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 102 treesize of output 90 [2022-03-03 19:00:51,380 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:51,380 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 32 treesize of output 29 [2022-03-03 19:00:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:51,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182162651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:51,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:51,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:00:51,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380120530] [2022-03-03 19:00:51,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:51,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:00:51,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:51,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:00:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:00:51,386 INFO L87 Difference]: Start difference. First operand 961 states and 3074 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:51,773 INFO L93 Difference]: Finished difference Result 1056 states and 3343 transitions. [2022-03-03 19:00:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:00:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:51,775 INFO L225 Difference]: With dead ends: 1056 [2022-03-03 19:00:51,775 INFO L226 Difference]: Without dead ends: 1011 [2022-03-03 19:00:51,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:00:51,775 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:51,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 240 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 616 Invalid, 0 Unknown, 306 Unchecked, 0.3s Time] [2022-03-03 19:00:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-03-03 19:00:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 962. [2022-03-03 19:00:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 3.202913631633715) internal successors, (3078), 961 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 3078 transitions. [2022-03-03 19:00:51,786 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 3078 transitions. Word has length 24 [2022-03-03 19:00:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:51,786 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 3078 transitions. [2022-03-03 19:00:51,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 3078 transitions. [2022-03-03 19:00:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:51,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:51,788 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:51,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-03 19:00:51,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:51,989 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:51,989 INFO L85 PathProgramCache]: Analyzing trace with hash 977724235, now seen corresponding path program 58 times [2022-03-03 19:00:51,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:51,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513717683] [2022-03-03 19:00:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:51,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:52,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:52,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513717683] [2022-03-03 19:00:52,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513717683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:52,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099213318] [2022-03-03 19:00:52,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:00:52,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:52,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:52,163 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) [2022-03-03 19:00:52,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:00:52,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:00:52,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:00:52,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:52,288 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 35 [2022-03-03 19:00:52,337 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 43 treesize of output 37 [2022-03-03 19:00:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:52,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:53,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:53,066 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 110 treesize of output 98 [2022-03-03 19:00:53,262 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:53,262 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-03 19:00:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:53,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099213318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:53,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:53,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:00:53,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36656742] [2022-03-03 19:00:53,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:53,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:00:53,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:53,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:00:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:00:53,266 INFO L87 Difference]: Start difference. First operand 962 states and 3078 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:56,978 INFO L93 Difference]: Finished difference Result 1982 states and 5725 transitions. [2022-03-03 19:00:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:00:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:00:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:56,981 INFO L225 Difference]: With dead ends: 1982 [2022-03-03 19:00:56,981 INFO L226 Difference]: Without dead ends: 1740 [2022-03-03 19:00:56,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=665, Invalid=3367, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 19:00:56,981 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 336 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:56,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 477 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:00:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-03-03 19:00:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 996. [2022-03-03 19:00:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.244221105527638) internal successors, (3228), 995 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3228 transitions. [2022-03-03 19:00:56,996 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3228 transitions. Word has length 24 [2022-03-03 19:00:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:56,997 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 3228 transitions. [2022-03-03 19:00:56,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3228 transitions. [2022-03-03 19:00:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:56,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:56,998 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:57,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 19:00:57,211 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,SelfDestructingSolverStorable73 [2022-03-03 19:00:57,211 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1043741095, now seen corresponding path program 59 times [2022-03-03 19:00:57,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:57,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519613343] [2022-03-03 19:00:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:57,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:57,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519613343] [2022-03-03 19:00:57,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519613343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:57,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555798324] [2022-03-03 19:00:57,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:00:57,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:57,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:57,553 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) [2022-03-03 19:00:57,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:00:57,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:00:57,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:57,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:57,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:57,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:57,775 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 41 treesize of output 35 [2022-03-03 19:00:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:57,826 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 43 treesize of output 37 [2022-03-03 19:00:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:57,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:00:58,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:00:58,513 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 73 treesize of output 66 [2022-03-03 19:00:58,682 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:00:58,682 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 25 [2022-03-03 19:00:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:58,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555798324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:00:58,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:00:58,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:00:58,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087360096] [2022-03-03 19:00:58,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:00:58,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:00:58,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:00:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:00:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:00:58,688 INFO L87 Difference]: Start difference. First operand 996 states and 3228 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:00:58,958 INFO L93 Difference]: Finished difference Result 1086 states and 3482 transitions. [2022-03-03 19:00:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:00:58,959 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:00:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:00:58,960 INFO L225 Difference]: With dead ends: 1086 [2022-03-03 19:00:58,960 INFO L226 Difference]: Without dead ends: 1067 [2022-03-03 19:00:58,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:00:58,961 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:00:58,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 203 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 472 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2022-03-03 19:00:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-03-03 19:00:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 996. [2022-03-03 19:00:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.244221105527638) internal successors, (3228), 995 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:00:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3228 transitions. [2022-03-03 19:00:58,972 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3228 transitions. Word has length 24 [2022-03-03 19:00:58,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:00:58,972 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 3228 transitions. [2022-03-03 19:00:58,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:00:58,972 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3228 transitions. [2022-03-03 19:00:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:00:58,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:00:58,974 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:00:58,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-03 19:00:59,174 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,SelfDestructingSolverStorable74 [2022-03-03 19:00:59,174 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:00:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:00:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2026645785, now seen corresponding path program 60 times [2022-03-03 19:00:59,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:00:59,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519567791] [2022-03-03 19:00:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:00:59,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:00:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:00:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:59,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:00:59,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519567791] [2022-03-03 19:00:59,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519567791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:00:59,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156750800] [2022-03-03 19:00:59,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:00:59,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:00:59,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:00:59,423 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) [2022-03-03 19:00:59,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:00:59,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:00:59,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:00:59,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:00:59,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:00:59,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:59,606 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 41 treesize of output 35 [2022-03-03 19:00:59,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:00:59,724 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 24 treesize of output 20 [2022-03-03 19:00:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:00:59,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:00,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:00,492 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-03 19:01:00,707 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:00,707 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 28 treesize of output 25 [2022-03-03 19:01:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:00,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156750800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:00,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:00,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:00,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501029284] [2022-03-03 19:01:00,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:00,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:00,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:00,713 INFO L87 Difference]: Start difference. First operand 996 states and 3228 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:01,253 INFO L93 Difference]: Finished difference Result 1179 states and 3728 transitions. [2022-03-03 19:01:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:01:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:01:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:01,256 INFO L225 Difference]: With dead ends: 1179 [2022-03-03 19:01:01,256 INFO L226 Difference]: Without dead ends: 1141 [2022-03-03 19:01:01,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:01:01,256 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:01,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 216 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 478 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-03-03 19:01:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-03-03 19:01:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1004. [2022-03-03 19:01:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.255234297108674) internal successors, (3265), 1003 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3265 transitions. [2022-03-03 19:01:01,269 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3265 transitions. Word has length 24 [2022-03-03 19:01:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:01,269 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 3265 transitions. [2022-03-03 19:01:01,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3265 transitions. [2022-03-03 19:01:01,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:01,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:01,270 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:01,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:01,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:01,491 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1602563421, now seen corresponding path program 61 times [2022-03-03 19:01:01,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:01,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225346471] [2022-03-03 19:01:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:01:01,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:01,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225346471] [2022-03-03 19:01:01,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225346471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:01,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601374060] [2022-03-03 19:01:01,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:01:01,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:01,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:01,716 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) [2022-03-03 19:01:01,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:01:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:01,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:01,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:01,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:01,902 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:01:02,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:02,031 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 24 treesize of output 20 [2022-03-03 19:01:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:01:02,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:02,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:02,823 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:01:03,017 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:03,017 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:01:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:01:03,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601374060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:03,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:03,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:03,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276368072] [2022-03-03 19:01:03,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:03,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:03,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:03,023 INFO L87 Difference]: Start difference. First operand 1004 states and 3265 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:03,194 INFO L93 Difference]: Finished difference Result 1102 states and 3542 transitions. [2022-03-03 19:01:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:01:03,194 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:03,196 INFO L225 Difference]: With dead ends: 1102 [2022-03-03 19:01:03,196 INFO L226 Difference]: Without dead ends: 1083 [2022-03-03 19:01:03,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:01:03,196 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:03,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 141 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 377 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-03-03 19:01:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-03-03 19:01:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1001. [2022-03-03 19:01:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.249) internal successors, (3249), 1000 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3249 transitions. [2022-03-03 19:01:03,216 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3249 transitions. Word has length 24 [2022-03-03 19:01:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:03,216 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 3249 transitions. [2022-03-03 19:01:03,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3249 transitions. [2022-03-03 19:01:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:03,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:03,217 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:03,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-03 19:01:03,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:03,418 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1585837939, now seen corresponding path program 62 times [2022-03-03 19:01:03,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:03,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169192581] [2022-03-03 19:01:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:03,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:03,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:03,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169192581] [2022-03-03 19:01:03,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169192581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:03,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662651910] [2022-03-03 19:01:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:01:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:03,634 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) [2022-03-03 19:01:03,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:01:03,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:01:03,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:03,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:03,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:03,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:03,812 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 [2022-03-03 19:01:03,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:03,972 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 24 treesize of output 20 [2022-03-03 19:01:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:04,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:04,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:04,727 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 141 treesize of output 121 [2022-03-03 19:01:04,966 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:04,967 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:01:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:04,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662651910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:04,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:04,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:04,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930655744] [2022-03-03 19:01:04,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:04,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:04,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:04,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:04,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:04,974 INFO L87 Difference]: Start difference. First operand 1001 states and 3249 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:05,195 INFO L93 Difference]: Finished difference Result 1126 states and 3630 transitions. [2022-03-03 19:01:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:01:05,195 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:01:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:05,197 INFO L225 Difference]: With dead ends: 1126 [2022-03-03 19:01:05,197 INFO L226 Difference]: Without dead ends: 1107 [2022-03-03 19:01:05,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:01:05,197 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:05,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 206 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 514 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2022-03-03 19:01:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-03-03 19:01:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1004. [2022-03-03 19:01:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.25024925224327) internal successors, (3260), 1003 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3260 transitions. [2022-03-03 19:01:05,209 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3260 transitions. Word has length 24 [2022-03-03 19:01:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:05,209 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 3260 transitions. [2022-03-03 19:01:05,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3260 transitions. [2022-03-03 19:01:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:05,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:05,211 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:05,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-03 19:01:05,411 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,SelfDestructingSolverStorable77 [2022-03-03 19:01:05,411 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:05,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 478081611, now seen corresponding path program 63 times [2022-03-03 19:01:05,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:05,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119450415] [2022-03-03 19:01:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:05,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:05,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:05,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119450415] [2022-03-03 19:01:05,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119450415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:05,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535058875] [2022-03-03 19:01:05,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:01:05,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:05,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:05,583 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) [2022-03-03 19:01:05,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:01:05,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:01:05,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:05,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:05,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:05,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:05,767 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 41 treesize of output 35 [2022-03-03 19:01:05,914 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 [2022-03-03 19:01:05,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:05,916 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 12 treesize of output 3 [2022-03-03 19:01:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:05,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:06,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:06,457 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 80 treesize of output 71 [2022-03-03 19:01:06,575 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:06,575 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:01:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:06,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535058875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:06,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:06,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:01:06,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148425208] [2022-03-03 19:01:06,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:06,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:01:06,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:01:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:01:06,585 INFO L87 Difference]: Start difference. First operand 1004 states and 3260 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:06,896 INFO L93 Difference]: Finished difference Result 1164 states and 3683 transitions. [2022-03-03 19:01:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:01:06,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:06,899 INFO L225 Difference]: With dead ends: 1164 [2022-03-03 19:01:06,899 INFO L226 Difference]: Without dead ends: 1106 [2022-03-03 19:01:06,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:01:06,899 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:06,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 262 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 463 Invalid, 0 Unknown, 310 Unchecked, 0.2s Time] [2022-03-03 19:01:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-03-03 19:01:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1001. [2022-03-03 19:01:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.249) internal successors, (3249), 1000 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3249 transitions. [2022-03-03 19:01:06,917 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3249 transitions. Word has length 24 [2022-03-03 19:01:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:06,918 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 3249 transitions. [2022-03-03 19:01:06,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3249 transitions. [2022-03-03 19:01:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:06,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:06,919 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:06,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-03 19:01:07,120 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,SelfDestructingSolverStorable78 [2022-03-03 19:01:07,120 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash 682689027, now seen corresponding path program 64 times [2022-03-03 19:01:07,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:07,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542371830] [2022-03-03 19:01:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:07,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:07,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:07,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542371830] [2022-03-03 19:01:07,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542371830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:07,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896386802] [2022-03-03 19:01:07,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:01:07,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:07,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:07,263 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) [2022-03-03 19:01:07,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:01:07,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:01:07,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:07,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:07,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:07,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:07,449 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 41 treesize of output 35 [2022-03-03 19:01:07,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:07,571 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 24 treesize of output 20 [2022-03-03 19:01:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:07,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:08,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:08,091 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 141 treesize of output 121 [2022-03-03 19:01:08,303 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:08,303 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 28 treesize of output 25 [2022-03-03 19:01:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:08,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896386802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:08,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:08,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:01:08,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976050908] [2022-03-03 19:01:08,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:08,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:01:08,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:01:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:01:08,308 INFO L87 Difference]: Start difference. First operand 1001 states and 3249 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:08,614 INFO L93 Difference]: Finished difference Result 1164 states and 3695 transitions. [2022-03-03 19:01:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:01:08,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:08,616 INFO L225 Difference]: With dead ends: 1164 [2022-03-03 19:01:08,616 INFO L226 Difference]: Without dead ends: 1106 [2022-03-03 19:01:08,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:01:08,617 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:08,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 201 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 518 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-03-03 19:01:08,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-03-03 19:01:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1012. [2022-03-03 19:01:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 3.24431256181998) internal successors, (3280), 1011 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3280 transitions. [2022-03-03 19:01:08,629 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3280 transitions. Word has length 24 [2022-03-03 19:01:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:08,629 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3280 transitions. [2022-03-03 19:01:08,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3280 transitions. [2022-03-03 19:01:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:08,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:08,631 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:08,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:08,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:08,831 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:08,832 INFO L85 PathProgramCache]: Analyzing trace with hash -345769371, now seen corresponding path program 65 times [2022-03-03 19:01:08,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:08,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661090533] [2022-03-03 19:01:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:08,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:09,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:09,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661090533] [2022-03-03 19:01:09,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661090533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:09,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379979388] [2022-03-03 19:01:09,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:01:09,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:09,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:09,008 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) [2022-03-03 19:01:09,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:01:09,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:01:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:09,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:09,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:09,190 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:01:09,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:09,347 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 24 treesize of output 20 [2022-03-03 19:01:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:09,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:09,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:09,922 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 141 treesize of output 121 [2022-03-03 19:01:10,086 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:10,086 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 28 treesize of output 25 [2022-03-03 19:01:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:10,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379979388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:10,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:10,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:10,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521633964] [2022-03-03 19:01:10,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:10,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:10,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:10,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:10,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:10,092 INFO L87 Difference]: Start difference. First operand 1012 states and 3280 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:10,246 INFO L93 Difference]: Finished difference Result 1115 states and 3569 transitions. [2022-03-03 19:01:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:01:10,246 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:01:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:10,248 INFO L225 Difference]: With dead ends: 1115 [2022-03-03 19:01:10,248 INFO L226 Difference]: Without dead ends: 1100 [2022-03-03 19:01:10,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:10,249 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:10,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 254 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 353 Invalid, 0 Unknown, 180 Unchecked, 0.1s Time] [2022-03-03 19:01:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-03-03 19:01:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1002. [2022-03-03 19:01:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.24975024975025) internal successors, (3253), 1001 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3253 transitions. [2022-03-03 19:01:10,261 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3253 transitions. Word has length 24 [2022-03-03 19:01:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:10,261 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 3253 transitions. [2022-03-03 19:01:10,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3253 transitions. [2022-03-03 19:01:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:10,263 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:10,263 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:10,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 19:01:10,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:10,464 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:10,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:10,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1771342737, now seen corresponding path program 66 times [2022-03-03 19:01:10,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:10,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959850638] [2022-03-03 19:01:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:10,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:10,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959850638] [2022-03-03 19:01:10,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959850638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:10,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633892458] [2022-03-03 19:01:10,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:01:10,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:10,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:10,612 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) [2022-03-03 19:01:10,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:01:10,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:01:10,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:10,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:10,770 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 [2022-03-03 19:01:10,824 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 [2022-03-03 19:01:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:10,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:11,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:11,425 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 79 treesize of output 70 [2022-03-03 19:01:11,547 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:11,548 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:01:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:11,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633892458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:11,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:11,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:01:11,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618053015] [2022-03-03 19:01:11,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:11,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:01:11,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:11,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:01:11,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:01:11,553 INFO L87 Difference]: Start difference. First operand 1002 states and 3253 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-03-03 19:01:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:11,938 INFO L93 Difference]: Finished difference Result 1426 states and 4526 transitions. [2022-03-03 19:01:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:01:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) Word has length 24 [2022-03-03 19:01:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:11,940 INFO L225 Difference]: With dead ends: 1426 [2022-03-03 19:01:11,940 INFO L226 Difference]: Without dead ends: 1343 [2022-03-03 19:01:11,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:01:11,940 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 109 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:11,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 210 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 626 Invalid, 0 Unknown, 213 Unchecked, 0.3s Time] [2022-03-03 19:01:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-03-03 19:01:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1017. [2022-03-03 19:01:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.2431102362204722) internal successors, (3295), 1016 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3295 transitions. [2022-03-03 19:01:11,953 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3295 transitions. Word has length 24 [2022-03-03 19:01:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:11,953 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 3295 transitions. [2022-03-03 19:01:11,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-03-03 19:01:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3295 transitions. [2022-03-03 19:01:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:11,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:11,955 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:11,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-03 19:01:12,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:12,157 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:12,157 INFO L85 PathProgramCache]: Analyzing trace with hash -672599755, now seen corresponding path program 67 times [2022-03-03 19:01:12,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:12,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231712591] [2022-03-03 19:01:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:12,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:12,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:12,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231712591] [2022-03-03 19:01:12,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231712591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:12,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196387137] [2022-03-03 19:01:12,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:01:12,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:12,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:12,324 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) [2022-03-03 19:01:12,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:01:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:12,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:01:12,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:12,488 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 [2022-03-03 19:01:12,622 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 [2022-03-03 19:01:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:12,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:13,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:13,284 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-03 19:01:13,472 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:13,472 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-03 19:01:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:13,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196387137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:13,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:13,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:13,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286677994] [2022-03-03 19:01:13,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:13,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:13,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:13,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:13,478 INFO L87 Difference]: Start difference. First operand 1017 states and 3295 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:14,525 INFO L93 Difference]: Finished difference Result 1646 states and 5082 transitions. [2022-03-03 19:01:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:01:14,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:14,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:14,528 INFO L225 Difference]: With dead ends: 1646 [2022-03-03 19:01:14,528 INFO L226 Difference]: Without dead ends: 1493 [2022-03-03 19:01:14,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:01:14,528 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:14,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 366 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 962 Invalid, 0 Unknown, 114 Unchecked, 0.4s Time] [2022-03-03 19:01:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-03-03 19:01:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1052. [2022-03-03 19:01:14,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 3.2350142721217887) internal successors, (3400), 1051 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3400 transitions. [2022-03-03 19:01:14,543 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3400 transitions. Word has length 24 [2022-03-03 19:01:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:14,543 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 3400 transitions. [2022-03-03 19:01:14,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3400 transitions. [2022-03-03 19:01:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:14,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:14,544 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:14,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:14,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:14,745 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:14,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1996732445, now seen corresponding path program 68 times [2022-03-03 19:01:14,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:14,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439386976] [2022-03-03 19:01:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:14,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:14,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:14,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439386976] [2022-03-03 19:01:14,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439386976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:14,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572909403] [2022-03-03 19:01:14,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:01:14,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:14,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:14,870 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) [2022-03-03 19:01:14,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:01:14,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:01:14,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:14,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:14,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:15,009 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 19 treesize of output 15 [2022-03-03 19:01:15,045 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 [2022-03-03 19:01:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:15,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:15,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:15,490 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-03 19:01:15,683 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:15,683 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 20 treesize of output 19 [2022-03-03 19:01:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:15,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572909403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:15,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:15,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:01:15,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140027366] [2022-03-03 19:01:15,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:15,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:01:15,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:15,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:01:15,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:01:15,687 INFO L87 Difference]: Start difference. First operand 1052 states and 3400 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-03-03 19:01:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:16,093 INFO L93 Difference]: Finished difference Result 1358 states and 4283 transitions. [2022-03-03 19:01:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:01:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 24 [2022-03-03 19:01:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:16,095 INFO L225 Difference]: With dead ends: 1358 [2022-03-03 19:01:16,095 INFO L226 Difference]: Without dead ends: 1308 [2022-03-03 19:01:16,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:16,096 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:16,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 259 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:01:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-03-03 19:01:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1052. [2022-03-03 19:01:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 3.2350142721217887) internal successors, (3400), 1051 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3400 transitions. [2022-03-03 19:01:16,109 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3400 transitions. Word has length 24 [2022-03-03 19:01:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:16,109 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 3400 transitions. [2022-03-03 19:01:16,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-03-03 19:01:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3400 transitions. [2022-03-03 19:01:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:16,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:16,111 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:16,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:16,311 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,SelfDestructingSolverStorable83 [2022-03-03 19:01:16,312 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1946331129, now seen corresponding path program 69 times [2022-03-03 19:01:16,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:16,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823626160] [2022-03-03 19:01:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:16,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:16,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823626160] [2022-03-03 19:01:16,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823626160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:16,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673826595] [2022-03-03 19:01:16,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:01:16,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:16,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:16,473 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) [2022-03-03 19:01:16,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:01:16,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:01:16,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:16,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:16,593 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 [2022-03-03 19:01:16,616 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 [2022-03-03 19:01:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:16,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:17,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:17,073 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 46 treesize of output 44 [2022-03-03 19:01:17,199 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:17,200 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 28 treesize of output 25 [2022-03-03 19:01:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:17,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673826595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:17,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:17,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-03 19:01:17,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835981511] [2022-03-03 19:01:17,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:17,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:01:17,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:01:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:01:17,204 INFO L87 Difference]: Start difference. First operand 1052 states and 3400 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2022-03-03 19:01:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:17,687 INFO L93 Difference]: Finished difference Result 1603 states and 5103 transitions. [2022-03-03 19:01:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:01:17,687 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 24 [2022-03-03 19:01:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:17,701 INFO L225 Difference]: With dead ends: 1603 [2022-03-03 19:01:17,702 INFO L226 Difference]: Without dead ends: 1572 [2022-03-03 19:01:17,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:01:17,702 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:17,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 272 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:01:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2022-03-03 19:01:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1065. [2022-03-03 19:01:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.244360902255639) internal successors, (3452), 1064 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3452 transitions. [2022-03-03 19:01:17,716 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3452 transitions. Word has length 24 [2022-03-03 19:01:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:17,716 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 3452 transitions. [2022-03-03 19:01:17,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2022-03-03 19:01:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3452 transitions. [2022-03-03 19:01:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:17,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:17,718 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:17,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-03 19:01:17,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:17,918 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1747003993, now seen corresponding path program 70 times [2022-03-03 19:01:17,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:17,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486630997] [2022-03-03 19:01:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:17,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:18,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:18,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486630997] [2022-03-03 19:01:18,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486630997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:18,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676052146] [2022-03-03 19:01:18,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:01:18,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:18,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:18,143 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) [2022-03-03 19:01:18,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:01:18,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:01:18,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:18,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:01:18,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:18,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:18,281 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 41 treesize of output 35 [2022-03-03 19:01:18,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:18,407 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-03 19:01:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:18,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:19,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:19,258 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-03-03 19:01:19,375 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:19,376 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 32 treesize of output 29 [2022-03-03 19:01:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:19,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676052146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:19,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:19,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:01:19,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143814852] [2022-03-03 19:01:19,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:19,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:01:19,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:19,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:01:19,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:01:19,381 INFO L87 Difference]: Start difference. First operand 1065 states and 3452 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:19,665 INFO L93 Difference]: Finished difference Result 1173 states and 3765 transitions. [2022-03-03 19:01:19,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:01:19,665 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:19,667 INFO L225 Difference]: With dead ends: 1173 [2022-03-03 19:01:19,667 INFO L226 Difference]: Without dead ends: 1128 [2022-03-03 19:01:19,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:01:19,667 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:19,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 211 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 477 Invalid, 0 Unknown, 284 Unchecked, 0.2s Time] [2022-03-03 19:01:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-03-03 19:01:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1068. [2022-03-03 19:01:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.246485473289597) internal successors, (3464), 1067 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3464 transitions. [2022-03-03 19:01:19,680 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3464 transitions. Word has length 24 [2022-03-03 19:01:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:19,680 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 3464 transitions. [2022-03-03 19:01:19,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3464 transitions. [2022-03-03 19:01:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:19,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:19,682 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:19,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:19,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:19,882 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:19,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1383521039, now seen corresponding path program 71 times [2022-03-03 19:01:19,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:19,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819394537] [2022-03-03 19:01:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:20,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:20,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819394537] [2022-03-03 19:01:20,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819394537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:20,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958551838] [2022-03-03 19:01:20,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:01:20,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:20,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:20,079 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) [2022-03-03 19:01:20,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:01:20,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:01:20,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:20,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:20,242 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 41 treesize of output 35 [2022-03-03 19:01:20,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:20,351 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 43 treesize of output 37 [2022-03-03 19:01:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:20,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:21,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:21,106 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 120 treesize of output 104 [2022-03-03 19:01:21,252 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:21,252 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 28 treesize of output 25 [2022-03-03 19:01:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:21,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958551838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:21,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:21,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:21,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24356482] [2022-03-03 19:01:21,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:21,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:21,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:21,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:21,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:21,262 INFO L87 Difference]: Start difference. First operand 1068 states and 3464 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:21,834 INFO L93 Difference]: Finished difference Result 1267 states and 4012 transitions. [2022-03-03 19:01:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:01:21,835 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:01:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:21,837 INFO L225 Difference]: With dead ends: 1267 [2022-03-03 19:01:21,837 INFO L226 Difference]: Without dead ends: 1174 [2022-03-03 19:01:21,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:01:21,837 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:21,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 250 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 491 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-03-03 19:01:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-03-03 19:01:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1073. [2022-03-03 19:01:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.246268656716418) internal successors, (3480), 1072 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3480 transitions. [2022-03-03 19:01:21,850 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3480 transitions. Word has length 24 [2022-03-03 19:01:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:21,850 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3480 transitions. [2022-03-03 19:01:21,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3480 transitions. [2022-03-03 19:01:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:21,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:21,851 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:21,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:22,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:22,052 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1862524707, now seen corresponding path program 72 times [2022-03-03 19:01:22,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:22,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818922982] [2022-03-03 19:01:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:22,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:22,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818922982] [2022-03-03 19:01:22,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818922982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:22,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850001744] [2022-03-03 19:01:22,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:01:22,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:22,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:22,288 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) [2022-03-03 19:01:22,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:01:22,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:01:22,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:22,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:22,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:22,428 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 41 treesize of output 35 [2022-03-03 19:01:22,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:22,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:01:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:22,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:23,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:23,424 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 120 treesize of output 104 [2022-03-03 19:01:23,510 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:23,510 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 28 treesize of output 25 [2022-03-03 19:01:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:23,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850001744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:23,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:23,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:01:23,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828990289] [2022-03-03 19:01:23,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:23,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:01:23,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:01:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:01:23,516 INFO L87 Difference]: Start difference. First operand 1073 states and 3480 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:23,669 INFO L93 Difference]: Finished difference Result 1184 states and 3820 transitions. [2022-03-03 19:01:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:01:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:23,671 INFO L225 Difference]: With dead ends: 1184 [2022-03-03 19:01:23,671 INFO L226 Difference]: Without dead ends: 1153 [2022-03-03 19:01:23,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:23,672 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:23,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 164 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 310 Invalid, 0 Unknown, 269 Unchecked, 0.1s Time] [2022-03-03 19:01:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-03-03 19:01:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1084. [2022-03-03 19:01:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 3.2539242843951985) internal successors, (3524), 1083 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 3524 transitions. [2022-03-03 19:01:23,684 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 3524 transitions. Word has length 24 [2022-03-03 19:01:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:23,684 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 3524 transitions. [2022-03-03 19:01:23,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 3524 transitions. [2022-03-03 19:01:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:23,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:23,686 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:23,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:23,889 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,SelfDestructingSolverStorable87 [2022-03-03 19:01:23,889 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash 883878415, now seen corresponding path program 73 times [2022-03-03 19:01:23,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:23,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146578843] [2022-03-03 19:01:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:23,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:24,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:24,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146578843] [2022-03-03 19:01:24,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146578843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:24,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521770800] [2022-03-03 19:01:24,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:01:24,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:24,092 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) [2022-03-03 19:01:24,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:01:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:01:24,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:24,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:24,228 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 41 treesize of output 35 [2022-03-03 19:01:24,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:24,497 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:01:24,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-03 19:01:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:24,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:25,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:25,164 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 78 treesize of output 70 [2022-03-03 19:01:25,283 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:25,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 29 [2022-03-03 19:01:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:25,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521770800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:25,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:25,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:01:25,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664709778] [2022-03-03 19:01:25,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:25,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:01:25,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:25,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:01:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:01:25,288 INFO L87 Difference]: Start difference. First operand 1084 states and 3524 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:25,539 INFO L93 Difference]: Finished difference Result 1237 states and 3985 transitions. [2022-03-03 19:01:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:01:25,540 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:25,542 INFO L225 Difference]: With dead ends: 1237 [2022-03-03 19:01:25,542 INFO L226 Difference]: Without dead ends: 1191 [2022-03-03 19:01:25,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:01:25,542 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:25,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 256 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 523 Invalid, 0 Unknown, 220 Unchecked, 0.2s Time] [2022-03-03 19:01:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-03-03 19:01:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1115. [2022-03-03 19:01:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 3.244165170556553) internal successors, (3614), 1114 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3614 transitions. [2022-03-03 19:01:25,555 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3614 transitions. Word has length 24 [2022-03-03 19:01:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:25,555 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 3614 transitions. [2022-03-03 19:01:25,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3614 transitions. [2022-03-03 19:01:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:25,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:25,557 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:25,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:25,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:25,759 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:25,759 INFO L85 PathProgramCache]: Analyzing trace with hash 208496487, now seen corresponding path program 74 times [2022-03-03 19:01:25,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:25,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126863592] [2022-03-03 19:01:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:25,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:26,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:26,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126863592] [2022-03-03 19:01:26,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126863592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:26,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464738771] [2022-03-03 19:01:26,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:01:26,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:26,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:26,009 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) [2022-03-03 19:01:26,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:01:26,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:01:26,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:26,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:26,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:26,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:26,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:01:26,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:26,447 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 29 treesize of output 23 [2022-03-03 19:01:26,448 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 [2022-03-03 19:01:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:26,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:27,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:27,190 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 120 treesize of output 104 [2022-03-03 19:01:27,311 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:27,311 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 28 treesize of output 25 [2022-03-03 19:01:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:27,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464738771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:27,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:27,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:01:27,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869704287] [2022-03-03 19:01:27,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:01:27,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:01:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:01:27,317 INFO L87 Difference]: Start difference. First operand 1115 states and 3614 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:27,530 INFO L93 Difference]: Finished difference Result 1196 states and 3879 transitions. [2022-03-03 19:01:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:01:27,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:27,532 INFO L225 Difference]: With dead ends: 1196 [2022-03-03 19:01:27,532 INFO L226 Difference]: Without dead ends: 1193 [2022-03-03 19:01:27,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:27,533 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:27,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 264 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 445 Invalid, 0 Unknown, 224 Unchecked, 0.2s Time] [2022-03-03 19:01:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-03-03 19:01:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1112. [2022-03-03 19:01:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.2484248424842486) internal successors, (3609), 1111 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:27,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3609 transitions. [2022-03-03 19:01:27,545 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3609 transitions. Word has length 24 [2022-03-03 19:01:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:27,545 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3609 transitions. [2022-03-03 19:01:27,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:27,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3609 transitions. [2022-03-03 19:01:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:27,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:27,547 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:27,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 19:01:27,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:27,748 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:27,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1416482441, now seen corresponding path program 75 times [2022-03-03 19:01:27,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:27,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582902976] [2022-03-03 19:01:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:27,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:27,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:27,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582902976] [2022-03-03 19:01:27,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582902976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:27,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522150487] [2022-03-03 19:01:27,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:01:27,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:27,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:27,947 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) [2022-03-03 19:01:27,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:01:27,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:01:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:27,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:28,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:28,080 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 [2022-03-03 19:01:28,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:28,263 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-03 19:01:28,265 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 11 treesize of output 7 [2022-03-03 19:01:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:28,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:28,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:28,867 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 50 treesize of output 47 [2022-03-03 19:01:28,932 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:28,940 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 28 treesize of output 25 [2022-03-03 19:01:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:28,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522150487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:28,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:28,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:28,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088361478] [2022-03-03 19:01:28,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:28,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:28,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:28,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:28,945 INFO L87 Difference]: Start difference. First operand 1112 states and 3609 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:29,179 INFO L93 Difference]: Finished difference Result 1191 states and 3825 transitions. [2022-03-03 19:01:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:01:29,179 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:01:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:29,181 INFO L225 Difference]: With dead ends: 1191 [2022-03-03 19:01:29,181 INFO L226 Difference]: Without dead ends: 1184 [2022-03-03 19:01:29,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:01:29,182 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:29,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 269 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-03-03 19:01:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-03-03 19:01:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1120. [2022-03-03 19:01:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.2377122430741734) internal successors, (3623), 1119 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3623 transitions. [2022-03-03 19:01:29,194 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3623 transitions. Word has length 24 [2022-03-03 19:01:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:29,195 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3623 transitions. [2022-03-03 19:01:29,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3623 transitions. [2022-03-03 19:01:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:29,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:29,196 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:29,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 19:01:29,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:29,397 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:29,397 INFO L85 PathProgramCache]: Analyzing trace with hash -127882999, now seen corresponding path program 76 times [2022-03-03 19:01:29,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:29,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751410417] [2022-03-03 19:01:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:29,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:29,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:29,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751410417] [2022-03-03 19:01:29,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751410417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:29,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166599793] [2022-03-03 19:01:29,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:01:29,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:29,591 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) [2022-03-03 19:01:29,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:01:29,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:01:29,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:01:29,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:29,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:29,763 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 41 treesize of output 35 [2022-03-03 19:01:30,030 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 [2022-03-03 19:01:30,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:30,033 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-03 19:01:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:30,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:30,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:30,746 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-03 19:01:30,861 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:30,862 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 32 treesize of output 29 [2022-03-03 19:01:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:30,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166599793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:30,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:30,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:01:30,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715836122] [2022-03-03 19:01:30,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:30,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:01:30,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:30,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:01:30,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:01:30,868 INFO L87 Difference]: Start difference. First operand 1120 states and 3623 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:31,149 INFO L93 Difference]: Finished difference Result 1317 states and 4143 transitions. [2022-03-03 19:01:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:01:31,150 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:31,152 INFO L225 Difference]: With dead ends: 1317 [2022-03-03 19:01:31,152 INFO L226 Difference]: Without dead ends: 1238 [2022-03-03 19:01:31,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:01:31,155 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:31,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 307 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 517 Invalid, 0 Unknown, 320 Unchecked, 0.2s Time] [2022-03-03 19:01:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-03-03 19:01:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1138. [2022-03-03 19:01:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.2348284960422165) internal successors, (3678), 1137 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3678 transitions. [2022-03-03 19:01:31,174 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3678 transitions. Word has length 24 [2022-03-03 19:01:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:31,175 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 3678 transitions. [2022-03-03 19:01:31,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3678 transitions. [2022-03-03 19:01:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:31,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:31,176 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:31,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-03 19:01:31,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:31,377 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:31,377 INFO L85 PathProgramCache]: Analyzing trace with hash 741100513, now seen corresponding path program 77 times [2022-03-03 19:01:31,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:31,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879829224] [2022-03-03 19:01:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:31,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:31,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:31,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879829224] [2022-03-03 19:01:31,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879829224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:31,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133403370] [2022-03-03 19:01:31,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:01:31,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:31,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:31,566 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) [2022-03-03 19:01:31,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:01:31,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:01:31,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:31,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:31,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:31,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:31,707 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 [2022-03-03 19:01:31,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:31,916 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 17 [2022-03-03 19:01:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:31,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:32,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:32,532 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 51 treesize of output 48 [2022-03-03 19:01:32,598 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:32,599 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:01:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:32,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133403370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:32,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:32,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:32,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770679803] [2022-03-03 19:01:32,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:32,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:32,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:32,604 INFO L87 Difference]: Start difference. First operand 1138 states and 3678 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:32,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:32,922 INFO L93 Difference]: Finished difference Result 1290 states and 4104 transitions. [2022-03-03 19:01:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:01:32,922 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:01:32,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:32,924 INFO L225 Difference]: With dead ends: 1290 [2022-03-03 19:01:32,924 INFO L226 Difference]: Without dead ends: 1263 [2022-03-03 19:01:32,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:01:32,924 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:32,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 293 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 433 Invalid, 0 Unknown, 464 Unchecked, 0.2s Time] [2022-03-03 19:01:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-03-03 19:01:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1136. [2022-03-03 19:01:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2334801762114536) internal successors, (3670), 1135 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3670 transitions. [2022-03-03 19:01:32,937 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3670 transitions. Word has length 24 [2022-03-03 19:01:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:32,937 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 3670 transitions. [2022-03-03 19:01:32,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3670 transitions. [2022-03-03 19:01:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:32,939 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:32,939 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:32,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:33,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:33,139 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:33,140 INFO L85 PathProgramCache]: Analyzing trace with hash 399475645, now seen corresponding path program 78 times [2022-03-03 19:01:33,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:33,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906740483] [2022-03-03 19:01:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:33,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:33,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:33,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906740483] [2022-03-03 19:01:33,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906740483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:33,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181410100] [2022-03-03 19:01:33,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:01:33,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:33,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:33,327 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) [2022-03-03 19:01:33,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:01:33,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:01:33,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:33,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:33,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:33,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:33,466 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:01:33,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:33,618 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 43 treesize of output 37 [2022-03-03 19:01:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:33,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:34,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:34,255 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 120 treesize of output 104 [2022-03-03 19:01:34,353 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:34,353 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 28 treesize of output 25 [2022-03-03 19:01:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:34,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181410100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:34,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:34,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:34,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619885266] [2022-03-03 19:01:34,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:34,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:34,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:34,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:34,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:34,359 INFO L87 Difference]: Start difference. First operand 1136 states and 3670 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:34,691 INFO L93 Difference]: Finished difference Result 1261 states and 4062 transitions. [2022-03-03 19:01:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:01:34,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:01:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:34,693 INFO L225 Difference]: With dead ends: 1261 [2022-03-03 19:01:34,693 INFO L226 Difference]: Without dead ends: 1226 [2022-03-03 19:01:34,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:01:34,693 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 516 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:34,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 281 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 585 Invalid, 0 Unknown, 516 Unchecked, 0.2s Time] [2022-03-03 19:01:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-03-03 19:01:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1136. [2022-03-03 19:01:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2334801762114536) internal successors, (3670), 1135 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3670 transitions. [2022-03-03 19:01:34,706 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3670 transitions. Word has length 24 [2022-03-03 19:01:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:34,706 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 3670 transitions. [2022-03-03 19:01:34,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3670 transitions. [2022-03-03 19:01:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:34,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:34,707 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:34,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:34,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:34,908 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:34,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1088485831, now seen corresponding path program 79 times [2022-03-03 19:01:34,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:34,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936464692] [2022-03-03 19:01:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:34,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:35,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:35,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936464692] [2022-03-03 19:01:35,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936464692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:35,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396309548] [2022-03-03 19:01:35,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:01:35,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:35,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:35,116 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) [2022-03-03 19:01:35,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 19:01:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:35,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:35,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:35,265 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 41 treesize of output 35 [2022-03-03 19:01:35,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:35,438 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 24 treesize of output 20 [2022-03-03 19:01:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:35,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:36,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:36,027 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 120 treesize of output 104 [2022-03-03 19:01:36,160 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:36,161 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 [2022-03-03 19:01:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:36,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396309548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:36,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:36,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:36,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828494332] [2022-03-03 19:01:36,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:36,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:36,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:36,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:36,166 INFO L87 Difference]: Start difference. First operand 1136 states and 3670 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:36,504 INFO L93 Difference]: Finished difference Result 1316 states and 4143 transitions. [2022-03-03 19:01:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:01:36,505 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:01:36,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:36,507 INFO L225 Difference]: With dead ends: 1316 [2022-03-03 19:01:36,507 INFO L226 Difference]: Without dead ends: 1243 [2022-03-03 19:01:36,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:01:36,507 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:36,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 254 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 510 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-03-03 19:01:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-03-03 19:01:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1136. [2022-03-03 19:01:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2334801762114536) internal successors, (3670), 1135 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3670 transitions. [2022-03-03 19:01:36,521 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3670 transitions. Word has length 24 [2022-03-03 19:01:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:36,521 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 3670 transitions. [2022-03-03 19:01:36,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3670 transitions. [2022-03-03 19:01:36,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:36,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:36,523 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:36,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-03 19:01:36,723 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,SelfDestructingSolverStorable94 [2022-03-03 19:01:36,723 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:36,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:36,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2024529937, now seen corresponding path program 80 times [2022-03-03 19:01:36,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:36,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489888196] [2022-03-03 19:01:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:36,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:36,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:36,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489888196] [2022-03-03 19:01:36,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489888196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:36,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425426943] [2022-03-03 19:01:36,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:01:36,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:36,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:36,949 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) [2022-03-03 19:01:36,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 19:01:36,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:01:36,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:36,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:36,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:37,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:37,089 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 41 treesize of output 35 [2022-03-03 19:01:37,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:37,214 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 24 treesize of output 20 [2022-03-03 19:01:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:37,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:38,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:38,031 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 120 treesize of output 104 [2022-03-03 19:01:38,131 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:38,131 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 28 treesize of output 25 [2022-03-03 19:01:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:38,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425426943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:38,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:38,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:38,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484526694] [2022-03-03 19:01:38,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:38,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:38,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:38,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:38,137 INFO L87 Difference]: Start difference. First operand 1136 states and 3670 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:38,401 INFO L93 Difference]: Finished difference Result 1338 states and 4310 transitions. [2022-03-03 19:01:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:01:38,401 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 24 [2022-03-03 19:01:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:38,403 INFO L225 Difference]: With dead ends: 1338 [2022-03-03 19:01:38,403 INFO L226 Difference]: Without dead ends: 1280 [2022-03-03 19:01:38,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:01:38,403 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:38,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 221 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 336 Invalid, 0 Unknown, 324 Unchecked, 0.1s Time] [2022-03-03 19:01:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-03-03 19:01:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1144. [2022-03-03 19:01:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.2405949256342956) internal successors, (3704), 1143 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3704 transitions. [2022-03-03 19:01:38,417 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3704 transitions. Word has length 24 [2022-03-03 19:01:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:38,418 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 3704 transitions. [2022-03-03 19:01:38,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-03-03 19:01:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3704 transitions. [2022-03-03 19:01:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:38,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:38,419 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:38,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-03 19:01:38,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:38,620 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1335519751, now seen corresponding path program 81 times [2022-03-03 19:01:38,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:38,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208827678] [2022-03-03 19:01:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:01:38,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:38,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208827678] [2022-03-03 19:01:38,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208827678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:38,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773926544] [2022-03-03 19:01:38,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:01:38,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:38,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:38,848 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) [2022-03-03 19:01:38,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 19:01:38,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:01:38,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:38,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:01:38,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:39,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:39,002 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 41 treesize of output 35 [2022-03-03 19:01:39,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:39,150 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 24 treesize of output 20 [2022-03-03 19:01:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:01:39,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:39,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:39,883 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-03-03 19:01:39,987 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:39,988 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 32 treesize of output 29 [2022-03-03 19:01:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:01:39,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773926544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:39,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:39,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:01:39,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963095351] [2022-03-03 19:01:39,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:39,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:01:39,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:39,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:01:39,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:01:39,993 INFO L87 Difference]: Start difference. First operand 1144 states and 3704 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:40,872 INFO L93 Difference]: Finished difference Result 1656 states and 5175 transitions. [2022-03-03 19:01:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:01:40,872 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:40,875 INFO L225 Difference]: With dead ends: 1656 [2022-03-03 19:01:40,875 INFO L226 Difference]: Without dead ends: 1482 [2022-03-03 19:01:40,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:01:40,876 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:40,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 284 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 531 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-03-03 19:01:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-03-03 19:01:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1179. [2022-03-03 19:01:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 3.2716468590831917) internal successors, (3854), 1178 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3854 transitions. [2022-03-03 19:01:40,891 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3854 transitions. Word has length 24 [2022-03-03 19:01:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:40,891 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 3854 transitions. [2022-03-03 19:01:40,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3854 transitions. [2022-03-03 19:01:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:40,893 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:40,893 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:40,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:41,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:41,094 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash 721873185, now seen corresponding path program 82 times [2022-03-03 19:01:41,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:41,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436690678] [2022-03-03 19:01:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:41,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:41,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:41,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436690678] [2022-03-03 19:01:41,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436690678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:41,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003884706] [2022-03-03 19:01:41,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:01:41,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:41,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:41,277 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) [2022-03-03 19:01:41,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 19:01:41,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:01:41,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:41,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:01:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:41,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:41,434 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:01:41,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:41,691 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 [2022-03-03 19:01:41,693 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 [2022-03-03 19:01:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:41,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:42,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:42,313 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 78 treesize of output 70 [2022-03-03 19:01:42,436 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:42,436 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 32 treesize of output 29 [2022-03-03 19:01:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:42,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003884706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:42,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:42,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:01:42,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115127675] [2022-03-03 19:01:42,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:42,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:01:42,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:42,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:01:42,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:01:42,441 INFO L87 Difference]: Start difference. First operand 1179 states and 3854 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:42,750 INFO L93 Difference]: Finished difference Result 1491 states and 4855 transitions. [2022-03-03 19:01:42,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:01:42,750 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:42,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:42,752 INFO L225 Difference]: With dead ends: 1491 [2022-03-03 19:01:42,752 INFO L226 Difference]: Without dead ends: 1403 [2022-03-03 19:01:42,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:01:42,753 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 125 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:42,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 290 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 574 Invalid, 0 Unknown, 490 Unchecked, 0.2s Time] [2022-03-03 19:01:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-03-03 19:01:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1193. [2022-03-03 19:01:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 3.2676174496644297) internal successors, (3895), 1192 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3895 transitions. [2022-03-03 19:01:42,766 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3895 transitions. Word has length 24 [2022-03-03 19:01:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:42,767 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 3895 transitions. [2022-03-03 19:01:42,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3895 transitions. [2022-03-03 19:01:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:42,768 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:42,768 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:42,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-03 19:01:42,968 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,SelfDestructingSolverStorable97 [2022-03-03 19:01:42,969 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1792328729, now seen corresponding path program 83 times [2022-03-03 19:01:42,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:42,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620544464] [2022-03-03 19:01:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:01:43,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:43,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620544464] [2022-03-03 19:01:43,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620544464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:43,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571929638] [2022-03-03 19:01:43,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:01:43,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:43,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:43,176 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) [2022-03-03 19:01:43,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 19:01:43,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:01:43,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:43,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:43,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:43,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:43,320 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:01:43,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:43,428 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 24 treesize of output 20 [2022-03-03 19:01:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:01:43,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:44,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:44,149 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 43 treesize of output 41 [2022-03-03 19:01:44,229 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:44,229 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 28 treesize of output 25 [2022-03-03 19:01:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:01:44,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571929638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:44,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:44,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:44,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192433866] [2022-03-03 19:01:44,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:44,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:44,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:44,234 INFO L87 Difference]: Start difference. First operand 1193 states and 3895 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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) [2022-03-03 19:01:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:46,137 INFO L93 Difference]: Finished difference Result 2037 states and 6285 transitions. [2022-03-03 19:01:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:01:46,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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) Word has length 24 [2022-03-03 19:01:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:46,141 INFO L225 Difference]: With dead ends: 2037 [2022-03-03 19:01:46,141 INFO L226 Difference]: Without dead ends: 1947 [2022-03-03 19:01:46,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:01:46,141 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 163 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:46,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 598 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 648 Invalid, 0 Unknown, 413 Unchecked, 0.3s Time] [2022-03-03 19:01:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-03-03 19:01:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1276. [2022-03-03 19:01:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.2980392156862743) internal successors, (4205), 1275 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4205 transitions. [2022-03-03 19:01:46,162 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4205 transitions. Word has length 24 [2022-03-03 19:01:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:46,163 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 4205 transitions. [2022-03-03 19:01:46,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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) [2022-03-03 19:01:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4205 transitions. [2022-03-03 19:01:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:46,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:46,164 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:46,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:46,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:46,375 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1816493125, now seen corresponding path program 84 times [2022-03-03 19:01:46,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:46,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167403857] [2022-03-03 19:01:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:46,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:01:46,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:46,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167403857] [2022-03-03 19:01:46,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167403857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:46,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555924270] [2022-03-03 19:01:46,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:01:46,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:46,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:46,572 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) [2022-03-03 19:01:46,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 19:01:46,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:01:46,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:46,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:46,675 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 35 [2022-03-03 19:01:46,798 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 24 treesize of output 20 [2022-03-03 19:01:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:01:46,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:47,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:47,558 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-03 19:01:47,697 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:47,697 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 [2022-03-03 19:01:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:01:47,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555924270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:47,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:47,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:01:47,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617477887] [2022-03-03 19:01:47,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:47,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:01:47,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:47,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:01:47,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:01:47,701 INFO L87 Difference]: Start difference. First operand 1276 states and 4205 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:48,745 INFO L93 Difference]: Finished difference Result 2406 states and 7640 transitions. [2022-03-03 19:01:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:01:48,746 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:48,750 INFO L225 Difference]: With dead ends: 2406 [2022-03-03 19:01:48,750 INFO L226 Difference]: Without dead ends: 2308 [2022-03-03 19:01:48,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:01:48,750 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 253 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:48,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 307 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:01:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-03-03 19:01:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1201. [2022-03-03 19:01:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.2741666666666664) internal successors, (3929), 1200 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3929 transitions. [2022-03-03 19:01:48,770 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3929 transitions. Word has length 24 [2022-03-03 19:01:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:48,771 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 3929 transitions. [2022-03-03 19:01:48,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3929 transitions. [2022-03-03 19:01:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:48,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:48,772 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:48,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:48,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:48,976 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash -897088681, now seen corresponding path program 85 times [2022-03-03 19:01:48,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:48,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944015245] [2022-03-03 19:01:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:49,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:49,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944015245] [2022-03-03 19:01:49,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944015245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:49,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816574906] [2022-03-03 19:01:49,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:01:49,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:49,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:49,154 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) [2022-03-03 19:01:49,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 19:01:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:01:49,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:49,251 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 35 [2022-03-03 19:01:49,345 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 43 treesize of output 37 [2022-03-03 19:01:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:49,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:49,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:49,952 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 78 treesize of output 70 [2022-03-03 19:01:50,061 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:50,061 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 32 treesize of output 29 [2022-03-03 19:01:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:50,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816574906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:50,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:50,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:01:50,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066623307] [2022-03-03 19:01:50,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:50,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:01:50,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:01:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:01:50,066 INFO L87 Difference]: Start difference. First operand 1201 states and 3929 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:54,109 INFO L93 Difference]: Finished difference Result 2429 states and 7274 transitions. [2022-03-03 19:01:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:01:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:54,120 INFO L225 Difference]: With dead ends: 2429 [2022-03-03 19:01:54,120 INFO L226 Difference]: Without dead ends: 2167 [2022-03-03 19:01:54,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=995, Invalid=4117, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:01:54,120 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 398 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:54,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 492 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:01:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2022-03-03 19:01:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1271. [2022-03-03 19:01:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1270 states have (on average 3.2669291338582678) internal successors, (4149), 1270 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 4149 transitions. [2022-03-03 19:01:54,140 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 4149 transitions. Word has length 24 [2022-03-03 19:01:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:54,140 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 4149 transitions. [2022-03-03 19:01:54,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 4149 transitions. [2022-03-03 19:01:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:54,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:54,142 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:54,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-03 19:01:54,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-03 19:01:54,342 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:54,343 INFO L85 PathProgramCache]: Analyzing trace with hash -356097833, now seen corresponding path program 86 times [2022-03-03 19:01:54,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:54,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626681600] [2022-03-03 19:01:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:54,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:01:54,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:54,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626681600] [2022-03-03 19:01:54,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626681600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:54,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922638684] [2022-03-03 19:01:54,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:01:54,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:54,504 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) [2022-03-03 19:01:54,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 19:01:54,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:01:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:54,599 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 35 [2022-03-03 19:01:54,725 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 [2022-03-03 19:01:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:01:54,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:55,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:55,331 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-03 19:01:55,432 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:55,432 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 25 [2022-03-03 19:01:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:01:55,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922638684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:55,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:55,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:01:55,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793075418] [2022-03-03 19:01:55,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:55,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:01:55,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:01:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:01:55,436 INFO L87 Difference]: Start difference. First operand 1271 states and 4149 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:56,892 INFO L93 Difference]: Finished difference Result 1786 states and 5650 transitions. [2022-03-03 19:01:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:01:56,893 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:56,895 INFO L225 Difference]: With dead ends: 1786 [2022-03-03 19:01:56,895 INFO L226 Difference]: Without dead ends: 1748 [2022-03-03 19:01:56,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:01:56,896 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 178 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:56,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 393 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:01:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2022-03-03 19:01:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1249. [2022-03-03 19:01:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.2836538461538463) internal successors, (4098), 1248 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4098 transitions. [2022-03-03 19:01:56,912 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4098 transitions. Word has length 24 [2022-03-03 19:01:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:56,912 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 4098 transitions. [2022-03-03 19:01:56,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4098 transitions. [2022-03-03 19:01:56,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:56,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:56,914 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:56,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:57,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-03 19:01:57,114 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:57,115 INFO L85 PathProgramCache]: Analyzing trace with hash -644517783, now seen corresponding path program 87 times [2022-03-03 19:01:57,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:57,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685106349] [2022-03-03 19:01:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:57,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:57,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685106349] [2022-03-03 19:01:57,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685106349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:57,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005657999] [2022-03-03 19:01:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:01:57,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:57,283 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) [2022-03-03 19:01:57,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 19:01:57,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:01:57,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:57,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:57,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:57,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:01:57,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:57,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-03 19:01:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:57,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:01:58,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:01:58,189 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:01:58,379 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:01:58,380 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 28 treesize of output 25 [2022-03-03 19:01:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:58,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005657999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:01:58,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:01:58,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:01:58,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023635655] [2022-03-03 19:01:58,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:01:58,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:01:58,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:01:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:01:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:01:58,385 INFO L87 Difference]: Start difference. First operand 1249 states and 4098 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:01:58,620 INFO L93 Difference]: Finished difference Result 1392 states and 4500 transitions. [2022-03-03 19:01:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:01:58,621 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:01:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:01:58,623 INFO L225 Difference]: With dead ends: 1392 [2022-03-03 19:01:58,623 INFO L226 Difference]: Without dead ends: 1357 [2022-03-03 19:01:58,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:01:58,623 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:01:58,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 192 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 487 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-03-03 19:01:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-03-03 19:01:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1249. [2022-03-03 19:01:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.2836538461538463) internal successors, (4098), 1248 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4098 transitions. [2022-03-03 19:01:58,645 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4098 transitions. Word has length 24 [2022-03-03 19:01:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:01:58,645 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 4098 transitions. [2022-03-03 19:01:58,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:01:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4098 transitions. [2022-03-03 19:01:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:01:58,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:01:58,647 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:01:58,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-03 19:01:58,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:58,855 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:01:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:01:58,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1719131341, now seen corresponding path program 88 times [2022-03-03 19:01:58,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:01:58,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758430779] [2022-03-03 19:01:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:01:58,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:01:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:01:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:59,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:01:59,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758430779] [2022-03-03 19:01:59,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758430779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:01:59,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774159611] [2022-03-03 19:01:59,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:01:59,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:01:59,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:01:59,036 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) [2022-03-03 19:01:59,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 19:01:59,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:01:59,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:01:59,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:01:59,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:01:59,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:59,225 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 41 treesize of output 35 [2022-03-03 19:01:59,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:01:59,417 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 26 treesize of output 22 [2022-03-03 19:01:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:01:59,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:00,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:00,165 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 141 treesize of output 121 [2022-03-03 19:02:00,329 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:00,329 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 25 [2022-03-03 19:02:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:00,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774159611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:00,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:00,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:02:00,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357437827] [2022-03-03 19:02:00,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:00,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:02:00,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:02:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:00,335 INFO L87 Difference]: Start difference. First operand 1249 states and 4098 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:00,536 INFO L93 Difference]: Finished difference Result 1390 states and 4528 transitions. [2022-03-03 19:02:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:02:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:00,539 INFO L225 Difference]: With dead ends: 1390 [2022-03-03 19:02:00,539 INFO L226 Difference]: Without dead ends: 1359 [2022-03-03 19:02:00,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:02:00,539 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:00,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 154 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 377 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2022-03-03 19:02:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2022-03-03 19:02:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1248. [2022-03-03 19:02:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.2830793905372895) internal successors, (4094), 1247 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4094 transitions. [2022-03-03 19:02:00,563 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4094 transitions. Word has length 24 [2022-03-03 19:02:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:00,563 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 4094 transitions. [2022-03-03 19:02:00,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4094 transitions. [2022-03-03 19:02:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:00,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:00,565 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:00,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:00,765 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,SelfDestructingSolverStorable103 [2022-03-03 19:02:00,766 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:00,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1525286963, now seen corresponding path program 89 times [2022-03-03 19:02:00,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:00,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984710965] [2022-03-03 19:02:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:00,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:00,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:00,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984710965] [2022-03-03 19:02:00,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984710965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:00,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851856804] [2022-03-03 19:02:00,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:02:00,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:00,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:00,942 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) [2022-03-03 19:02:00,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 19:02:00,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:02:00,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:01,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:01,113 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 41 treesize of output 35 [2022-03-03 19:02:01,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:01,166 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-03 19:02:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:01,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:01,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:01,867 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 81 treesize of output 72 [2022-03-03 19:02:01,998 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:01,998 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 25 [2022-03-03 19:02:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:02,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851856804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:02,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:02,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:02,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161442888] [2022-03-03 19:02:02,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:02,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:02,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:02,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:02,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:02,004 INFO L87 Difference]: Start difference. First operand 1248 states and 4094 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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) [2022-03-03 19:02:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:02,953 INFO L93 Difference]: Finished difference Result 1644 states and 5103 transitions. [2022-03-03 19:02:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:02:02,954 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 24 [2022-03-03 19:02:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:02,956 INFO L225 Difference]: With dead ends: 1644 [2022-03-03 19:02:02,956 INFO L226 Difference]: Without dead ends: 1503 [2022-03-03 19:02:02,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:02:02,957 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 153 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:02,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 299 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 665 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-03-03 19:02:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2022-03-03 19:02:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1264. [2022-03-03 19:02:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.278701504354711) internal successors, (4141), 1263 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4141 transitions. [2022-03-03 19:02:02,973 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4141 transitions. Word has length 24 [2022-03-03 19:02:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:02,973 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 4141 transitions. [2022-03-03 19:02:02,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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) [2022-03-03 19:02:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4141 transitions. [2022-03-03 19:02:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:02,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:02,975 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:02,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:03,175 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,SelfDestructingSolverStorable104 [2022-03-03 19:02:03,175 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:03,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2063384933, now seen corresponding path program 90 times [2022-03-03 19:02:03,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:03,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142105141] [2022-03-03 19:02:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:03,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:03,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142105141] [2022-03-03 19:02:03,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142105141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:03,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086042541] [2022-03-03 19:02:03,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:02:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:03,413 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) [2022-03-03 19:02:03,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 19:02:03,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:02:03,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:03,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:03,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:03,601 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 41 treesize of output 35 [2022-03-03 19:02:03,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:03,653 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 47 treesize of output 41 [2022-03-03 19:02:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:03,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:04,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:04,480 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 72 treesize of output 65 [2022-03-03 19:02:04,606 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:04,606 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:02:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:04,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086042541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:04,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:04,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:02:04,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704529251] [2022-03-03 19:02:04,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:04,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:02:04,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:04,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:02:04,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:04,612 INFO L87 Difference]: Start difference. First operand 1264 states and 4141 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:04,868 INFO L93 Difference]: Finished difference Result 1477 states and 4732 transitions. [2022-03-03 19:02:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:02:04,869 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:04,871 INFO L225 Difference]: With dead ends: 1477 [2022-03-03 19:02:04,871 INFO L226 Difference]: Without dead ends: 1403 [2022-03-03 19:02:04,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:02:04,871 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:04,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 209 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 478 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-03-03 19:02:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-03-03 19:02:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1261. [2022-03-03 19:02:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.2785714285714285) internal successors, (4131), 1260 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4131 transitions. [2022-03-03 19:02:04,886 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4131 transitions. Word has length 24 [2022-03-03 19:02:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:04,886 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 4131 transitions. [2022-03-03 19:02:04,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4131 transitions. [2022-03-03 19:02:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:04,888 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:04,888 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:04,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:05,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-03 19:02:05,089 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1130085469, now seen corresponding path program 91 times [2022-03-03 19:02:05,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:05,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703156842] [2022-03-03 19:02:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:05,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:05,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703156842] [2022-03-03 19:02:05,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703156842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:05,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65174227] [2022-03-03 19:02:05,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:02:05,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:05,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:05,258 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) [2022-03-03 19:02:05,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 19:02:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:05,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:05,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:05,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:05,461 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 [2022-03-03 19:02:05,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:05,537 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 29 treesize of output 23 [2022-03-03 19:02:05,539 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 22 treesize of output 14 [2022-03-03 19:02:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:05,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:06,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:06,127 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 111 treesize of output 97 [2022-03-03 19:02:06,369 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:06,370 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 32 treesize of output 29 [2022-03-03 19:02:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:06,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65174227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:06,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:06,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:02:06,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26997775] [2022-03-03 19:02:06,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:06,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:02:06,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:02:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:06,375 INFO L87 Difference]: Start difference. First operand 1261 states and 4131 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:06,638 INFO L93 Difference]: Finished difference Result 1428 states and 4596 transitions. [2022-03-03 19:02:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:02:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:06,641 INFO L225 Difference]: With dead ends: 1428 [2022-03-03 19:02:06,641 INFO L226 Difference]: Without dead ends: 1368 [2022-03-03 19:02:06,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:02:06,641 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:06,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 257 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 524 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2022-03-03 19:02:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-03-03 19:02:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1252. [2022-03-03 19:02:06,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.2765787370103916) internal successors, (4099), 1251 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4099 transitions. [2022-03-03 19:02:06,656 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4099 transitions. Word has length 24 [2022-03-03 19:02:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:06,656 INFO L470 AbstractCegarLoop]: Abstraction has 1252 states and 4099 transitions. [2022-03-03 19:02:06,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4099 transitions. [2022-03-03 19:02:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:06,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:06,658 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:06,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-03 19:02:06,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:06,858 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:06,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1313857023, now seen corresponding path program 92 times [2022-03-03 19:02:06,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:06,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477073564] [2022-03-03 19:02:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:06,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:07,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:07,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477073564] [2022-03-03 19:02:07,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477073564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:07,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489625459] [2022-03-03 19:02:07,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:02:07,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:07,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:07,019 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) [2022-03-03 19:02:07,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 19:02:07,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:02:07,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:07,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:07,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:07,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:07,226 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 23 treesize of output 19 [2022-03-03 19:02:07,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:07,314 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:02:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:07,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:07,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:07,876 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-03-03 19:02:08,058 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:08,059 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 28 treesize of output 25 [2022-03-03 19:02:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:08,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489625459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:08,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:08,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:08,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988101161] [2022-03-03 19:02:08,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:08,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:08,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:08,064 INFO L87 Difference]: Start difference. First operand 1252 states and 4099 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:08,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:08,607 INFO L93 Difference]: Finished difference Result 1544 states and 4919 transitions. [2022-03-03 19:02:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:02:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:08,609 INFO L225 Difference]: With dead ends: 1544 [2022-03-03 19:02:08,609 INFO L226 Difference]: Without dead ends: 1431 [2022-03-03 19:02:08,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:02:08,609 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 123 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:08,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 193 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 428 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-03-03 19:02:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-03-03 19:02:08,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1270. [2022-03-03 19:02:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.2781717888100865) internal successors, (4160), 1269 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4160 transitions. [2022-03-03 19:02:08,625 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4160 transitions. Word has length 24 [2022-03-03 19:02:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:08,625 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 4160 transitions. [2022-03-03 19:02:08,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4160 transitions. [2022-03-03 19:02:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:08,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:08,627 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:08,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:08,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:08,827 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:08,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1355475177, now seen corresponding path program 93 times [2022-03-03 19:02:08,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:08,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738892710] [2022-03-03 19:02:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:08,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:08,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:08,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738892710] [2022-03-03 19:02:08,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738892710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:08,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556701849] [2022-03-03 19:02:08,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:02:08,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:08,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:08,967 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) [2022-03-03 19:02:08,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 19:02:08,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:02:08,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:08,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:08,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:09,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:09,216 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 23 treesize of output 19 [2022-03-03 19:02:09,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:09,249 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 23 treesize of output 19 [2022-03-03 19:02:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:09,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:09,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:09,695 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 81 treesize of output 74 [2022-03-03 19:02:09,866 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:09,866 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 28 treesize of output 25 [2022-03-03 19:02:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:09,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556701849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:09,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:09,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:09,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207270797] [2022-03-03 19:02:09,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:09,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:09,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:09,872 INFO L87 Difference]: Start difference. First operand 1270 states and 4160 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:10,060 INFO L93 Difference]: Finished difference Result 1391 states and 4516 transitions. [2022-03-03 19:02:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:02:10,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:10,062 INFO L225 Difference]: With dead ends: 1391 [2022-03-03 19:02:10,062 INFO L226 Difference]: Without dead ends: 1372 [2022-03-03 19:02:10,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:10,062 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:10,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 226 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 456 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-03-03 19:02:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-03-03 19:02:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1276. [2022-03-03 19:02:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.2823529411764705) internal successors, (4185), 1275 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4185 transitions. [2022-03-03 19:02:10,077 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4185 transitions. Word has length 24 [2022-03-03 19:02:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:10,077 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 4185 transitions. [2022-03-03 19:02:10,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4185 transitions. [2022-03-03 19:02:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:10,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:10,079 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:10,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-03 19:02:10,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:10,279 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash -914107055, now seen corresponding path program 94 times [2022-03-03 19:02:10,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:10,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974923934] [2022-03-03 19:02:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:10,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:10,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:10,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974923934] [2022-03-03 19:02:10,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974923934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:10,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770517977] [2022-03-03 19:02:10,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:02:10,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:10,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:10,433 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) [2022-03-03 19:02:10,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 19:02:10,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:02:10,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:10,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:10,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:10,681 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 23 treesize of output 19 [2022-03-03 19:02:10,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:10,743 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 23 treesize of output 19 [2022-03-03 19:02:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:10,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:11,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:11,265 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 110 treesize of output 98 [2022-03-03 19:02:11,565 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:11,565 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 32 treesize of output 29 [2022-03-03 19:02:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:11,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770517977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:11,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:11,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:02:11,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227241999] [2022-03-03 19:02:11,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:11,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:02:11,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:02:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:02:11,570 INFO L87 Difference]: Start difference. First operand 1276 states and 4185 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:12,437 INFO L93 Difference]: Finished difference Result 1720 states and 5393 transitions. [2022-03-03 19:02:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:02:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:12,440 INFO L225 Difference]: With dead ends: 1720 [2022-03-03 19:02:12,440 INFO L226 Difference]: Without dead ends: 1586 [2022-03-03 19:02:12,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:02:12,440 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:12,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 311 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 745 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-03-03 19:02:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-03-03 19:02:12,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1277. [2022-03-03 19:02:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.282131661442006) internal successors, (4188), 1276 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 4188 transitions. [2022-03-03 19:02:12,455 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 4188 transitions. Word has length 24 [2022-03-03 19:02:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:12,455 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 4188 transitions. [2022-03-03 19:02:12,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 4188 transitions. [2022-03-03 19:02:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:12,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:12,457 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:12,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-03 19:02:12,657 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,SelfDestructingSolverStorable109 [2022-03-03 19:02:12,658 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:12,658 INFO L85 PathProgramCache]: Analyzing trace with hash -802874511, now seen corresponding path program 95 times [2022-03-03 19:02:12,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:12,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488091245] [2022-03-03 19:02:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:12,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:12,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:12,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488091245] [2022-03-03 19:02:12,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488091245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:12,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366794150] [2022-03-03 19:02:12,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:02:12,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:12,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:12,795 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) [2022-03-03 19:02:12,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 19:02:12,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:02:12,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:12,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:12,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:12,965 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 [2022-03-03 19:02:13,016 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 [2022-03-03 19:02:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:13,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:13,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:13,635 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 143 treesize of output 123 [2022-03-03 19:02:13,886 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:13,887 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 28 treesize of output 25 [2022-03-03 19:02:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:13,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366794150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:13,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:13,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:13,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104550509] [2022-03-03 19:02:13,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:13,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:13,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:13,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:13,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:13,891 INFO L87 Difference]: Start difference. First operand 1277 states and 4188 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:02:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:14,522 INFO L93 Difference]: Finished difference Result 1596 states and 5096 transitions. [2022-03-03 19:02:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:02:14,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) Word has length 24 [2022-03-03 19:02:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:14,525 INFO L225 Difference]: With dead ends: 1596 [2022-03-03 19:02:14,525 INFO L226 Difference]: Without dead ends: 1520 [2022-03-03 19:02:14,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:02:14,525 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:14,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 280 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:02:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-03-03 19:02:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1305. [2022-03-03 19:02:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.285276073619632) internal successors, (4284), 1304 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4284 transitions. [2022-03-03 19:02:14,541 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4284 transitions. Word has length 24 [2022-03-03 19:02:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:14,541 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 4284 transitions. [2022-03-03 19:02:14,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:02:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4284 transitions. [2022-03-03 19:02:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:14,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:14,543 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:14,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-03 19:02:14,743 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,SelfDestructingSolverStorable110 [2022-03-03 19:02:14,743 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:14,744 INFO L85 PathProgramCache]: Analyzing trace with hash 658193683, now seen corresponding path program 96 times [2022-03-03 19:02:14,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:14,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520261497] [2022-03-03 19:02:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:14,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:14,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:14,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520261497] [2022-03-03 19:02:14,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520261497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:14,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454315610] [2022-03-03 19:02:14,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:02:14,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:14,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:14,978 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) [2022-03-03 19:02:14,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 19:02:15,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:02:15,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:15,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:15,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:15,188 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 41 treesize of output 35 [2022-03-03 19:02:15,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:15,279 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 24 treesize of output 20 [2022-03-03 19:02:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:15,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:16,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:16,044 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 143 treesize of output 123 [2022-03-03 19:02:16,279 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:16,279 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 28 treesize of output 25 [2022-03-03 19:02:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:16,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454315610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:16,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:16,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:02:16,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568835051] [2022-03-03 19:02:16,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:16,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:02:16,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:02:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:16,285 INFO L87 Difference]: Start difference. First operand 1305 states and 4284 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:16,844 INFO L93 Difference]: Finished difference Result 1534 states and 4943 transitions. [2022-03-03 19:02:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:02:16,844 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:16,846 INFO L225 Difference]: With dead ends: 1534 [2022-03-03 19:02:16,847 INFO L226 Difference]: Without dead ends: 1496 [2022-03-03 19:02:16,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:02:16,847 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:16,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 219 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 409 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-03-03 19:02:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-03-03 19:02:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1313. [2022-03-03 19:02:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 3.2934451219512195) internal successors, (4321), 1312 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 4321 transitions. [2022-03-03 19:02:16,862 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 4321 transitions. Word has length 24 [2022-03-03 19:02:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:16,862 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 4321 transitions. [2022-03-03 19:02:16,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 4321 transitions. [2022-03-03 19:02:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:16,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:16,864 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:16,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-03 19:02:17,065 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,SelfDestructingSolverStorable111 [2022-03-03 19:02:17,065 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951773, now seen corresponding path program 97 times [2022-03-03 19:02:17,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:17,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705569049] [2022-03-03 19:02:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:17,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:17,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:17,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705569049] [2022-03-03 19:02:17,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705569049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:17,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335730120] [2022-03-03 19:02:17,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:02:17,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:17,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:17,290 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) [2022-03-03 19:02:17,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-03 19:02:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:17,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:17,509 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 41 treesize of output 35 [2022-03-03 19:02:17,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:17,631 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:02:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:17,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:18,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:18,423 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 141 treesize of output 121 [2022-03-03 19:02:18,588 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:18,588 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 28 treesize of output 25 [2022-03-03 19:02:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:18,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335730120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:18,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:18,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:02:18,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103152113] [2022-03-03 19:02:18,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:18,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:02:18,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:02:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:18,594 INFO L87 Difference]: Start difference. First operand 1313 states and 4321 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:18,814 INFO L93 Difference]: Finished difference Result 1427 states and 4651 transitions. [2022-03-03 19:02:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:02:18,814 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:18,816 INFO L225 Difference]: With dead ends: 1427 [2022-03-03 19:02:18,816 INFO L226 Difference]: Without dead ends: 1408 [2022-03-03 19:02:18,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:02:18,817 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:18,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 195 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 447 Invalid, 0 Unknown, 382 Unchecked, 0.2s Time] [2022-03-03 19:02:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-03-03 19:02:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1304. [2022-03-03 19:02:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.280890253261704) internal successors, (4275), 1303 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 4275 transitions. [2022-03-03 19:02:18,831 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 4275 transitions. Word has length 24 [2022-03-03 19:02:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:18,831 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 4275 transitions. [2022-03-03 19:02:18,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 4275 transitions. [2022-03-03 19:02:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:18,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:18,833 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:18,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:19,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:19,034 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:19,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash 217385837, now seen corresponding path program 98 times [2022-03-03 19:02:19,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:19,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879617540] [2022-03-03 19:02:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:19,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:19,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879617540] [2022-03-03 19:02:19,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879617540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:19,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744415204] [2022-03-03 19:02:19,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:02:19,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:19,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:19,249 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) [2022-03-03 19:02:19,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-03 19:02:19,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:02:19,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:19,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:19,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:19,433 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 41 treesize of output 35 [2022-03-03 19:02:19,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:19,591 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 24 treesize of output 20 [2022-03-03 19:02:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:19,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:20,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:20,340 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 141 treesize of output 121 [2022-03-03 19:02:20,499 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:20,499 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:02:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:20,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744415204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:20,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:20,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:20,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338269171] [2022-03-03 19:02:20,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:20,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:20,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:20,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:20,504 INFO L87 Difference]: Start difference. First operand 1304 states and 4275 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:20,711 INFO L93 Difference]: Finished difference Result 1404 states and 4569 transitions. [2022-03-03 19:02:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:02:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:20,714 INFO L225 Difference]: With dead ends: 1404 [2022-03-03 19:02:20,714 INFO L226 Difference]: Without dead ends: 1389 [2022-03-03 19:02:20,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:20,714 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:20,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 219 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 468 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-03-03 19:02:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-03-03 19:02:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1306. [2022-03-03 19:02:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.281992337164751) internal successors, (4283), 1305 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4283 transitions. [2022-03-03 19:02:20,729 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4283 transitions. Word has length 24 [2022-03-03 19:02:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:20,729 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 4283 transitions. [2022-03-03 19:02:20,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4283 transitions. [2022-03-03 19:02:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:20,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:20,731 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:20,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-03 19:02:20,931 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,SelfDestructingSolverStorable113 [2022-03-03 19:02:20,931 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:20,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1461825297, now seen corresponding path program 99 times [2022-03-03 19:02:20,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:20,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648828676] [2022-03-03 19:02:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:20,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:21,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:21,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648828676] [2022-03-03 19:02:21,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648828676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:21,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573131955] [2022-03-03 19:02:21,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:02:21,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:21,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:21,164 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) [2022-03-03 19:02:21,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-03 19:02:21,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:02:21,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:21,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:21,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:21,362 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 41 treesize of output 35 [2022-03-03 19:02:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:21,546 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 24 treesize of output 20 [2022-03-03 19:02:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:21,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:22,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:22,273 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:02:22,429 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:22,429 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 28 treesize of output 25 [2022-03-03 19:02:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:22,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573131955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:22,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:22,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:22,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220869996] [2022-03-03 19:02:22,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:22,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:22,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:22,435 INFO L87 Difference]: Start difference. First operand 1306 states and 4283 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:22,604 INFO L93 Difference]: Finished difference Result 1392 states and 4535 transitions. [2022-03-03 19:02:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:02:22,605 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:22,607 INFO L225 Difference]: With dead ends: 1392 [2022-03-03 19:02:22,607 INFO L226 Difference]: Without dead ends: 1385 [2022-03-03 19:02:22,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:22,607 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:22,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 166 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 363 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-03-03 19:02:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-03-03 19:02:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1306. [2022-03-03 19:02:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.281992337164751) internal successors, (4283), 1305 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4283 transitions. [2022-03-03 19:02:22,621 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4283 transitions. Word has length 24 [2022-03-03 19:02:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:22,622 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 4283 transitions. [2022-03-03 19:02:22,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4283 transitions. [2022-03-03 19:02:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:22,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:22,623 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:22,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-03 19:02:22,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-03 19:02:22,824 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:22,824 INFO L85 PathProgramCache]: Analyzing trace with hash -890370491, now seen corresponding path program 100 times [2022-03-03 19:02:22,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:22,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151211058] [2022-03-03 19:02:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:22,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:22,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:22,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151211058] [2022-03-03 19:02:22,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151211058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:22,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870310212] [2022-03-03 19:02:22,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:02:22,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:22,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:22,993 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) [2022-03-03 19:02:22,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-03 19:02:23,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:02:23,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:23,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:23,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:23,185 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:02:23,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:23,413 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:02:23,415 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 22 treesize of output 14 [2022-03-03 19:02:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:23,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:24,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:24,067 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 141 treesize of output 121 [2022-03-03 19:02:24,227 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:24,228 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 28 treesize of output 25 [2022-03-03 19:02:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:24,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870310212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:24,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:24,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:24,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116050348] [2022-03-03 19:02:24,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:24,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:24,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:24,233 INFO L87 Difference]: Start difference. First operand 1306 states and 4283 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:24,443 INFO L93 Difference]: Finished difference Result 1535 states and 4880 transitions. [2022-03-03 19:02:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:02:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:24,445 INFO L225 Difference]: With dead ends: 1535 [2022-03-03 19:02:24,446 INFO L226 Difference]: Without dead ends: 1450 [2022-03-03 19:02:24,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:02:24,446 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:24,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 174 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-03-03 19:02:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2022-03-03 19:02:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1335. [2022-03-03 19:02:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.266866566716642) internal successors, (4358), 1334 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4358 transitions. [2022-03-03 19:02:24,461 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4358 transitions. Word has length 24 [2022-03-03 19:02:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:24,461 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 4358 transitions. [2022-03-03 19:02:24,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4358 transitions. [2022-03-03 19:02:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:24,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:24,462 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:24,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-03 19:02:24,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:24,663 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:24,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1860231365, now seen corresponding path program 101 times [2022-03-03 19:02:24,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:24,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254437089] [2022-03-03 19:02:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:24,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:24,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:24,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254437089] [2022-03-03 19:02:24,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254437089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:24,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510680535] [2022-03-03 19:02:24,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:02:24,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:24,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:24,835 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) [2022-03-03 19:02:24,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-03 19:02:24,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:02:24,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:25,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:25,015 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:02:25,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:25,224 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 29 treesize of output 23 [2022-03-03 19:02:25,226 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 [2022-03-03 19:02:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:25,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:25,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:25,868 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-03 19:02:26,107 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:26,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 29 [2022-03-03 19:02:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:26,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510680535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:26,112 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:26,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:02:26,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353950824] [2022-03-03 19:02:26,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:26,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:02:26,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:02:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:02:26,113 INFO L87 Difference]: Start difference. First operand 1335 states and 4358 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:26,352 INFO L93 Difference]: Finished difference Result 1477 states and 4711 transitions. [2022-03-03 19:02:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:02:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:26,354 INFO L225 Difference]: With dead ends: 1477 [2022-03-03 19:02:26,354 INFO L226 Difference]: Without dead ends: 1366 [2022-03-03 19:02:26,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:02:26,355 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:26,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 240 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 484 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-03-03 19:02:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2022-03-03 19:02:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1308. [2022-03-03 19:02:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.2769701606732977) internal successors, (4283), 1307 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 4283 transitions. [2022-03-03 19:02:26,369 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 4283 transitions. Word has length 24 [2022-03-03 19:02:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:26,369 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 4283 transitions. [2022-03-03 19:02:26,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 4283 transitions. [2022-03-03 19:02:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:26,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:26,371 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:26,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-03 19:02:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:26,572 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash -685763075, now seen corresponding path program 102 times [2022-03-03 19:02:26,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:26,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672649738] [2022-03-03 19:02:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:26,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:26,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:26,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672649738] [2022-03-03 19:02:26,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672649738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:26,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767463686] [2022-03-03 19:02:26,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:02:26,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:26,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:26,736 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) [2022-03-03 19:02:26,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-03 19:02:26,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:02:26,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:26,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:26,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:26,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:26,916 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 41 treesize of output 35 [2022-03-03 19:02:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:27,032 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 24 treesize of output 20 [2022-03-03 19:02:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:27,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:27,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:27,546 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-03-03 19:02:27,747 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:27,747 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 32 treesize of output 29 [2022-03-03 19:02:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:27,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767463686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:27,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:27,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:02:27,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586173214] [2022-03-03 19:02:27,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:27,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:02:27,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:27,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:02:27,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:02:27,753 INFO L87 Difference]: Start difference. First operand 1308 states and 4283 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:28,099 INFO L93 Difference]: Finished difference Result 1522 states and 4833 transitions. [2022-03-03 19:02:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:02:28,099 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:28,101 INFO L225 Difference]: With dead ends: 1522 [2022-03-03 19:02:28,101 INFO L226 Difference]: Without dead ends: 1434 [2022-03-03 19:02:28,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:02:28,102 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:28,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 243 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 581 Invalid, 0 Unknown, 310 Unchecked, 0.2s Time] [2022-03-03 19:02:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-03-03 19:02:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1308. [2022-03-03 19:02:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.2746748278500384) internal successors, (4280), 1307 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 4280 transitions. [2022-03-03 19:02:28,117 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 4280 transitions. Word has length 24 [2022-03-03 19:02:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:28,117 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 4280 transitions. [2022-03-03 19:02:28,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 4280 transitions. [2022-03-03 19:02:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:28,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:28,119 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:28,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:28,319 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,SelfDestructingSolverStorable117 [2022-03-03 19:02:28,319 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2041051857, now seen corresponding path program 103 times [2022-03-03 19:02:28,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:28,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060956118] [2022-03-03 19:02:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:28,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:28,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:28,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060956118] [2022-03-03 19:02:28,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060956118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:28,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835479077] [2022-03-03 19:02:28,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:02:28,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:28,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:28,479 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) [2022-03-03 19:02:28,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-03 19:02:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:28,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:28,588 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 [2022-03-03 19:02:28,720 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 [2022-03-03 19:02:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:28,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:29,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:29,403 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-03-03 19:02:29,650 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:29,650 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-03 19:02:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:29,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835479077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:29,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:29,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:29,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656455992] [2022-03-03 19:02:29,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:29,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:29,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:29,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:29,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:29,655 INFO L87 Difference]: Start difference. First operand 1308 states and 4280 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:31,166 INFO L93 Difference]: Finished difference Result 2006 states and 6234 transitions. [2022-03-03 19:02:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:02:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:31,169 INFO L225 Difference]: With dead ends: 2006 [2022-03-03 19:02:31,169 INFO L226 Difference]: Without dead ends: 1853 [2022-03-03 19:02:31,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:02:31,169 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 160 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:31,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 419 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:02:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2022-03-03 19:02:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1301. [2022-03-03 19:02:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.276153846153846) internal successors, (4259), 1300 states have internal predecessors, (4259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4259 transitions. [2022-03-03 19:02:31,186 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4259 transitions. Word has length 24 [2022-03-03 19:02:31,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:31,186 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 4259 transitions. [2022-03-03 19:02:31,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4259 transitions. [2022-03-03 19:02:31,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:31,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:31,188 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:31,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:31,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:31,389 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1179511201, now seen corresponding path program 104 times [2022-03-03 19:02:31,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:31,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921845577] [2022-03-03 19:02:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:31,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:31,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:31,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921845577] [2022-03-03 19:02:31,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921845577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:31,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502947420] [2022-03-03 19:02:31,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:02:31,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:31,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:31,590 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) [2022-03-03 19:02:31,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-03 19:02:31,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:02:31,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:31,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:31,731 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 41 treesize of output 35 [2022-03-03 19:02:31,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:31,843 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 43 treesize of output 37 [2022-03-03 19:02:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:32,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:32,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:32,732 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 120 treesize of output 104 [2022-03-03 19:02:32,867 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:32,868 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:02:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:32,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502947420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:32,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:32,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:02:32,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007259356] [2022-03-03 19:02:32,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:32,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:02:32,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:02:32,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:32,873 INFO L87 Difference]: Start difference. First operand 1301 states and 4259 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:33,157 INFO L93 Difference]: Finished difference Result 1489 states and 4787 transitions. [2022-03-03 19:02:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:02:33,158 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:33,160 INFO L225 Difference]: With dead ends: 1489 [2022-03-03 19:02:33,160 INFO L226 Difference]: Without dead ends: 1451 [2022-03-03 19:02:33,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:02:33,161 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:33,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 211 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 440 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-03-03 19:02:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-03-03 19:02:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1304. [2022-03-03 19:02:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.278587874136608) internal successors, (4272), 1303 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 4272 transitions. [2022-03-03 19:02:33,176 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 4272 transitions. Word has length 24 [2022-03-03 19:02:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:33,176 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 4272 transitions. [2022-03-03 19:02:33,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 4272 transitions. [2022-03-03 19:02:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:33,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:33,177 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:33,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-03 19:02:33,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:33,378 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash -484573687, now seen corresponding path program 105 times [2022-03-03 19:02:33,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:33,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25309096] [2022-03-03 19:02:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:33,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:33,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:33,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25309096] [2022-03-03 19:02:33,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25309096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:33,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155410168] [2022-03-03 19:02:33,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:02:33,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:33,569 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) [2022-03-03 19:02:33,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-03 19:02:33,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:02:33,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:33,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:33,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:33,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:02:33,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:33,890 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-03 19:02:33,892 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 11 treesize of output 7 [2022-03-03 19:02:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:33,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:34,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:34,483 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2022-03-03 19:02:34,529 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:34,530 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 [2022-03-03 19:02:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:34,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155410168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:34,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:34,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:34,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460814320] [2022-03-03 19:02:34,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:34,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:34,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:34,535 INFO L87 Difference]: Start difference. First operand 1304 states and 4272 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:34,765 INFO L93 Difference]: Finished difference Result 1407 states and 4565 transitions. [2022-03-03 19:02:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:02:34,766 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:34,768 INFO L225 Difference]: With dead ends: 1407 [2022-03-03 19:02:34,768 INFO L226 Difference]: Without dead ends: 1400 [2022-03-03 19:02:34,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:02:34,768 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:34,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 231 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 212 Unchecked, 0.1s Time] [2022-03-03 19:02:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-03-03 19:02:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1311. [2022-03-03 19:02:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.282442748091603) internal successors, (4300), 1310 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4300 transitions. [2022-03-03 19:02:34,783 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4300 transitions. Word has length 24 [2022-03-03 19:02:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:34,783 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 4300 transitions. [2022-03-03 19:02:34,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4300 transitions. [2022-03-03 19:02:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:34,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:34,785 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:34,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:35,001 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,SelfDestructingSolverStorable120 [2022-03-03 19:02:35,001 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:35,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1159955615, now seen corresponding path program 106 times [2022-03-03 19:02:35,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:35,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726600901] [2022-03-03 19:02:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:35,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:35,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726600901] [2022-03-03 19:02:35,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726600901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:35,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807049961] [2022-03-03 19:02:35,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:02:35,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:35,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:35,202 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) [2022-03-03 19:02:35,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-03 19:02:35,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:02:35,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:35,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:35,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:35,342 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 [2022-03-03 19:02:35,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:35,628 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 29 treesize of output 23 [2022-03-03 19:02:35,630 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 22 treesize of output 14 [2022-03-03 19:02:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:35,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:36,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:36,288 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 78 treesize of output 70 [2022-03-03 19:02:36,425 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:36,426 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 32 treesize of output 29 [2022-03-03 19:02:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:36,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807049961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:36,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:36,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 19:02:36,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969375440] [2022-03-03 19:02:36,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:36,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:02:36,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:02:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:02:36,431 INFO L87 Difference]: Start difference. First operand 1311 states and 4300 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:36,684 INFO L93 Difference]: Finished difference Result 1406 states and 4556 transitions. [2022-03-03 19:02:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:02:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:36,687 INFO L225 Difference]: With dead ends: 1406 [2022-03-03 19:02:36,687 INFO L226 Difference]: Without dead ends: 1393 [2022-03-03 19:02:36,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:02:36,687 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:36,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 262 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 518 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-03-03 19:02:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-03-03 19:02:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1318. [2022-03-03 19:02:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.287775246772969) internal successors, (4330), 1317 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4330 transitions. [2022-03-03 19:02:36,710 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4330 transitions. Word has length 24 [2022-03-03 19:02:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:36,710 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 4330 transitions. [2022-03-03 19:02:36,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4330 transitions. [2022-03-03 19:02:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:36,712 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:36,712 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:36,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:36,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:36,923 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash -627351589, now seen corresponding path program 107 times [2022-03-03 19:02:36,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:36,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270676698] [2022-03-03 19:02:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:36,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:37,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:37,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270676698] [2022-03-03 19:02:37,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270676698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:37,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145779199] [2022-03-03 19:02:37,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:02:37,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:37,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:37,107 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) [2022-03-03 19:02:37,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-03 19:02:37,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:02:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:37,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:37,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:37,242 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 41 treesize of output 35 [2022-03-03 19:02:37,437 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 21 treesize of output 17 [2022-03-03 19:02:37,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:37,439 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 12 treesize of output 3 [2022-03-03 19:02:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:37,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:38,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:38,047 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 50 treesize of output 47 [2022-03-03 19:02:38,120 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:38,120 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-03 19:02:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:38,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145779199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:38,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:38,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:02:38,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041008464] [2022-03-03 19:02:38,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:38,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:02:38,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:02:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:38,126 INFO L87 Difference]: Start difference. First operand 1318 states and 4330 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:38,473 INFO L93 Difference]: Finished difference Result 1450 states and 4702 transitions. [2022-03-03 19:02:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:02:38,474 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:38,476 INFO L225 Difference]: With dead ends: 1450 [2022-03-03 19:02:38,476 INFO L226 Difference]: Without dead ends: 1443 [2022-03-03 19:02:38,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:02:38,476 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 603 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:38,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 292 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 524 Invalid, 0 Unknown, 603 Unchecked, 0.2s Time] [2022-03-03 19:02:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-03-03 19:02:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1301. [2022-03-03 19:02:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.2992307692307694) internal successors, (4289), 1300 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4289 transitions. [2022-03-03 19:02:38,491 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4289 transitions. Word has length 24 [2022-03-03 19:02:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:38,491 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 4289 transitions. [2022-03-03 19:02:38,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4289 transitions. [2022-03-03 19:02:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:38,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:38,492 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:38,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:38,693 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,SelfDestructingSolverStorable122 [2022-03-03 19:02:38,693 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:38,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1250042915, now seen corresponding path program 108 times [2022-03-03 19:02:38,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:38,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420529891] [2022-03-03 19:02:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:38,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:38,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:38,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420529891] [2022-03-03 19:02:38,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420529891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:38,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943309741] [2022-03-03 19:02:38,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:02:38,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:38,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:38,888 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) [2022-03-03 19:02:38,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-03 19:02:38,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:02:38,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:02:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:39,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:39,028 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 41 treesize of output 35 [2022-03-03 19:02:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:39,269 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:02:39,271 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 22 treesize of output 14 [2022-03-03 19:02:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:39,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:39,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:39,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 98 [2022-03-03 19:02:39,990 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:39,990 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 28 treesize of output 25 [2022-03-03 19:02:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:02:39,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943309741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:39,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:39,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:02:39,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923787488] [2022-03-03 19:02:39,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:39,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:02:39,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:02:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:02:39,996 INFO L87 Difference]: Start difference. First operand 1301 states and 4289 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2022-03-03 19:02:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:40,254 INFO L93 Difference]: Finished difference Result 1453 states and 4683 transitions. [2022-03-03 19:02:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:02:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 24 [2022-03-03 19:02:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:40,256 INFO L225 Difference]: With dead ends: 1453 [2022-03-03 19:02:40,256 INFO L226 Difference]: Without dead ends: 1378 [2022-03-03 19:02:40,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:40,257 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:40,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 293 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 495 Invalid, 0 Unknown, 423 Unchecked, 0.2s Time] [2022-03-03 19:02:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-03-03 19:02:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1291. [2022-03-03 19:02:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.2868217054263567) internal successors, (4240), 1290 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 4240 transitions. [2022-03-03 19:02:40,271 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 4240 transitions. Word has length 24 [2022-03-03 19:02:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:40,271 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 4240 transitions. [2022-03-03 19:02:40,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2022-03-03 19:02:40,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 4240 transitions. [2022-03-03 19:02:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:40,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:40,273 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:40,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-03 19:02:40,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:40,473 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:40,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1597519505, now seen corresponding path program 109 times [2022-03-03 19:02:40,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:40,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991208334] [2022-03-03 19:02:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:40,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:40,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:40,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991208334] [2022-03-03 19:02:40,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991208334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:40,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932455640] [2022-03-03 19:02:40,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:02:40,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:40,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:40,678 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) [2022-03-03 19:02:40,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-03 19:02:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:40,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:40,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:40,791 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 [2022-03-03 19:02:40,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:40,932 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 43 treesize of output 37 [2022-03-03 19:02:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:41,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:41,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:41,818 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-03-03 19:02:41,928 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:41,928 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 32 treesize of output 29 [2022-03-03 19:02:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:41,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932455640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:41,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:41,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:02:41,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455131576] [2022-03-03 19:02:41,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:41,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:02:41,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:02:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:41,933 INFO L87 Difference]: Start difference. First operand 1291 states and 4240 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:42,951 INFO L93 Difference]: Finished difference Result 1957 states and 5983 transitions. [2022-03-03 19:02:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:02:42,951 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:42,954 INFO L225 Difference]: With dead ends: 1957 [2022-03-03 19:02:42,954 INFO L226 Difference]: Without dead ends: 1787 [2022-03-03 19:02:42,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:02:42,955 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 218 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:42,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 352 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 594 Invalid, 0 Unknown, 172 Unchecked, 0.3s Time] [2022-03-03 19:02:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2022-03-03 19:02:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1296. [2022-03-03 19:02:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.288030888030888) internal successors, (4258), 1295 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4258 transitions. [2022-03-03 19:02:42,972 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4258 transitions. Word has length 24 [2022-03-03 19:02:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:42,973 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 4258 transitions. [2022-03-03 19:02:42,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4258 transitions. [2022-03-03 19:02:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:42,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:42,974 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:42,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-03 19:02:43,175 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,SelfDestructingSolverStorable124 [2022-03-03 19:02:43,175 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:43,175 INFO L85 PathProgramCache]: Analyzing trace with hash -614614815, now seen corresponding path program 110 times [2022-03-03 19:02:43,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:43,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190425644] [2022-03-03 19:02:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:43,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:43,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:43,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190425644] [2022-03-03 19:02:43,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190425644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:43,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087240569] [2022-03-03 19:02:43,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:02:43,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:43,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:43,396 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) [2022-03-03 19:02:43,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-03 19:02:43,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:02:43,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:43,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:43,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:43,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:43,514 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 41 treesize of output 35 [2022-03-03 19:02:43,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:43,697 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:02:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:43,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:44,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:44,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-03 19:02:44,660 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:02:44,661 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 25 [2022-03-03 19:02:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:44,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087240569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:44,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:44,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:02:44,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158455961] [2022-03-03 19:02:44,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:44,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:02:44,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:02:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:02:44,666 INFO L87 Difference]: Start difference. First operand 1296 states and 4258 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:44,855 INFO L93 Difference]: Finished difference Result 1435 states and 4675 transitions. [2022-03-03 19:02:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:02:44,855 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:44,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:44,857 INFO L225 Difference]: With dead ends: 1435 [2022-03-03 19:02:44,857 INFO L226 Difference]: Without dead ends: 1416 [2022-03-03 19:02:44,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:02:44,858 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:44,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 185 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 398 Invalid, 0 Unknown, 402 Unchecked, 0.2s Time] [2022-03-03 19:02:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-03-03 19:02:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1288. [2022-03-03 19:02:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.289044289044289) internal successors, (4233), 1287 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4233 transitions. [2022-03-03 19:02:44,872 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4233 transitions. Word has length 24 [2022-03-03 19:02:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:44,872 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 4233 transitions. [2022-03-03 19:02:44,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4233 transitions. [2022-03-03 19:02:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:44,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:44,874 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:44,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:45,074 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,SelfDestructingSolverStorable125 [2022-03-03 19:02:45,074 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:45,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1839078163, now seen corresponding path program 111 times [2022-03-03 19:02:45,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:45,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463550624] [2022-03-03 19:02:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:45,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:45,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:45,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463550624] [2022-03-03 19:02:45,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463550624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:45,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481706756] [2022-03-03 19:02:45,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:02:45,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:45,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:45,241 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) [2022-03-03 19:02:45,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-03 19:02:45,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:02:45,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:45,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:45,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:45,337 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-03 19:02:45,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:45,459 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-03 19:02:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:45,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:45,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:45,859 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-03 19:02:45,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:45,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-03-03 19:02:45,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:45,998 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 41 treesize of output 38 [2022-03-03 19:02:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:46,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481706756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:46,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:46,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:46,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706210879] [2022-03-03 19:02:46,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:46,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:46,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:46,032 INFO L87 Difference]: Start difference. First operand 1288 states and 4233 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:46,457 INFO L93 Difference]: Finished difference Result 1516 states and 4901 transitions. [2022-03-03 19:02:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:02:46,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:46,460 INFO L225 Difference]: With dead ends: 1516 [2022-03-03 19:02:46,460 INFO L226 Difference]: Without dead ends: 1467 [2022-03-03 19:02:46,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:02:46,460 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:46,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 434 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 717 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-03-03 19:02:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-03 19:02:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1318. [2022-03-03 19:02:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.2649962034927866) internal successors, (4300), 1317 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4300 transitions. [2022-03-03 19:02:46,475 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4300 transitions. Word has length 24 [2022-03-03 19:02:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:46,476 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 4300 transitions. [2022-03-03 19:02:46,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4300 transitions. [2022-03-03 19:02:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:46,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:46,479 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:46,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-03 19:02:46,680 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,SelfDestructingSolverStorable126 [2022-03-03 19:02:46,682 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:46,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:46,682 INFO L85 PathProgramCache]: Analyzing trace with hash 3177783, now seen corresponding path program 112 times [2022-03-03 19:02:46,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:46,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081863260] [2022-03-03 19:02:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:46,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:46,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:46,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081863260] [2022-03-03 19:02:46,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081863260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:46,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973809541] [2022-03-03 19:02:46,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:02:46,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:46,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:46,858 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) [2022-03-03 19:02:46,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-03 19:02:46,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:02:46,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:46,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:46,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:46,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:46,967 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 47 treesize of output 39 [2022-03-03 19:02:47,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:47,114 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-03 19:02:47,116 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 [2022-03-03 19:02:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:47,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:47,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:47,465 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 36 treesize of output 38 [2022-03-03 19:02:47,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:47,590 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 81 treesize of output 73 [2022-03-03 19:02:47,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:47,596 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-03-03 19:02:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:47,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973809541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:47,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:47,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:47,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629290700] [2022-03-03 19:02:47,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:47,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:47,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:47,661 INFO L87 Difference]: Start difference. First operand 1318 states and 4300 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:48,289 INFO L93 Difference]: Finished difference Result 1687 states and 5323 transitions. [2022-03-03 19:02:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:02:48,289 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:48,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:48,292 INFO L225 Difference]: With dead ends: 1687 [2022-03-03 19:02:48,292 INFO L226 Difference]: Without dead ends: 1623 [2022-03-03 19:02:48,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:02:48,293 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 110 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:48,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 309 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 666 Invalid, 0 Unknown, 292 Unchecked, 0.3s Time] [2022-03-03 19:02:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-03-03 19:02:48,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1321. [2022-03-03 19:02:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 3.265909090909091) internal successors, (4311), 1320 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 4311 transitions. [2022-03-03 19:02:48,323 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 4311 transitions. Word has length 24 [2022-03-03 19:02:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:48,324 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 4311 transitions. [2022-03-03 19:02:48,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 4311 transitions. [2022-03-03 19:02:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:48,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:48,326 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:48,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:48,539 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,SelfDestructingSolverStorable127 [2022-03-03 19:02:48,539 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:48,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash -263182055, now seen corresponding path program 113 times [2022-03-03 19:02:48,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:48,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575870630] [2022-03-03 19:02:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:48,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:48,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575870630] [2022-03-03 19:02:48,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575870630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:48,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978148537] [2022-03-03 19:02:48,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:02:48,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:48,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:48,662 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) [2022-03-03 19:02:48,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-03 19:02:48,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:02:48,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:48,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:48,743 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 48 treesize of output 40 [2022-03-03 19:02:48,904 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 [2022-03-03 19:02:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:48,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:49,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:49,309 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 36 treesize of output 38 [2022-03-03 19:02:49,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:49,431 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 58 treesize of output 55 [2022-03-03 19:02:49,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:49,436 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 46 treesize of output 43 [2022-03-03 19:02:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:49,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978148537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:49,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:49,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-03 19:02:49,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294378351] [2022-03-03 19:02:49,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:49,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:02:49,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:49,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:02:49,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:02:49,496 INFO L87 Difference]: Start difference. First operand 1321 states and 4311 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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) [2022-03-03 19:02:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:49,789 INFO L93 Difference]: Finished difference Result 1510 states and 4865 transitions. [2022-03-03 19:02:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:02:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 24 [2022-03-03 19:02:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:49,792 INFO L225 Difference]: With dead ends: 1510 [2022-03-03 19:02:49,792 INFO L226 Difference]: Without dead ends: 1479 [2022-03-03 19:02:49,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:02:49,792 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:49,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 208 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 600 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-03-03 19:02:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2022-03-03 19:02:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1321. [2022-03-03 19:02:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 3.265909090909091) internal successors, (4311), 1320 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 4311 transitions. [2022-03-03 19:02:49,808 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 4311 transitions. Word has length 24 [2022-03-03 19:02:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:49,808 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 4311 transitions. [2022-03-03 19:02:49,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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) [2022-03-03 19:02:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 4311 transitions. [2022-03-03 19:02:49,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:49,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:49,809 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:49,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-03 19:02:50,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:50,010 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:50,010 INFO L85 PathProgramCache]: Analyzing trace with hash 900751119, now seen corresponding path program 114 times [2022-03-03 19:02:50,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:50,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614489644] [2022-03-03 19:02:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:50,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:50,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:50,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614489644] [2022-03-03 19:02:50,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614489644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:50,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763807711] [2022-03-03 19:02:50,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:02:50,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:50,167 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) [2022-03-03 19:02:50,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-03 19:02:50,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:02:50,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:50,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:50,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:50,275 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 47 treesize of output 39 [2022-03-03 19:02:50,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:50,363 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 47 treesize of output 41 [2022-03-03 19:02:50,365 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 [2022-03-03 19:02:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:50,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:50,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:50,953 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-03 19:02:51,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:51,098 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 86 treesize of output 78 [2022-03-03 19:02:51,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:51,103 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 70 treesize of output 62 [2022-03-03 19:02:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:51,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763807711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:51,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:51,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:51,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051389263] [2022-03-03 19:02:51,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:51,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:51,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:51,153 INFO L87 Difference]: Start difference. First operand 1321 states and 4311 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:51,787 INFO L93 Difference]: Finished difference Result 1789 states and 5596 transitions. [2022-03-03 19:02:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:02:51,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:51,790 INFO L225 Difference]: With dead ends: 1789 [2022-03-03 19:02:51,790 INFO L226 Difference]: Without dead ends: 1713 [2022-03-03 19:02:51,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:02:51,790 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:51,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 265 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 870 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-03-03 19:02:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-03-03 19:02:51,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1327. [2022-03-03 19:02:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.262443438914027) internal successors, (4326), 1326 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4326 transitions. [2022-03-03 19:02:51,808 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4326 transitions. Word has length 24 [2022-03-03 19:02:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:51,809 INFO L470 AbstractCegarLoop]: Abstraction has 1327 states and 4326 transitions. [2022-03-03 19:02:51,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4326 transitions. [2022-03-03 19:02:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:51,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:51,810 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:51,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-03 19:02:52,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:52,011 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:52,011 INFO L85 PathProgramCache]: Analyzing trace with hash -263691145, now seen corresponding path program 115 times [2022-03-03 19:02:52,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:52,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953536399] [2022-03-03 19:02:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:52,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:52,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:52,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953536399] [2022-03-03 19:02:52,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953536399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:52,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668872856] [2022-03-03 19:02:52,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:02:52,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:52,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:52,177 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) [2022-03-03 19:02:52,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-03 19:02:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:52,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:52,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:52,274 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 [2022-03-03 19:02:52,340 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 57 treesize of output 47 [2022-03-03 19:02:52,342 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 17 treesize of output 13 [2022-03-03 19:02:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:52,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:52,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:52,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-03-03 19:02:52,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:52,980 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 126 treesize of output 110 [2022-03-03 19:02:52,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:52,985 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 102 treesize of output 86 [2022-03-03 19:02:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:53,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668872856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:53,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:53,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:53,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579547235] [2022-03-03 19:02:53,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:53,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:53,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:53,054 INFO L87 Difference]: Start difference. First operand 1327 states and 4326 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:53,827 INFO L93 Difference]: Finished difference Result 1585 states and 5092 transitions. [2022-03-03 19:02:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:02:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:53,830 INFO L225 Difference]: With dead ends: 1585 [2022-03-03 19:02:53,830 INFO L226 Difference]: Without dead ends: 1550 [2022-03-03 19:02:53,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:02:53,831 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 92 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:53,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 349 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1110 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-03-03 19:02:53,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-03-03 19:02:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1325. [2022-03-03 19:02:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 3.263595166163142) internal successors, (4321), 1324 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 4321 transitions. [2022-03-03 19:02:53,846 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 4321 transitions. Word has length 24 [2022-03-03 19:02:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:53,846 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 4321 transitions. [2022-03-03 19:02:53,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 4321 transitions. [2022-03-03 19:02:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:53,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:53,848 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:53,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-03 19:02:54,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:54,050 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:54,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2022472717, now seen corresponding path program 116 times [2022-03-03 19:02:54,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:54,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648727136] [2022-03-03 19:02:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:54,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:54,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:54,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648727136] [2022-03-03 19:02:54,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648727136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:54,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881716133] [2022-03-03 19:02:54,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:02:54,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:54,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:54,173 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) [2022-03-03 19:02:54,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-03 19:02:54,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:02:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:54,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:54,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:54,256 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 48 treesize of output 40 [2022-03-03 19:02:54,334 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 [2022-03-03 19:02:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:54,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:54,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:54,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 57 [2022-03-03 19:02:54,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:54,948 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 58 treesize of output 55 [2022-03-03 19:02:54,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:54,956 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-03-03 19:02:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:55,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881716133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:55,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:55,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-03 19:02:55,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393162656] [2022-03-03 19:02:55,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:55,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:02:55,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:02:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:02:55,021 INFO L87 Difference]: Start difference. First operand 1325 states and 4321 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-03-03 19:02:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:55,320 INFO L93 Difference]: Finished difference Result 1435 states and 4646 transitions. [2022-03-03 19:02:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:02:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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 24 [2022-03-03 19:02:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:55,323 INFO L225 Difference]: With dead ends: 1435 [2022-03-03 19:02:55,323 INFO L226 Difference]: Without dead ends: 1404 [2022-03-03 19:02:55,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:02:55,323 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:55,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 179 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:02:55,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-03-03 19:02:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1328. [2022-03-03 19:02:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.2629992464204975) internal successors, (4330), 1327 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4330 transitions. [2022-03-03 19:02:55,338 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4330 transitions. Word has length 24 [2022-03-03 19:02:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:55,338 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 4330 transitions. [2022-03-03 19:02:55,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-03-03 19:02:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4330 transitions. [2022-03-03 19:02:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:55,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:55,340 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:55,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-03 19:02:55,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:55,540 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash -858539543, now seen corresponding path program 117 times [2022-03-03 19:02:55,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:55,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193217978] [2022-03-03 19:02:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:55,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:55,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:55,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193217978] [2022-03-03 19:02:55,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193217978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:55,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300363596] [2022-03-03 19:02:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:02:55,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:55,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:55,700 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) [2022-03-03 19:02:55,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-03 19:02:55,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:02:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:02:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:55,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:55,832 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 47 treesize of output 39 [2022-03-03 19:02:55,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:55,879 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 47 treesize of output 41 [2022-03-03 19:02:55,882 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 [2022-03-03 19:02:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:56,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:56,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:56,461 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 57 treesize of output 57 [2022-03-03 19:02:56,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:56,665 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 86 treesize of output 78 [2022-03-03 19:02:56,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:56,671 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 70 treesize of output 62 [2022-03-03 19:02:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:56,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300363596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:56,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:56,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:56,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345366785] [2022-03-03 19:02:56,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:56,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:56,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:56,743 INFO L87 Difference]: Start difference. First operand 1328 states and 4330 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:57,332 INFO L93 Difference]: Finished difference Result 1665 states and 5237 transitions. [2022-03-03 19:02:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:02:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:57,335 INFO L225 Difference]: With dead ends: 1665 [2022-03-03 19:02:57,335 INFO L226 Difference]: Without dead ends: 1589 [2022-03-03 19:02:57,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:02:57,335 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:57,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 255 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 808 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2022-03-03 19:02:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-03-03 19:02:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1335. [2022-03-03 19:02:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.260119940029985) internal successors, (4349), 1334 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4349 transitions. [2022-03-03 19:02:57,351 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4349 transitions. Word has length 24 [2022-03-03 19:02:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:57,351 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 4349 transitions. [2022-03-03 19:02:57,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4349 transitions. [2022-03-03 19:02:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:57,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:57,353 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:57,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:57,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:57,554 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2022981807, now seen corresponding path program 118 times [2022-03-03 19:02:57,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:57,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13091703] [2022-03-03 19:02:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:57,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:57,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:57,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13091703] [2022-03-03 19:02:57,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13091703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:57,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758420209] [2022-03-03 19:02:57,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:02:57,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:57,723 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) [2022-03-03 19:02:57,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-03 19:02:57,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:02:57,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:57,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:57,866 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 47 treesize of output 39 [2022-03-03 19:02:57,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:57,910 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 47 treesize of output 41 [2022-03-03 19:02:57,921 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 [2022-03-03 19:02:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:58,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:58,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:58,352 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 77 treesize of output 75 [2022-03-03 19:02:58,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:58,573 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-03 19:02:58,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:58,579 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 102 treesize of output 86 [2022-03-03 19:02:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:58,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758420209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:02:58,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:02:58,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:02:58,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641873543] [2022-03-03 19:02:58,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:02:58,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:02:58,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:02:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:02:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:02:58,640 INFO L87 Difference]: Start difference. First operand 1335 states and 4349 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:02:58,875 INFO L93 Difference]: Finished difference Result 1412 states and 4568 transitions. [2022-03-03 19:02:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:02:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:02:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:02:58,877 INFO L225 Difference]: With dead ends: 1412 [2022-03-03 19:02:58,877 INFO L226 Difference]: Without dead ends: 1377 [2022-03-03 19:02:58,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:02:58,877 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:02:58,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 216 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 310 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2022-03-03 19:02:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-03-03 19:02:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1331. [2022-03-03 19:02:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.262406015037594) internal successors, (4339), 1330 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4339 transitions. [2022-03-03 19:02:58,892 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4339 transitions. Word has length 24 [2022-03-03 19:02:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:02:58,892 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 4339 transitions. [2022-03-03 19:02:58,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:02:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4339 transitions. [2022-03-03 19:02:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:02:58,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:02:58,894 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:02:58,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-03 19:02:59,094 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,SelfDestructingSolverStorable133 [2022-03-03 19:02:59,095 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:02:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:02:59,095 INFO L85 PathProgramCache]: Analyzing trace with hash 617078035, now seen corresponding path program 119 times [2022-03-03 19:02:59,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:02:59,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649221788] [2022-03-03 19:02:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:02:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:02:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:02:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:59,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:02:59,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649221788] [2022-03-03 19:02:59,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649221788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:02:59,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82458191] [2022-03-03 19:02:59,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:02:59,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:02:59,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:02:59,253 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) [2022-03-03 19:02:59,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-03 19:02:59,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:02:59,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:02:59,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:02:59,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:02:59,384 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 [2022-03-03 19:02:59,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:59,414 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 44 [2022-03-03 19:02:59,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:02:59,416 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 55 treesize of output 35 [2022-03-03 19:02:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:02:59,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:02:59,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:02:59,882 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 76 [2022-03-03 19:03:00,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:00,174 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 126 treesize of output 110 [2022-03-03 19:03:00,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:00,180 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-03 19:03:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:00,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82458191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:00,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:00,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:00,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064839478] [2022-03-03 19:03:00,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:00,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:00,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:00,244 INFO L87 Difference]: Start difference. First operand 1331 states and 4339 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:00,738 INFO L93 Difference]: Finished difference Result 1519 states and 4836 transitions. [2022-03-03 19:03:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:03:00,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:00,740 INFO L225 Difference]: With dead ends: 1519 [2022-03-03 19:03:00,740 INFO L226 Difference]: Without dead ends: 1411 [2022-03-03 19:03:00,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:03:00,740 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 76 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:00,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 238 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 584 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-03-03 19:03:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-03-03 19:03:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1334. [2022-03-03 19:03:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.2625656414103528) internal successors, (4349), 1333 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4349 transitions. [2022-03-03 19:03:00,755 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4349 transitions. Word has length 24 [2022-03-03 19:03:00,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:00,755 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 4349 transitions. [2022-03-03 19:03:00,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4349 transitions. [2022-03-03 19:03:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:00,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:00,757 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:00,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:00,957 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,SelfDestructingSolverStorable134 [2022-03-03 19:03:00,957 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:00,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2003695823, now seen corresponding path program 120 times [2022-03-03 19:03:00,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:00,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951828023] [2022-03-03 19:03:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:00,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:01,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:01,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951828023] [2022-03-03 19:03:01,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951828023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:01,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078480846] [2022-03-03 19:03:01,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:03:01,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:01,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:01,121 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) [2022-03-03 19:03:01,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-03 19:03:01,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:03:01,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:01,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:01,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:01,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:01,190 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:03:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:01,361 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 26 treesize of output 22 [2022-03-03 19:03:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:01,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:01,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:01,821 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-03-03 19:03:01,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:01,886 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-03-03 19:03:01,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:01,891 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 41 treesize of output 38 [2022-03-03 19:03:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:01,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078480846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:01,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:01,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:01,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443103481] [2022-03-03 19:03:01,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:01,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:01,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:01,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:01,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:01,940 INFO L87 Difference]: Start difference. First operand 1334 states and 4349 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:02,371 INFO L93 Difference]: Finished difference Result 1640 states and 5210 transitions. [2022-03-03 19:03:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:03:02,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:02,374 INFO L225 Difference]: With dead ends: 1640 [2022-03-03 19:03:02,374 INFO L226 Difference]: Without dead ends: 1591 [2022-03-03 19:03:02,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:03:02,374 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:02,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 384 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 693 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-03-03 19:03:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2022-03-03 19:03:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1361. [2022-03-03 19:03:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2411764705882353) internal successors, (4408), 1360 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4408 transitions. [2022-03-03 19:03:02,390 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4408 transitions. Word has length 24 [2022-03-03 19:03:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:02,390 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 4408 transitions. [2022-03-03 19:03:02,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4408 transitions. [2022-03-03 19:03:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:02,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:02,392 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:02,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:02,592 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,SelfDestructingSolverStorable135 [2022-03-03 19:03:02,592 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash 167795443, now seen corresponding path program 121 times [2022-03-03 19:03:02,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:02,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331927663] [2022-03-03 19:03:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:02,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:02,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331927663] [2022-03-03 19:03:02,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331927663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:02,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354247073] [2022-03-03 19:03:02,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:03:02,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:02,781 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) [2022-03-03 19:03:02,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-03 19:03:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:02,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:03:02,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:02,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:02,896 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 41 treesize of output 35 [2022-03-03 19:03:03,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:03,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22 [2022-03-03 19:03:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:03,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:03,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:03,546 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-03-03 19:03:03,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:03,640 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 86 treesize of output 78 [2022-03-03 19:03:03,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:03,645 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-03-03 19:03:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:03,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354247073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:03,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:03,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:03,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992892874] [2022-03-03 19:03:03,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:03,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:03,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:03,720 INFO L87 Difference]: Start difference. First operand 1361 states and 4408 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:04,248 INFO L93 Difference]: Finished difference Result 1814 states and 5649 transitions. [2022-03-03 19:03:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:03:04,248 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:04,251 INFO L225 Difference]: With dead ends: 1814 [2022-03-03 19:03:04,251 INFO L226 Difference]: Without dead ends: 1733 [2022-03-03 19:03:04,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:03:04,251 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 144 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:04,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 310 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 598 Invalid, 0 Unknown, 380 Unchecked, 0.2s Time] [2022-03-03 19:03:04,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-03-03 19:03:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1340. [2022-03-03 19:03:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 3.2613890963405527) internal successors, (4367), 1339 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 4367 transitions. [2022-03-03 19:03:04,274 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 4367 transitions. Word has length 24 [2022-03-03 19:03:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:04,274 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 4367 transitions. [2022-03-03 19:03:04,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 4367 transitions. [2022-03-03 19:03:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:04,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:04,276 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:04,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-03 19:03:04,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-03 19:03:04,476 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -98564395, now seen corresponding path program 122 times [2022-03-03 19:03:04,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:04,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606468532] [2022-03-03 19:03:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:04,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:04,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606468532] [2022-03-03 19:03:04,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606468532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:04,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551175339] [2022-03-03 19:03:04,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:03:04,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:04,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:04,652 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) [2022-03-03 19:03:04,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-03 19:03:04,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:03:04,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:04,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:04,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:04,716 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 35 [2022-03-03 19:03:04,838 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 22 [2022-03-03 19:03:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:04,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:05,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:05,343 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 55 treesize of output 53 [2022-03-03 19:03:05,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:05,427 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-03-03 19:03:05,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:05,432 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 46 treesize of output 43 [2022-03-03 19:03:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:05,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551175339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:05,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:05,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:03:05,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821665365] [2022-03-03 19:03:05,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:05,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:03:05,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:05,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:03:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:03:05,508 INFO L87 Difference]: Start difference. First operand 1340 states and 4367 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:07,396 INFO L93 Difference]: Finished difference Result 1998 states and 6107 transitions. [2022-03-03 19:03:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:03:07,396 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:03:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:07,400 INFO L225 Difference]: With dead ends: 1998 [2022-03-03 19:03:07,400 INFO L226 Difference]: Without dead ends: 1882 [2022-03-03 19:03:07,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:03:07,400 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 150 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:07,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 463 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:03:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2022-03-03 19:03:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1427. [2022-03-03 19:03:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.2398316970546985) internal successors, (4620), 1426 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4620 transitions. [2022-03-03 19:03:07,427 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4620 transitions. Word has length 24 [2022-03-03 19:03:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:07,427 INFO L470 AbstractCegarLoop]: Abstraction has 1427 states and 4620 transitions. [2022-03-03 19:03:07,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4620 transitions. [2022-03-03 19:03:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:07,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:07,429 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:07,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:07,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:07,630 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:07,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1065368779, now seen corresponding path program 123 times [2022-03-03 19:03:07,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:07,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081772635] [2022-03-03 19:03:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:07,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:07,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:07,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081772635] [2022-03-03 19:03:07,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081772635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:07,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291070708] [2022-03-03 19:03:07,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:03:07,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:07,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:07,821 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) [2022-03-03 19:03:07,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-03 19:03:07,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:03:07,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:07,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:03:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:07,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:07,917 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 41 treesize of output 35 [2022-03-03 19:03:08,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:08,081 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 47 treesize of output 41 [2022-03-03 19:03:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:08,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:08,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:08,761 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 53 treesize of output 51 [2022-03-03 19:03:08,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:08,855 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 86 treesize of output 78 [2022-03-03 19:03:08,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:08,861 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 70 treesize of output 62 [2022-03-03 19:03:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:08,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291070708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:08,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:08,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:03:08,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843759050] [2022-03-03 19:03:08,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:08,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:03:08,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:03:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:03:08,924 INFO L87 Difference]: Start difference. First operand 1427 states and 4620 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:10,067 INFO L93 Difference]: Finished difference Result 2128 states and 6328 transitions. [2022-03-03 19:03:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:03:10,067 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:03:10,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:10,070 INFO L225 Difference]: With dead ends: 2128 [2022-03-03 19:03:10,070 INFO L226 Difference]: Without dead ends: 1986 [2022-03-03 19:03:10,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:03:10,071 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 180 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:10,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 427 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 963 Invalid, 0 Unknown, 225 Unchecked, 0.4s Time] [2022-03-03 19:03:10,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2022-03-03 19:03:10,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1425. [2022-03-03 19:03:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.240870786516854) internal successors, (4615), 1424 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4615 transitions. [2022-03-03 19:03:10,090 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4615 transitions. Word has length 24 [2022-03-03 19:03:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:10,090 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 4615 transitions. [2022-03-03 19:03:10,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4615 transitions. [2022-03-03 19:03:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:10,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:10,092 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:10,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-03 19:03:10,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:10,292 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1316129901, now seen corresponding path program 124 times [2022-03-03 19:03:10,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:10,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341310580] [2022-03-03 19:03:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:10,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:10,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:10,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341310580] [2022-03-03 19:03:10,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341310580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:10,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781300491] [2022-03-03 19:03:10,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:03:10,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:10,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:10,511 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) [2022-03-03 19:03:10,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-03 19:03:10,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:03:10,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:10,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:03:10,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:10,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:10,597 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:03:10,783 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 [2022-03-03 19:03:10,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:10,785 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-03 19:03:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:10,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:11,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:11,234 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 53 treesize of output 51 [2022-03-03 19:03:11,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:11,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 78 [2022-03-03 19:03:11,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:11,330 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-03-03 19:03:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:11,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781300491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:11,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:11,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:11,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74413861] [2022-03-03 19:03:11,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:11,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:11,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:11,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:11,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:11,407 INFO L87 Difference]: Start difference. First operand 1425 states and 4615 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:11,916 INFO L93 Difference]: Finished difference Result 2148 states and 6556 transitions. [2022-03-03 19:03:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:03:11,916 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:11,920 INFO L225 Difference]: With dead ends: 2148 [2022-03-03 19:03:11,920 INFO L226 Difference]: Without dead ends: 2017 [2022-03-03 19:03:11,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:03:11,920 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:11,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 361 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 694 Invalid, 0 Unknown, 112 Unchecked, 0.3s Time] [2022-03-03 19:03:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-03-03 19:03:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1409. [2022-03-03 19:03:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.2514204545454546) internal successors, (4578), 1408 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4578 transitions. [2022-03-03 19:03:11,940 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4578 transitions. Word has length 24 [2022-03-03 19:03:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:11,940 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 4578 transitions. [2022-03-03 19:03:11,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4578 transitions. [2022-03-03 19:03:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:11,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:11,941 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:11,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:12,142 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,SelfDestructingSolverStorable139 [2022-03-03 19:03:12,142 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:12,142 INFO L85 PathProgramCache]: Analyzing trace with hash 61317007, now seen corresponding path program 125 times [2022-03-03 19:03:12,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:12,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526742278] [2022-03-03 19:03:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:12,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:12,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:12,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526742278] [2022-03-03 19:03:12,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526742278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:12,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391119086] [2022-03-03 19:03:12,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:03:12,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:12,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:12,324 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) [2022-03-03 19:03:12,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-03 19:03:12,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:03:12,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:12,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:12,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:12,394 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 41 treesize of output 35 [2022-03-03 19:03:12,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:12,555 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 21 treesize of output 17 [2022-03-03 19:03:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:12,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:13,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:13,070 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-03 19:03:13,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:13,136 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 54 treesize of output 51 [2022-03-03 19:03:13,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:13,140 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 42 treesize of output 39 [2022-03-03 19:03:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:13,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391119086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:13,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:13,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:13,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784810913] [2022-03-03 19:03:13,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:13,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:13,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:13,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:13,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:13,175 INFO L87 Difference]: Start difference. First operand 1409 states and 4578 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:13,555 INFO L93 Difference]: Finished difference Result 1632 states and 5215 transitions. [2022-03-03 19:03:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:03:13,556 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:13,558 INFO L225 Difference]: With dead ends: 1632 [2022-03-03 19:03:13,558 INFO L226 Difference]: Without dead ends: 1585 [2022-03-03 19:03:13,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:03:13,559 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:13,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 262 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 536 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-03-03 19:03:13,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-03-03 19:03:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1413. [2022-03-03 19:03:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.2492917847025495) internal successors, (4588), 1412 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4588 transitions. [2022-03-03 19:03:13,575 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4588 transitions. Word has length 24 [2022-03-03 19:03:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:13,575 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 4588 transitions. [2022-03-03 19:03:13,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4588 transitions. [2022-03-03 19:03:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:13,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:13,577 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:13,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-03 19:03:13,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:13,778 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2140610835, now seen corresponding path program 126 times [2022-03-03 19:03:13,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:13,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909065815] [2022-03-03 19:03:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:13,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:13,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909065815] [2022-03-03 19:03:13,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909065815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:13,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800978527] [2022-03-03 19:03:13,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:03:13,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:13,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:13,898 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) [2022-03-03 19:03:13,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-03 19:03:13,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:03:13,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:13,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:03:13,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:13,980 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 35 [2022-03-03 19:03:14,152 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 22 [2022-03-03 19:03:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:14,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:14,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:14,791 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-03-03 19:03:14,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:14,884 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 88 treesize of output 80 [2022-03-03 19:03:14,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:14,889 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 72 treesize of output 64 [2022-03-03 19:03:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:14,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800978527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:14,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:14,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:14,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704470035] [2022-03-03 19:03:14,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:14,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:14,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:14,948 INFO L87 Difference]: Start difference. First operand 1413 states and 4588 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:17,770 INFO L93 Difference]: Finished difference Result 2917 states and 8533 transitions. [2022-03-03 19:03:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:03:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:17,774 INFO L225 Difference]: With dead ends: 2917 [2022-03-03 19:03:17,774 INFO L226 Difference]: Without dead ends: 2654 [2022-03-03 19:03:17,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=446, Invalid=1906, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:03:17,775 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 271 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:17,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 429 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:03:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2022-03-03 19:03:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 1427. [2022-03-03 19:03:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.267180925666199) internal successors, (4659), 1426 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4659 transitions. [2022-03-03 19:03:17,798 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4659 transitions. Word has length 24 [2022-03-03 19:03:17,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:17,798 INFO L470 AbstractCegarLoop]: Abstraction has 1427 states and 4659 transitions. [2022-03-03 19:03:17,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4659 transitions. [2022-03-03 19:03:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:17,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:17,800 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:17,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-03 19:03:18,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:18,001 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1577784015, now seen corresponding path program 127 times [2022-03-03 19:03:18,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:18,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735679852] [2022-03-03 19:03:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:18,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:18,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:18,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735679852] [2022-03-03 19:03:18,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735679852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:18,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736637269] [2022-03-03 19:03:18,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:03:18,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:18,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:18,181 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) [2022-03-03 19:03:18,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-03 19:03:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:18,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:18,256 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 35 [2022-03-03 19:03:18,388 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 41 [2022-03-03 19:03:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:18,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:19,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:19,052 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 87 treesize of output 81 [2022-03-03 19:03:19,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:19,209 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 127 treesize of output 111 [2022-03-03 19:03:19,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:19,214 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-03-03 19:03:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:19,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736637269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:19,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:19,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:19,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324927507] [2022-03-03 19:03:19,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:19,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:19,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:19,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:19,268 INFO L87 Difference]: Start difference. First operand 1427 states and 4659 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:20,273 INFO L93 Difference]: Finished difference Result 1981 states and 6276 transitions. [2022-03-03 19:03:20,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:03:20,274 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:20,277 INFO L225 Difference]: With dead ends: 1981 [2022-03-03 19:03:20,277 INFO L226 Difference]: Without dead ends: 1880 [2022-03-03 19:03:20,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:03:20,277 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 147 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:20,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 362 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:03:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2022-03-03 19:03:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1427. [2022-03-03 19:03:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.267180925666199) internal successors, (4659), 1426 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4659 transitions. [2022-03-03 19:03:20,304 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4659 transitions. Word has length 24 [2022-03-03 19:03:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:20,304 INFO L470 AbstractCegarLoop]: Abstraction has 1427 states and 4659 transitions. [2022-03-03 19:03:20,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4659 transitions. [2022-03-03 19:03:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:20,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:20,306 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:20,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-03 19:03:20,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:20,506 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:20,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1952639283, now seen corresponding path program 128 times [2022-03-03 19:03:20,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:20,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756635649] [2022-03-03 19:03:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:20,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:20,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:20,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756635649] [2022-03-03 19:03:20,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756635649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:20,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680755512] [2022-03-03 19:03:20,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:03:20,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:20,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:20,689 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) [2022-03-03 19:03:20,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-03 19:03:20,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:03:20,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:20,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:20,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:20,784 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 35 [2022-03-03 19:03:21,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:21,005 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-03 19:03:21,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:21,007 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 12 treesize of output 3 [2022-03-03 19:03:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:21,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:21,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:21,508 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 76 treesize of output 72 [2022-03-03 19:03:21,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:21,659 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 58 treesize of output 55 [2022-03-03 19:03:21,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:21,664 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 46 treesize of output 43 [2022-03-03 19:03:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:21,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680755512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:21,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:21,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:03:21,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260610069] [2022-03-03 19:03:21,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:21,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:03:21,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:03:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:03:21,727 INFO L87 Difference]: Start difference. First operand 1427 states and 4659 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:22,195 INFO L93 Difference]: Finished difference Result 1564 states and 5036 transitions. [2022-03-03 19:03:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:03:22,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:03:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:22,198 INFO L225 Difference]: With dead ends: 1564 [2022-03-03 19:03:22,198 INFO L226 Difference]: Without dead ends: 1505 [2022-03-03 19:03:22,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:03:22,199 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:22,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 332 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 724 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-03-03 19:03:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2022-03-03 19:03:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1428. [2022-03-03 19:03:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 3.2676944639103014) internal successors, (4663), 1427 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 4663 transitions. [2022-03-03 19:03:22,215 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 4663 transitions. Word has length 24 [2022-03-03 19:03:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:22,215 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 4663 transitions. [2022-03-03 19:03:22,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 4663 transitions. [2022-03-03 19:03:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:22,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:22,216 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:22,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:22,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:22,417 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1178394839, now seen corresponding path program 129 times [2022-03-03 19:03:22,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:22,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362562037] [2022-03-03 19:03:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:22,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:22,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362562037] [2022-03-03 19:03:22,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362562037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:22,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626355800] [2022-03-03 19:03:22,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:03:22,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:22,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:22,590 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) [2022-03-03 19:03:22,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-03 19:03:22,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:03:22,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:22,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:03:22,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:22,702 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 35 [2022-03-03 19:03:22,785 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 41 [2022-03-03 19:03:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:22,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:23,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:23,445 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-03 19:03:23,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:23,630 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-03-03 19:03:23,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:23,635 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 70 treesize of output 62 [2022-03-03 19:03:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:23,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626355800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:23,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:23,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:23,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298740192] [2022-03-03 19:03:23,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:23,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:23,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:23,695 INFO L87 Difference]: Start difference. First operand 1428 states and 4663 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:24,889 INFO L93 Difference]: Finished difference Result 2076 states and 6393 transitions. [2022-03-03 19:03:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:03:24,890 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:24,893 INFO L225 Difference]: With dead ends: 2076 [2022-03-03 19:03:24,893 INFO L226 Difference]: Without dead ends: 1938 [2022-03-03 19:03:24,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:03:24,893 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 121 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:24,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 526 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:03:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2022-03-03 19:03:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1433. [2022-03-03 19:03:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.2709497206703912) internal successors, (4684), 1432 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4684 transitions. [2022-03-03 19:03:24,912 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4684 transitions. Word has length 24 [2022-03-03 19:03:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:24,912 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 4684 transitions. [2022-03-03 19:03:24,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4684 transitions. [2022-03-03 19:03:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:24,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:24,914 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:24,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:25,114 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,SelfDestructingSolverStorable144 [2022-03-03 19:03:25,114 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:25,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:25,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2033777169, now seen corresponding path program 130 times [2022-03-03 19:03:25,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:25,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347992227] [2022-03-03 19:03:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:25,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:25,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:25,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347992227] [2022-03-03 19:03:25,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347992227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:25,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623539598] [2022-03-03 19:03:25,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:03:25,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:25,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:25,306 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) [2022-03-03 19:03:25,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-03 19:03:25,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:03:25,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:25,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:03:25,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:25,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:25,440 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 41 treesize of output 35 [2022-03-03 19:03:25,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:25,823 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 29 treesize of output 23 [2022-03-03 19:03:25,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:25,825 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 25 treesize of output 12 [2022-03-03 19:03:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:25,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:26,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:26,333 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 78 treesize of output 74 [2022-03-03 19:03:26,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:26,524 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 86 treesize of output 78 [2022-03-03 19:03:26,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:26,530 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 70 treesize of output 62 [2022-03-03 19:03:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:26,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623539598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:26,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:26,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:26,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825765605] [2022-03-03 19:03:26,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:26,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:26,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:26,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:26,588 INFO L87 Difference]: Start difference. First operand 1433 states and 4684 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:26,925 INFO L93 Difference]: Finished difference Result 1612 states and 5149 transitions. [2022-03-03 19:03:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:03:26,925 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:26,928 INFO L225 Difference]: With dead ends: 1612 [2022-03-03 19:03:26,928 INFO L226 Difference]: Without dead ends: 1514 [2022-03-03 19:03:26,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:03:26,928 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:26,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 199 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 560 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2022-03-03 19:03:26,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-03-03 19:03:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1434. [2022-03-03 19:03:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 3.27076064200977) internal successors, (4687), 1433 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 4687 transitions. [2022-03-03 19:03:26,944 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 4687 transitions. Word has length 24 [2022-03-03 19:03:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:26,944 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 4687 transitions. [2022-03-03 19:03:26,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 4687 transitions. [2022-03-03 19:03:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:26,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:26,945 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:26,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-03 19:03:27,146 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,SelfDestructingSolverStorable145 [2022-03-03 19:03:27,146 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2041958899, now seen corresponding path program 131 times [2022-03-03 19:03:27,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:27,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042305690] [2022-03-03 19:03:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:27,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:27,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042305690] [2022-03-03 19:03:27,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042305690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:27,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816553261] [2022-03-03 19:03:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:03:27,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:27,351 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) [2022-03-03 19:03:27,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-03 19:03:27,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:03:27,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:27,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:27,476 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 35 [2022-03-03 19:03:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:27,671 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-03 19:03:27,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:27,673 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:03:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:27,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:28,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:28,410 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-03 19:03:28,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:28,605 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 123 treesize of output 107 [2022-03-03 19:03:28,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:28,611 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 99 treesize of output 83 [2022-03-03 19:03:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:28,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816553261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:28,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:28,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:03:28,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040057971] [2022-03-03 19:03:28,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:28,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:03:28,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:03:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:03:28,662 INFO L87 Difference]: Start difference. First operand 1434 states and 4687 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-03-03 19:03:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:28,970 INFO L93 Difference]: Finished difference Result 1553 states and 5030 transitions. [2022-03-03 19:03:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:03:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 24 [2022-03-03 19:03:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:28,973 INFO L225 Difference]: With dead ends: 1553 [2022-03-03 19:03:28,973 INFO L226 Difference]: Without dead ends: 1522 [2022-03-03 19:03:28,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:03:28,973 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:28,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 231 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 666 Invalid, 0 Unknown, 10 Unchecked, 0.3s Time] [2022-03-03 19:03:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-03-03 19:03:28,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1433. [2022-03-03 19:03:28,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.2709497206703912) internal successors, (4684), 1432 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4684 transitions. [2022-03-03 19:03:28,997 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4684 transitions. Word has length 24 [2022-03-03 19:03:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:28,997 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 4684 transitions. [2022-03-03 19:03:28,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-03-03 19:03:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4684 transitions. [2022-03-03 19:03:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:28,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:28,999 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:29,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-03 19:03:29,199 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,SelfDestructingSolverStorable146 [2022-03-03 19:03:29,200 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash -894721755, now seen corresponding path program 132 times [2022-03-03 19:03:29,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:29,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060808576] [2022-03-03 19:03:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:29,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:29,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:29,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060808576] [2022-03-03 19:03:29,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060808576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:29,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044549852] [2022-03-03 19:03:29,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:03:29,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:29,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:29,358 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) [2022-03-03 19:03:29,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-03 19:03:29,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:03:29,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:29,430 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 48 treesize of output 40 [2022-03-03 19:03:29,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-03-03 19:03:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:29,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:30,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:30,291 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 70 treesize of output 68 [2022-03-03 19:03:30,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:30,423 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 51 treesize of output 50 [2022-03-03 19:03:30,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:30,428 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 41 treesize of output 40 [2022-03-03 19:03:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:30,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044549852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:30,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:30,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:03:30,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722819101] [2022-03-03 19:03:30,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:30,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:03:30,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:30,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:03:30,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:03:30,485 INFO L87 Difference]: Start difference. First operand 1433 states and 4684 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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) [2022-03-03 19:03:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:30,935 INFO L93 Difference]: Finished difference Result 1795 states and 5633 transitions. [2022-03-03 19:03:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:03:30,935 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 24 [2022-03-03 19:03:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:30,938 INFO L225 Difference]: With dead ends: 1795 [2022-03-03 19:03:30,939 INFO L226 Difference]: Without dead ends: 1702 [2022-03-03 19:03:30,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:03:30,939 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:30,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 205 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:03:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2022-03-03 19:03:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1436. [2022-03-03 19:03:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.271080139372822) internal successors, (4694), 1435 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4694 transitions. [2022-03-03 19:03:30,956 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4694 transitions. Word has length 24 [2022-03-03 19:03:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:30,956 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 4694 transitions. [2022-03-03 19:03:30,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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) [2022-03-03 19:03:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4694 transitions. [2022-03-03 19:03:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:30,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:30,958 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:30,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-03 19:03:31,158 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,SelfDestructingSolverStorable147 [2022-03-03 19:03:31,158 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:31,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1467646519, now seen corresponding path program 133 times [2022-03-03 19:03:31,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:31,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909008142] [2022-03-03 19:03:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:31,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:31,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909008142] [2022-03-03 19:03:31,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909008142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:31,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880596088] [2022-03-03 19:03:31,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:03:31,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:31,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:31,418 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) [2022-03-03 19:03:31,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-03 19:03:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:31,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:03:31,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:31,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:31,551 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 41 treesize of output 35 [2022-03-03 19:03:31,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:31,668 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 47 treesize of output 41 [2022-03-03 19:03:31,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:31,671 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:03:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:31,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:32,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:32,396 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 80 treesize of output 76 [2022-03-03 19:03:32,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:32,566 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 83 treesize of output 75 [2022-03-03 19:03:32,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:32,571 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2022-03-03 19:03:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:32,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880596088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:32,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:32,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:32,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967893336] [2022-03-03 19:03:32,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:32,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:32,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:32,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:32,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:32,620 INFO L87 Difference]: Start difference. First operand 1436 states and 4694 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:35,620 INFO L93 Difference]: Finished difference Result 2712 states and 7901 transitions. [2022-03-03 19:03:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:03:35,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:35,625 INFO L225 Difference]: With dead ends: 2712 [2022-03-03 19:03:35,625 INFO L226 Difference]: Without dead ends: 2474 [2022-03-03 19:03:35,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:03:35,625 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 329 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:35,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 494 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1049 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-03-03 19:03:35,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-03-03 19:03:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1434. [2022-03-03 19:03:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 3.2721563154221913) internal successors, (4689), 1433 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 4689 transitions. [2022-03-03 19:03:35,649 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 4689 transitions. Word has length 24 [2022-03-03 19:03:35,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:35,649 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 4689 transitions. [2022-03-03 19:03:35,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:35,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 4689 transitions. [2022-03-03 19:03:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:35,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:35,651 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:35,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-03 19:03:35,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:35,851 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash -165436977, now seen corresponding path program 134 times [2022-03-03 19:03:35,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:35,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294179470] [2022-03-03 19:03:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:35,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:36,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:36,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294179470] [2022-03-03 19:03:36,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294179470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:36,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760203199] [2022-03-03 19:03:36,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:03:36,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:36,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:36,105 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) [2022-03-03 19:03:36,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-03 19:03:36,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:03:36,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:36,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:36,215 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 23 treesize of output 19 [2022-03-03 19:03:36,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:36,272 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 42 treesize of output 36 [2022-03-03 19:03:36,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:36,275 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 37 treesize of output 21 [2022-03-03 19:03:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:36,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:37,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:37,062 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 131 treesize of output 121 [2022-03-03 19:03:37,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:37,295 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 51 treesize of output 50 [2022-03-03 19:03:37,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:37,299 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 41 treesize of output 40 [2022-03-03 19:03:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:37,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760203199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:37,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:37,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:37,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417979860] [2022-03-03 19:03:37,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:37,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:37,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:37,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:37,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:37,367 INFO L87 Difference]: Start difference. First operand 1434 states and 4689 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:38,493 INFO L93 Difference]: Finished difference Result 1689 states and 5336 transitions. [2022-03-03 19:03:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:03:38,493 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:38,496 INFO L225 Difference]: With dead ends: 1689 [2022-03-03 19:03:38,496 INFO L226 Difference]: Without dead ends: 1596 [2022-03-03 19:03:38,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:03:38,496 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 189 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:38,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 185 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 566 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-03-03 19:03:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2022-03-03 19:03:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1437. [2022-03-03 19:03:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 3.272284122562674) internal successors, (4699), 1436 states have internal predecessors, (4699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 4699 transitions. [2022-03-03 19:03:38,513 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 4699 transitions. Word has length 24 [2022-03-03 19:03:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:38,513 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 4699 transitions. [2022-03-03 19:03:38,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 4699 transitions. [2022-03-03 19:03:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:38,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:38,515 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:38,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:38,715 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,SelfDestructingSolverStorable149 [2022-03-03 19:03:38,715 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:38,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:38,715 INFO L85 PathProgramCache]: Analyzing trace with hash -738361741, now seen corresponding path program 135 times [2022-03-03 19:03:38,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:38,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393950272] [2022-03-03 19:03:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:38,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:38,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:38,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393950272] [2022-03-03 19:03:38,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393950272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:38,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787282052] [2022-03-03 19:03:38,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:03:38,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:38,998 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) [2022-03-03 19:03:38,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-03 19:03:39,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:03:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:39,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:39,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:39,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:39,130 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:03:39,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:39,181 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 42 treesize of output 36 [2022-03-03 19:03:39,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:39,184 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:03:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:39,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:39,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:39,798 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-03 19:03:40,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:40,121 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 129 treesize of output 113 [2022-03-03 19:03:40,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:40,126 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 105 treesize of output 89 [2022-03-03 19:03:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:40,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787282052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:40,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:40,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:40,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618132844] [2022-03-03 19:03:40,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:40,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:40,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:40,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:40,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:40,213 INFO L87 Difference]: Start difference. First operand 1437 states and 4699 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:40,568 INFO L93 Difference]: Finished difference Result 1550 states and 5018 transitions. [2022-03-03 19:03:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:03:40,569 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:40,571 INFO L225 Difference]: With dead ends: 1550 [2022-03-03 19:03:40,571 INFO L226 Difference]: Without dead ends: 1519 [2022-03-03 19:03:40,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:03:40,572 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:40,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 236 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 674 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-03-03 19:03:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-03-03 19:03:40,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1434. [2022-03-03 19:03:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 3.2721563154221913) internal successors, (4689), 1433 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 4689 transitions. [2022-03-03 19:03:40,588 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 4689 transitions. Word has length 24 [2022-03-03 19:03:40,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:40,588 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 4689 transitions. [2022-03-03 19:03:40,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 4689 transitions. [2022-03-03 19:03:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:40,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:40,589 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:40,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-03 19:03:40,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:40,790 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash 998137971, now seen corresponding path program 136 times [2022-03-03 19:03:40,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:40,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775789153] [2022-03-03 19:03:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:40,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:40,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:40,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775789153] [2022-03-03 19:03:40,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775789153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:40,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131330868] [2022-03-03 19:03:40,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:03:40,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:40,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:40,997 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) [2022-03-03 19:03:40,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-03 19:03:41,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:03:41,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:41,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:41,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:41,130 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:03:41,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:41,224 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 41 treesize of output 35 [2022-03-03 19:03:41,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:41,227 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 37 treesize of output 21 [2022-03-03 19:03:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:41,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:41,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:41,806 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 103 treesize of output 97 [2022-03-03 19:03:42,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:42,106 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 129 treesize of output 113 [2022-03-03 19:03:42,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:42,111 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 105 treesize of output 89 [2022-03-03 19:03:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:42,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131330868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:42,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:42,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:42,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469121015] [2022-03-03 19:03:42,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:42,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:42,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:42,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:42,176 INFO L87 Difference]: Start difference. First operand 1434 states and 4689 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:42,883 INFO L93 Difference]: Finished difference Result 1614 states and 5128 transitions. [2022-03-03 19:03:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:03:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:42,886 INFO L225 Difference]: With dead ends: 1614 [2022-03-03 19:03:42,886 INFO L226 Difference]: Without dead ends: 1540 [2022-03-03 19:03:42,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:03:42,886 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 104 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:42,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 224 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 592 Invalid, 0 Unknown, 112 Unchecked, 0.3s Time] [2022-03-03 19:03:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2022-03-03 19:03:42,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1434. [2022-03-03 19:03:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 3.2721563154221913) internal successors, (4689), 1433 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 4689 transitions. [2022-03-03 19:03:42,902 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 4689 transitions. Word has length 24 [2022-03-03 19:03:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:42,902 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 4689 transitions. [2022-03-03 19:03:42,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 4689 transitions. [2022-03-03 19:03:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:42,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:42,904 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:42,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:43,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:43,104 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1214886259, now seen corresponding path program 137 times [2022-03-03 19:03:43,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:43,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708340182] [2022-03-03 19:03:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:43,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:03:43,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:43,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708340182] [2022-03-03 19:03:43,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708340182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:43,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043379612] [2022-03-03 19:03:43,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:03:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:43,386 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) [2022-03-03 19:03:43,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-03 19:03:43,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:03:43,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:43,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:43,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:43,496 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 [2022-03-03 19:03:43,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:43,575 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 51 treesize of output 43 [2022-03-03 19:03:43,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:43,578 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 53 treesize of output 33 [2022-03-03 19:03:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:03:43,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:44,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:44,140 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 129 treesize of output 119 [2022-03-03 19:03:44,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:44,360 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2022-03-03 19:03:44,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:44,364 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 41 treesize of output 40 [2022-03-03 19:03:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:03:44,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043379612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:44,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:44,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:44,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642556116] [2022-03-03 19:03:44,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:44,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:44,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:44,430 INFO L87 Difference]: Start difference. First operand 1434 states and 4689 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:44,849 INFO L93 Difference]: Finished difference Result 1539 states and 4995 transitions. [2022-03-03 19:03:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:03:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:44,852 INFO L225 Difference]: With dead ends: 1539 [2022-03-03 19:03:44,852 INFO L226 Difference]: Without dead ends: 1520 [2022-03-03 19:03:44,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:03:44,852 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:44,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 275 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 616 Invalid, 0 Unknown, 202 Unchecked, 0.3s Time] [2022-03-03 19:03:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-03-03 19:03:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1440. [2022-03-03 19:03:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.273801250868659) internal successors, (4711), 1439 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4711 transitions. [2022-03-03 19:03:44,868 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4711 transitions. Word has length 24 [2022-03-03 19:03:44,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:44,868 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 4711 transitions. [2022-03-03 19:03:44,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4711 transitions. [2022-03-03 19:03:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:44,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:44,870 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:44,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-03 19:03:45,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:45,070 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:45,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:45,070 INFO L85 PathProgramCache]: Analyzing trace with hash 630291485, now seen corresponding path program 138 times [2022-03-03 19:03:45,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:45,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637122843] [2022-03-03 19:03:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:45,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:45,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637122843] [2022-03-03 19:03:45,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637122843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:45,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115373409] [2022-03-03 19:03:45,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:03:45,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:45,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:45,222 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) [2022-03-03 19:03:45,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-03 19:03:45,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:03:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:45,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:45,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:45,294 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 [2022-03-03 19:03:45,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:45,511 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 23 treesize of output 19 [2022-03-03 19:03:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:45,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:45,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:45,946 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 50 treesize of output 47 [2022-03-03 19:03:45,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:45,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:03:45,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:45,995 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:03:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:46,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115373409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:46,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:46,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:46,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576941368] [2022-03-03 19:03:46,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:46,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:46,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:46,013 INFO L87 Difference]: Start difference. First operand 1440 states and 4711 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:46,583 INFO L93 Difference]: Finished difference Result 1992 states and 6337 transitions. [2022-03-03 19:03:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:03:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:46,587 INFO L225 Difference]: With dead ends: 1992 [2022-03-03 19:03:46,587 INFO L226 Difference]: Without dead ends: 1916 [2022-03-03 19:03:46,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:03:46,587 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 141 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:46,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 415 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 756 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-03-03 19:03:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-03-03 19:03:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1504. [2022-03-03 19:03:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.2461743180306053) internal successors, (4879), 1503 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 4879 transitions. [2022-03-03 19:03:46,606 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 4879 transitions. Word has length 24 [2022-03-03 19:03:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:46,606 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 4879 transitions. [2022-03-03 19:03:46,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 4879 transitions. [2022-03-03 19:03:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:46,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:46,608 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:46,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-03 19:03:46,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:46,808 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:46,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1205608895, now seen corresponding path program 139 times [2022-03-03 19:03:46,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:46,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121968946] [2022-03-03 19:03:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:46,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:46,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:46,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121968946] [2022-03-03 19:03:46,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121968946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:46,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097510274] [2022-03-03 19:03:46,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:03:46,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:46,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:46,965 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) [2022-03-03 19:03:46,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-03 19:03:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:46,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:03:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:47,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:47,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:03:47,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:47,329 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:03:47,331 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 [2022-03-03 19:03:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:47,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:47,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:47,788 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 78 treesize of output 70 [2022-03-03 19:03:47,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:47,885 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:03:47,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:47,889 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 29 treesize of output 31 [2022-03-03 19:03:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:47,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097510274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:47,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:47,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:47,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408630780] [2022-03-03 19:03:47,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:47,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:47,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:47,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:47,912 INFO L87 Difference]: Start difference. First operand 1504 states and 4879 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:48,680 INFO L93 Difference]: Finished difference Result 2035 states and 6301 transitions. [2022-03-03 19:03:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:03:48,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:48,684 INFO L225 Difference]: With dead ends: 2035 [2022-03-03 19:03:48,684 INFO L226 Difference]: Without dead ends: 2007 [2022-03-03 19:03:48,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:03:48,684 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 228 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:48,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 288 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 732 Invalid, 0 Unknown, 347 Unchecked, 0.3s Time] [2022-03-03 19:03:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2022-03-03 19:03:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1508. [2022-03-03 19:03:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 3.257465162574652) internal successors, (4909), 1507 states have internal predecessors, (4909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 4909 transitions. [2022-03-03 19:03:48,704 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 4909 transitions. Word has length 24 [2022-03-03 19:03:48,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:48,704 INFO L470 AbstractCegarLoop]: Abstraction has 1508 states and 4909 transitions. [2022-03-03 19:03:48,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:48,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 4909 transitions. [2022-03-03 19:03:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:48,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:48,706 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:48,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:48,906 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,SelfDestructingSolverStorable154 [2022-03-03 19:03:48,907 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:48,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1545211393, now seen corresponding path program 140 times [2022-03-03 19:03:48,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:48,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881106764] [2022-03-03 19:03:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:48,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:03:49,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:49,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881106764] [2022-03-03 19:03:49,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881106764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:49,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831306438] [2022-03-03 19:03:49,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:03:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:49,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:49,059 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) [2022-03-03 19:03:49,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-03 19:03:49,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:03:49,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:49,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:49,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:49,125 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 35 [2022-03-03 19:03:49,224 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 22 [2022-03-03 19:03:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:03:49,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:49,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:49,688 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 50 treesize of output 47 [2022-03-03 19:03:49,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:49,733 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 31 treesize of output 33 [2022-03-03 19:03:49,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:49,736 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 25 treesize of output 27 [2022-03-03 19:03:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:03:49,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831306438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:49,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:49,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:49,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671971623] [2022-03-03 19:03:49,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:49,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:49,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:49,757 INFO L87 Difference]: Start difference. First operand 1508 states and 4909 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:52,085 INFO L93 Difference]: Finished difference Result 2416 states and 7351 transitions. [2022-03-03 19:03:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:03:52,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:03:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:52,089 INFO L225 Difference]: With dead ends: 2416 [2022-03-03 19:03:52,089 INFO L226 Difference]: Without dead ends: 2228 [2022-03-03 19:03:52,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=505, Invalid=2357, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:03:52,089 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 341 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:52,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 412 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:03:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2022-03-03 19:03:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1502. [2022-03-03 19:03:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.260493004663558) internal successors, (4894), 1501 states have internal predecessors, (4894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 4894 transitions. [2022-03-03 19:03:52,112 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 4894 transitions. Word has length 24 [2022-03-03 19:03:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:52,112 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 4894 transitions. [2022-03-03 19:03:52,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 4894 transitions. [2022-03-03 19:03:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:52,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:52,114 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:52,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:52,315 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,SelfDestructingSolverStorable155 [2022-03-03 19:03:52,315 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1471968733, now seen corresponding path program 141 times [2022-03-03 19:03:52,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:52,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738154724] [2022-03-03 19:03:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:52,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:52,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:52,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738154724] [2022-03-03 19:03:52,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738154724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:52,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294061492] [2022-03-03 19:03:52,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:03:52,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:52,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:52,466 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) [2022-03-03 19:03:52,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-03 19:03:52,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:03:52,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:52,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:52,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:52,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:52,582 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 41 treesize of output 35 [2022-03-03 19:03:52,863 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 [2022-03-03 19:03:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:52,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:53,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:53,454 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 120 treesize of output 104 [2022-03-03 19:03:53,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:53,540 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 31 treesize of output 33 [2022-03-03 19:03:53,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:53,543 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:03:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:53,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294061492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:53,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:53,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:03:53,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36716282] [2022-03-03 19:03:53,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:53,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:03:53,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:53,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:03:53,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:03:53,567 INFO L87 Difference]: Start difference. First operand 1502 states and 4894 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:53,997 INFO L93 Difference]: Finished difference Result 1804 states and 5758 transitions. [2022-03-03 19:03:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:03:53,997 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:03:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:54,000 INFO L225 Difference]: With dead ends: 1804 [2022-03-03 19:03:54,000 INFO L226 Difference]: Without dead ends: 1746 [2022-03-03 19:03:54,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:03:54,000 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:54,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 341 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 897 Invalid, 0 Unknown, 127 Unchecked, 0.4s Time] [2022-03-03 19:03:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-03-03 19:03:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1510. [2022-03-03 19:03:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.2577866136514246) internal successors, (4916), 1509 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 4916 transitions. [2022-03-03 19:03:54,017 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 4916 transitions. Word has length 24 [2022-03-03 19:03:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:54,017 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 4916 transitions. [2022-03-03 19:03:54,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 4916 transitions. [2022-03-03 19:03:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:54,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:54,019 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:54,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-03 19:03:54,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:54,220 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash -308035559, now seen corresponding path program 142 times [2022-03-03 19:03:54,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:54,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446775879] [2022-03-03 19:03:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:54,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:54,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:54,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446775879] [2022-03-03 19:03:54,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446775879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:54,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548620912] [2022-03-03 19:03:54,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:03:54,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:54,376 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) [2022-03-03 19:03:54,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-03 19:03:54,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:03:54,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:54,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:03:54,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:54,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:54,461 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 41 treesize of output 35 [2022-03-03 19:03:54,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:54,708 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-03-03 19:03:54,710 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 [2022-03-03 19:03:54,715 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 13 treesize of output 9 [2022-03-03 19:03:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:54,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:55,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:55,415 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-03 19:03:55,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:55,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:03:55,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:55,515 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 29 treesize of output 31 [2022-03-03 19:03:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:55,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548620912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:55,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:55,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:03:55,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147070360] [2022-03-03 19:03:55,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:55,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:03:55,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:03:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:03:55,532 INFO L87 Difference]: Start difference. First operand 1510 states and 4916 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:56,100 INFO L93 Difference]: Finished difference Result 2032 states and 6327 transitions. [2022-03-03 19:03:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:03:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:03:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:56,104 INFO L225 Difference]: With dead ends: 2032 [2022-03-03 19:03:56,104 INFO L226 Difference]: Without dead ends: 2018 [2022-03-03 19:03:56,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:03:56,104 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 101 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:56,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 410 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 561 Invalid, 0 Unknown, 266 Unchecked, 0.2s Time] [2022-03-03 19:03:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-03-03 19:03:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1528. [2022-03-03 19:03:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.2619515389652913) internal successors, (4981), 1527 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 4981 transitions. [2022-03-03 19:03:56,125 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 4981 transitions. Word has length 24 [2022-03-03 19:03:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:56,125 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 4981 transitions. [2022-03-03 19:03:56,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:03:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 4981 transitions. [2022-03-03 19:03:56,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:56,127 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:56,127 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:56,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-03 19:03:56,328 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,SelfDestructingSolverStorable157 [2022-03-03 19:03:56,328 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1411497439, now seen corresponding path program 143 times [2022-03-03 19:03:56,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:56,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693067786] [2022-03-03 19:03:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:56,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:56,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:56,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693067786] [2022-03-03 19:03:56,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693067786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:56,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774216881] [2022-03-03 19:03:56,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:03:56,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:56,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:56,505 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) [2022-03-03 19:03:56,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-03 19:03:56,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:03:56,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:56,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:56,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:56,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:56,580 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 41 treesize of output 35 [2022-03-03 19:03:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:56,805 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-03-03 19:03:56,806 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 25 treesize of output 17 [2022-03-03 19:03:56,812 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 13 treesize of output 9 [2022-03-03 19:03:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:56,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:57,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:57,441 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-03 19:03:57,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:57,541 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 31 treesize of output 33 [2022-03-03 19:03:57,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:57,544 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 25 treesize of output 27 [2022-03-03 19:03:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:57,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774216881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:57,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:57,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:03:57,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992335884] [2022-03-03 19:03:57,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:57,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:03:57,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:57,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:03:57,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:03:57,561 INFO L87 Difference]: Start difference. First operand 1528 states and 4981 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-03-03 19:03:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:03:58,089 INFO L93 Difference]: Finished difference Result 1853 states and 5884 transitions. [2022-03-03 19:03:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:03:58,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 24 [2022-03-03 19:03:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:03:58,092 INFO L225 Difference]: With dead ends: 1853 [2022-03-03 19:03:58,092 INFO L226 Difference]: Without dead ends: 1775 [2022-03-03 19:03:58,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:03:58,093 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 127 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:03:58,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 309 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 817 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-03-03 19:03:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-03-03 19:03:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1498. [2022-03-03 19:03:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.2638610554442216) internal successors, (4886), 1497 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:03:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 4886 transitions. [2022-03-03 19:03:58,111 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 4886 transitions. Word has length 24 [2022-03-03 19:03:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:03:58,111 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 4886 transitions. [2022-03-03 19:03:58,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-03-03 19:03:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 4886 transitions. [2022-03-03 19:03:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:03:58,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:03:58,113 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:03:58,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-03 19:03:58,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-03 19:03:58,313 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:03:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:03:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash -959553497, now seen corresponding path program 144 times [2022-03-03 19:03:58,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:03:58,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003029441] [2022-03-03 19:03:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:03:58,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:03:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:03:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:58,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:03:58,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003029441] [2022-03-03 19:03:58,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003029441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:03:58,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465243448] [2022-03-03 19:03:58,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:03:58,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:03:58,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:03:58,491 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) [2022-03-03 19:03:58,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-03 19:03:58,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:03:58,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:03:58,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:03:58,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:03:58,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:58,586 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:03:59,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:59,207 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 26 treesize of output 22 [2022-03-03 19:03:59,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:03:59,209 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 12 treesize of output 3 [2022-03-03 19:03:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:59,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:03:59,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:59,778 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 50 treesize of output 47 [2022-03-03 19:03:59,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:59,832 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 31 treesize of output 33 [2022-03-03 19:03:59,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:03:59,836 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:03:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:03:59,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465243448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:03:59,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:03:59,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:03:59,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818313813] [2022-03-03 19:03:59,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:03:59,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:03:59,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:03:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:03:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:03:59,859 INFO L87 Difference]: Start difference. First operand 1498 states and 4886 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:00,192 INFO L93 Difference]: Finished difference Result 1601 states and 5180 transitions. [2022-03-03 19:04:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:04:00,192 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:00,195 INFO L225 Difference]: With dead ends: 1601 [2022-03-03 19:04:00,195 INFO L226 Difference]: Without dead ends: 1542 [2022-03-03 19:04:00,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:04:00,195 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:00,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 238 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 411 Invalid, 0 Unknown, 201 Unchecked, 0.2s Time] [2022-03-03 19:04:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2022-03-03 19:04:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1499. [2022-03-03 19:04:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.2643524699599467) internal successors, (4890), 1498 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4890 transitions. [2022-03-03 19:04:00,211 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4890 transitions. Word has length 24 [2022-03-03 19:04:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:00,211 INFO L470 AbstractCegarLoop]: Abstraction has 1499 states and 4890 transitions. [2022-03-03 19:04:00,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4890 transitions. [2022-03-03 19:04:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:00,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:00,213 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:00,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:00,413 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,SelfDestructingSolverStorable159 [2022-03-03 19:04:00,413 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash 204379677, now seen corresponding path program 145 times [2022-03-03 19:04:00,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:00,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299662051] [2022-03-03 19:04:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:00,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:00,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:00,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299662051] [2022-03-03 19:04:00,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299662051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:00,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640029896] [2022-03-03 19:04:00,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:04:00,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:00,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:00,587 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) [2022-03-03 19:04:00,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-03 19:04:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:00,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:00,665 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 35 [2022-03-03 19:04:00,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:00,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-03 19:04:00,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:00,910 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 37 treesize of output 21 [2022-03-03 19:04:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:01,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:01,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:01,630 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-03 19:04:01,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:01,710 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 35 treesize of output 37 [2022-03-03 19:04:01,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:01,719 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 29 treesize of output 31 [2022-03-03 19:04:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:01,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640029896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:01,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:01,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:04:01,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967824982] [2022-03-03 19:04:01,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:01,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:04:01,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:01,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:04:01,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:04:01,745 INFO L87 Difference]: Start difference. First operand 1499 states and 4890 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:04:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:02,712 INFO L93 Difference]: Finished difference Result 1912 states and 5994 transitions. [2022-03-03 19:04:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:04:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:04:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:02,715 INFO L225 Difference]: With dead ends: 1912 [2022-03-03 19:04:02,715 INFO L226 Difference]: Without dead ends: 1793 [2022-03-03 19:04:02,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:04:02,716 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 179 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:02,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 402 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 945 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2022-03-03 19:04:02,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2022-03-03 19:04:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1513. [2022-03-03 19:04:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.261904761904762) internal successors, (4932), 1512 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4932 transitions. [2022-03-03 19:04:02,741 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4932 transitions. Word has length 24 [2022-03-03 19:04:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:02,741 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 4932 transitions. [2022-03-03 19:04:02,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:04:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4932 transitions. [2022-03-03 19:04:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:02,743 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:02,743 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:02,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:02,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:02,944 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash -651002653, now seen corresponding path program 146 times [2022-03-03 19:04:02,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:02,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357269984] [2022-03-03 19:04:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:02,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:03,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:03,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357269984] [2022-03-03 19:04:03,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357269984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:03,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390973282] [2022-03-03 19:04:03,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:04:03,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:03,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:03,118 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) [2022-03-03 19:04:03,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-03 19:04:03,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:04:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:03,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:03,183 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 35 [2022-03-03 19:04:03,300 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 [2022-03-03 19:04:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:03,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:03,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:03,827 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 50 treesize of output 47 [2022-03-03 19:04:03,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:03,873 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 31 treesize of output 33 [2022-03-03 19:04:03,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:03,876 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:04:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:03,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390973282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:03,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:03,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:03,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556453540] [2022-03-03 19:04:03,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:03,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:03,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:03,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:03,897 INFO L87 Difference]: Start difference. First operand 1513 states and 4932 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:05,097 INFO L93 Difference]: Finished difference Result 2088 states and 6548 transitions. [2022-03-03 19:04:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:04:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:05,100 INFO L225 Difference]: With dead ends: 2088 [2022-03-03 19:04:05,100 INFO L226 Difference]: Without dead ends: 1975 [2022-03-03 19:04:05,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:04:05,101 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:05,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 348 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:04:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2022-03-03 19:04:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1502. [2022-03-03 19:04:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.263157894736842) internal successors, (4898), 1501 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 4898 transitions. [2022-03-03 19:04:05,120 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 4898 transitions. Word has length 24 [2022-03-03 19:04:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:05,120 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 4898 transitions. [2022-03-03 19:04:05,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 4898 transitions. [2022-03-03 19:04:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:05,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:05,122 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:05,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-03 19:04:05,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:05,323 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash 488052761, now seen corresponding path program 147 times [2022-03-03 19:04:05,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:05,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910983216] [2022-03-03 19:04:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:05,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:05,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:05,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910983216] [2022-03-03 19:04:05,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910983216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:05,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459046590] [2022-03-03 19:04:05,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:04:05,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:05,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:05,549 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) [2022-03-03 19:04:05,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-03 19:04:05,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:04:05,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:05,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:05,637 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 41 treesize of output 35 [2022-03-03 19:04:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:05,906 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-03 19:04:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:05,909 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 37 treesize of output 21 [2022-03-03 19:04:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:06,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:06,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:06,679 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 120 treesize of output 104 [2022-03-03 19:04:06,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:06,771 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:04:06,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:06,774 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 25 treesize of output 27 [2022-03-03 19:04:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:06,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459046590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:06,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:06,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:06,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207767288] [2022-03-03 19:04:06,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:06,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:06,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:06,794 INFO L87 Difference]: Start difference. First operand 1502 states and 4898 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:07,929 INFO L93 Difference]: Finished difference Result 1703 states and 5418 transitions. [2022-03-03 19:04:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:04:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:07,932 INFO L225 Difference]: With dead ends: 1703 [2022-03-03 19:04:07,932 INFO L226 Difference]: Without dead ends: 1602 [2022-03-03 19:04:07,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:04:07,932 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 123 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:07,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 289 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 833 Invalid, 0 Unknown, 149 Unchecked, 0.3s Time] [2022-03-03 19:04:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2022-03-03 19:04:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1503. [2022-03-03 19:04:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.2643142476697737) internal successors, (4903), 1502 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 4903 transitions. [2022-03-03 19:04:07,949 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 4903 transitions. Word has length 24 [2022-03-03 19:04:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:07,949 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 4903 transitions. [2022-03-03 19:04:07,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 4903 transitions. [2022-03-03 19:04:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:07,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:07,951 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:07,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-03 19:04:08,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:08,151 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:08,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1382684903, now seen corresponding path program 148 times [2022-03-03 19:04:08,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:08,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779811633] [2022-03-03 19:04:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:08,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:04:08,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:08,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779811633] [2022-03-03 19:04:08,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779811633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:08,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133962451] [2022-03-03 19:04:08,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:04:08,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:08,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:08,309 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) [2022-03-03 19:04:08,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-03 19:04:08,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:04:08,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:08,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:08,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:08,377 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 35 [2022-03-03 19:04:08,465 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 41 [2022-03-03 19:04:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:04:08,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:09,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:09,447 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 73 treesize of output 67 [2022-03-03 19:04:09,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:09,533 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:04:09,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:09,537 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 29 treesize of output 31 [2022-03-03 19:04:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:04:09,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133962451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:09,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:09,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:09,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709983758] [2022-03-03 19:04:09,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:09,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:09,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:09,556 INFO L87 Difference]: Start difference. First operand 1503 states and 4903 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:11,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:11,824 INFO L93 Difference]: Finished difference Result 2958 states and 8849 transitions. [2022-03-03 19:04:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:04:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:11,829 INFO L225 Difference]: With dead ends: 2958 [2022-03-03 19:04:11,829 INFO L226 Difference]: Without dead ends: 2751 [2022-03-03 19:04:11,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:04:11,829 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 247 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:11,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 463 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:04:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2022-03-03 19:04:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 1519. [2022-03-03 19:04:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.2760210803689063) internal successors, (4973), 1518 states have internal predecessors, (4973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4973 transitions. [2022-03-03 19:04:11,856 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4973 transitions. Word has length 24 [2022-03-03 19:04:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:11,856 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 4973 transitions. [2022-03-03 19:04:11,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4973 transitions. [2022-03-03 19:04:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:11,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:11,858 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:11,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:12,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:12,058 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:12,058 INFO L85 PathProgramCache]: Analyzing trace with hash -202339021, now seen corresponding path program 149 times [2022-03-03 19:04:12,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:12,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826902385] [2022-03-03 19:04:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:12,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:12,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:12,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826902385] [2022-03-03 19:04:12,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826902385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:12,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491251122] [2022-03-03 19:04:12,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:04:12,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:12,265 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) [2022-03-03 19:04:12,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-03 19:04:12,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:04:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:12,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:12,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:12,361 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 [2022-03-03 19:04:12,430 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 [2022-03-03 19:04:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:12,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:13,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:13,059 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 120 treesize of output 104 [2022-03-03 19:04:13,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:13,189 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:04:13,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:13,193 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 25 treesize of output 27 [2022-03-03 19:04:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:13,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491251122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:13,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:13,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:04:13,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167944550] [2022-03-03 19:04:13,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:13,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:04:13,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:04:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:04:13,216 INFO L87 Difference]: Start difference. First operand 1519 states and 4973 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:13,738 INFO L93 Difference]: Finished difference Result 1924 states and 6073 transitions. [2022-03-03 19:04:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:04:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:13,741 INFO L225 Difference]: With dead ends: 1924 [2022-03-03 19:04:13,741 INFO L226 Difference]: Without dead ends: 1830 [2022-03-03 19:04:13,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:04:13,742 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:13,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 259 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 831 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-03-03 19:04:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-03-03 19:04:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1524. [2022-03-03 19:04:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 3.2718319107025606) internal successors, (4983), 1523 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4983 transitions. [2022-03-03 19:04:13,760 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4983 transitions. Word has length 24 [2022-03-03 19:04:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:13,760 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 4983 transitions. [2022-03-03 19:04:13,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4983 transitions. [2022-03-03 19:04:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:13,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:13,762 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:13,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:13,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:13,963 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1582657373, now seen corresponding path program 150 times [2022-03-03 19:04:13,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:13,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468535077] [2022-03-03 19:04:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:13,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:14,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:14,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468535077] [2022-03-03 19:04:14,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468535077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:14,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142057132] [2022-03-03 19:04:14,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:04:14,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:14,100 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) [2022-03-03 19:04:14,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-03 19:04:14,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:04:14,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:14,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:14,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:14,211 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 [2022-03-03 19:04:14,285 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 [2022-03-03 19:04:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:14,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:14,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:14,665 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 83 treesize of output 74 [2022-03-03 19:04:14,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:14,779 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 31 treesize of output 33 [2022-03-03 19:04:14,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:14,782 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 25 treesize of output 27 [2022-03-03 19:04:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:14,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142057132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:14,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:14,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-03 19:04:14,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756315021] [2022-03-03 19:04:14,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:14,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:04:14,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:14,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:04:14,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:04:14,813 INFO L87 Difference]: Start difference. First operand 1524 states and 4983 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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) [2022-03-03 19:04:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:15,181 INFO L93 Difference]: Finished difference Result 1656 states and 5359 transitions. [2022-03-03 19:04:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:04:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 24 [2022-03-03 19:04:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:15,184 INFO L225 Difference]: With dead ends: 1656 [2022-03-03 19:04:15,185 INFO L226 Difference]: Without dead ends: 1597 [2022-03-03 19:04:15,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:04:15,185 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:15,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 194 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:04:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2022-03-03 19:04:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1538. [2022-03-03 19:04:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.269355888093689) internal successors, (5025), 1537 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5025 transitions. [2022-03-03 19:04:15,202 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5025 transitions. Word has length 24 [2022-03-03 19:04:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:15,202 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 5025 transitions. [2022-03-03 19:04:15,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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) [2022-03-03 19:04:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5025 transitions. [2022-03-03 19:04:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:15,204 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:15,204 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:15,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-03 19:04:15,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:15,405 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:15,405 INFO L85 PathProgramCache]: Analyzing trace with hash 496636455, now seen corresponding path program 151 times [2022-03-03 19:04:15,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:15,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591350268] [2022-03-03 19:04:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:15,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:15,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:15,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591350268] [2022-03-03 19:04:15,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591350268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:15,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388494308] [2022-03-03 19:04:15,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:04:15,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:15,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:15,561 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) [2022-03-03 19:04:15,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-03 19:04:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:15,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:15,682 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 [2022-03-03 19:04:15,717 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 [2022-03-03 19:04:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:15,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:16,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:16,164 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 141 treesize of output 121 [2022-03-03 19:04:16,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:16,335 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 31 treesize of output 33 [2022-03-03 19:04:16,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:16,338 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 25 treesize of output 27 [2022-03-03 19:04:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:16,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388494308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:16,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:16,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 19:04:16,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282808716] [2022-03-03 19:04:16,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:16,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:04:16,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:04:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:04:16,358 INFO L87 Difference]: Start difference. First operand 1538 states and 5025 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-03-03 19:04:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:16,804 INFO L93 Difference]: Finished difference Result 1742 states and 5574 transitions. [2022-03-03 19:04:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:04:16,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 24 [2022-03-03 19:04:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:16,807 INFO L225 Difference]: With dead ends: 1742 [2022-03-03 19:04:16,807 INFO L226 Difference]: Without dead ends: 1665 [2022-03-03 19:04:16,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:04:16,808 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:16,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 217 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:04:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-03-03 19:04:16,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1538. [2022-03-03 19:04:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.269355888093689) internal successors, (5025), 1537 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5025 transitions. [2022-03-03 19:04:16,832 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5025 transitions. Word has length 24 [2022-03-03 19:04:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:16,833 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 5025 transitions. [2022-03-03 19:04:16,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-03-03 19:04:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5025 transitions. [2022-03-03 19:04:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:16,835 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:16,835 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:16,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:17,035 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,SelfDestructingSolverStorable166 [2022-03-03 19:04:17,035 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:17,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1652160081, now seen corresponding path program 152 times [2022-03-03 19:04:17,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:17,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037278856] [2022-03-03 19:04:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:17,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:17,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:17,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037278856] [2022-03-03 19:04:17,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037278856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:17,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192681006] [2022-03-03 19:04:17,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:04:17,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:17,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:17,169 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) [2022-03-03 19:04:17,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-03 19:04:17,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:04:17,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:17,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:17,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:17,288 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 [2022-03-03 19:04:17,318 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 [2022-03-03 19:04:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:17,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:17,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:17,800 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 143 treesize of output 123 [2022-03-03 19:04:18,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:18,045 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 31 treesize of output 33 [2022-03-03 19:04:18,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:18,048 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 25 treesize of output 27 [2022-03-03 19:04:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:18,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192681006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:18,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:18,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-03 19:04:18,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334495186] [2022-03-03 19:04:18,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:18,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:04:18,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:04:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:04:18,067 INFO L87 Difference]: Start difference. First operand 1538 states and 5025 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 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) [2022-03-03 19:04:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:18,480 INFO L93 Difference]: Finished difference Result 1777 states and 5690 transitions. [2022-03-03 19:04:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:04:18,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 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 24 [2022-03-03 19:04:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:18,483 INFO L225 Difference]: With dead ends: 1777 [2022-03-03 19:04:18,483 INFO L226 Difference]: Without dead ends: 1670 [2022-03-03 19:04:18,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:04:18,483 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 153 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:18,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 165 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:04:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-03-03 19:04:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1538. [2022-03-03 19:04:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.269355888093689) internal successors, (5025), 1537 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5025 transitions. [2022-03-03 19:04:18,501 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5025 transitions. Word has length 24 [2022-03-03 19:04:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:18,501 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 5025 transitions. [2022-03-03 19:04:18,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 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) [2022-03-03 19:04:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5025 transitions. [2022-03-03 19:04:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:18,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:18,503 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:18,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:18,703 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,SelfDestructingSolverStorable167 [2022-03-03 19:04:18,703 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:18,704 INFO L85 PathProgramCache]: Analyzing trace with hash 257836915, now seen corresponding path program 153 times [2022-03-03 19:04:18,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:18,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107142175] [2022-03-03 19:04:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:18,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:18,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:18,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107142175] [2022-03-03 19:04:18,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107142175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:18,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022142032] [2022-03-03 19:04:18,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:04:18,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:18,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:18,877 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) [2022-03-03 19:04:18,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-03 19:04:18,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:04:18,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:18,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:18,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:18,973 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 35 [2022-03-03 19:04:19,110 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 22 [2022-03-03 19:04:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:19,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:19,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:19,624 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 115 treesize of output 101 [2022-03-03 19:04:19,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:19,777 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 35 treesize of output 37 [2022-03-03 19:04:19,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:19,781 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:04:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:19,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022142032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:19,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:19,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:19,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168787762] [2022-03-03 19:04:19,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:19,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:19,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:19,801 INFO L87 Difference]: Start difference. First operand 1538 states and 5025 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:20,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:20,707 INFO L93 Difference]: Finished difference Result 1877 states and 5958 transitions. [2022-03-03 19:04:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:04:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:20,710 INFO L225 Difference]: With dead ends: 1877 [2022-03-03 19:04:20,710 INFO L226 Difference]: Without dead ends: 1760 [2022-03-03 19:04:20,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:04:20,710 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 125 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:20,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 278 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:04:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-03-03 19:04:20,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1561. [2022-03-03 19:04:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.2724358974358974) internal successors, (5105), 1560 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 5105 transitions. [2022-03-03 19:04:20,729 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 5105 transitions. Word has length 24 [2022-03-03 19:04:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:20,729 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 5105 transitions. [2022-03-03 19:04:20,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 5105 transitions. [2022-03-03 19:04:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:20,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:20,731 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:20,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-03 19:04:20,931 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,SelfDestructingSolverStorable168 [2022-03-03 19:04:20,931 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:20,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1421770089, now seen corresponding path program 154 times [2022-03-03 19:04:20,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:20,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69614819] [2022-03-03 19:04:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:20,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:21,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:21,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69614819] [2022-03-03 19:04:21,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69614819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:21,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544055733] [2022-03-03 19:04:21,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:04:21,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:21,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:21,124 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) [2022-03-03 19:04:21,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-03 19:04:21,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:04:21,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:21,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:21,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:21,228 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 35 [2022-03-03 19:04:21,310 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 41 [2022-03-03 19:04:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:21,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:21,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:21,906 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 141 treesize of output 121 [2022-03-03 19:04:22,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:22,056 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 31 treesize of output 33 [2022-03-03 19:04:22,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:22,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:04:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:22,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544055733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:22,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:22,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:22,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872722304] [2022-03-03 19:04:22,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:22,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:22,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:22,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:22,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:22,079 INFO L87 Difference]: Start difference. First operand 1561 states and 5105 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:22,971 INFO L93 Difference]: Finished difference Result 1928 states and 6136 transitions. [2022-03-03 19:04:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:04:22,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:22,974 INFO L225 Difference]: With dead ends: 1928 [2022-03-03 19:04:22,974 INFO L226 Difference]: Without dead ends: 1827 [2022-03-03 19:04:22,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:04:22,975 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 117 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:22,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 287 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:04:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2022-03-03 19:04:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1560. [2022-03-03 19:04:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.2713277742142397) internal successors, (5100), 1559 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5100 transitions. [2022-03-03 19:04:22,994 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5100 transitions. Word has length 24 [2022-03-03 19:04:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:22,994 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 5100 transitions. [2022-03-03 19:04:22,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5100 transitions. [2022-03-03 19:04:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:22,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:22,996 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:23,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-03 19:04:23,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:23,196 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:23,197 INFO L85 PathProgramCache]: Analyzing trace with hash 347156531, now seen corresponding path program 155 times [2022-03-03 19:04:23,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:23,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888466075] [2022-03-03 19:04:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:23,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:23,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:23,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888466075] [2022-03-03 19:04:23,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888466075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:23,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263462410] [2022-03-03 19:04:23,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:04:23,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:23,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:23,374 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) [2022-03-03 19:04:23,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-03 19:04:23,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:04:23,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:23,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:23,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:23,502 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:04:23,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:23,898 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-03 19:04:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:23,908 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 12 treesize of output 3 [2022-03-03 19:04:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:23,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:24,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:24,578 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-03 19:04:24,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:24,747 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 35 treesize of output 37 [2022-03-03 19:04:24,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:24,751 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:04:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:24,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263462410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:24,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:24,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:24,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108845746] [2022-03-03 19:04:24,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:24,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:24,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:24,773 INFO L87 Difference]: Start difference. First operand 1560 states and 5100 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:25,707 INFO L93 Difference]: Finished difference Result 1911 states and 6033 transitions. [2022-03-03 19:04:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:04:25,708 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:25,711 INFO L225 Difference]: With dead ends: 1911 [2022-03-03 19:04:25,711 INFO L226 Difference]: Without dead ends: 1789 [2022-03-03 19:04:25,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:04:25,711 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:25,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 312 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 859 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2022-03-03 19:04:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-03-03 19:04:25,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1567. [2022-03-03 19:04:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.2745849297573435) internal successors, (5128), 1566 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5128 transitions. [2022-03-03 19:04:25,730 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5128 transitions. Word has length 24 [2022-03-03 19:04:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:25,730 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 5128 transitions. [2022-03-03 19:04:25,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5128 transitions. [2022-03-03 19:04:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:25,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:25,732 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:25,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-03 19:04:25,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:25,933 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1705443173, now seen corresponding path program 156 times [2022-03-03 19:04:25,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:25,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38590166] [2022-03-03 19:04:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:25,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:26,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:26,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38590166] [2022-03-03 19:04:26,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38590166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:26,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371151420] [2022-03-03 19:04:26,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:04:26,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:26,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:26,145 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) [2022-03-03 19:04:26,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-03 19:04:26,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:04:26,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:26,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:26,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:26,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:26,277 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 41 treesize of output 35 [2022-03-03 19:04:26,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:26,428 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 47 treesize of output 41 [2022-03-03 19:04:26,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:26,431 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:04:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:26,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:27,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:27,265 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 110 treesize of output 98 [2022-03-03 19:04:27,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:27,441 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:04:27,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:27,444 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 29 treesize of output 31 [2022-03-03 19:04:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:27,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371151420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:27,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:27,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:27,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678854448] [2022-03-03 19:04:27,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:27,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:27,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:27,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:27,467 INFO L87 Difference]: Start difference. First operand 1567 states and 5128 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:29,656 INFO L93 Difference]: Finished difference Result 2468 states and 7387 transitions. [2022-03-03 19:04:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:04:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:29,660 INFO L225 Difference]: With dead ends: 2468 [2022-03-03 19:04:29,660 INFO L226 Difference]: Without dead ends: 2264 [2022-03-03 19:04:29,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:04:29,660 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 322 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:29,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 363 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 971 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-03-03 19:04:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2022-03-03 19:04:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1575. [2022-03-03 19:04:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.280813214739517) internal successors, (5164), 1574 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5164 transitions. [2022-03-03 19:04:29,684 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5164 transitions. Word has length 24 [2022-03-03 19:04:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:29,684 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5164 transitions. [2022-03-03 19:04:29,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5164 transitions. [2022-03-03 19:04:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:29,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:29,687 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:29,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:29,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:29,887 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2084066715, now seen corresponding path program 157 times [2022-03-03 19:04:29,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:29,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732525142] [2022-03-03 19:04:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:29,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:30,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:30,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732525142] [2022-03-03 19:04:30,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732525142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:30,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128759677] [2022-03-03 19:04:30,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:04:30,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:30,089 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) [2022-03-03 19:04:30,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-03 19:04:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:30,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:30,200 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 35 [2022-03-03 19:04:30,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:30,265 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 47 treesize of output 41 [2022-03-03 19:04:30,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:30,267 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 37 treesize of output 21 [2022-03-03 19:04:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:30,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:31,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:31,306 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 110 treesize of output 98 [2022-03-03 19:04:31,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:31,464 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 35 treesize of output 37 [2022-03-03 19:04:31,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:31,467 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 29 treesize of output 31 [2022-03-03 19:04:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:31,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128759677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:31,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:31,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:04:31,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131160011] [2022-03-03 19:04:31,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:31,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:04:31,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:04:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:04:31,491 INFO L87 Difference]: Start difference. First operand 1575 states and 5164 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-03-03 19:04:32,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:32,882 INFO L93 Difference]: Finished difference Result 2520 states and 7685 transitions. [2022-03-03 19:04:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:04:32,882 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-03-03 19:04:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:32,886 INFO L225 Difference]: With dead ends: 2520 [2022-03-03 19:04:32,886 INFO L226 Difference]: Without dead ends: 2336 [2022-03-03 19:04:32,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:04:32,887 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 195 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:32,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 460 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1365 Invalid, 0 Unknown, 7 Unchecked, 0.6s Time] [2022-03-03 19:04:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2022-03-03 19:04:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1600. [2022-03-03 19:04:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.302689180737961) internal successors, (5281), 1599 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5281 transitions. [2022-03-03 19:04:32,910 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5281 transitions. Word has length 24 [2022-03-03 19:04:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:32,910 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 5281 transitions. [2022-03-03 19:04:32,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-03-03 19:04:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5281 transitions. [2022-03-03 19:04:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:32,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:32,912 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:32,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-03 19:04:33,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-03 19:04:33,113 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash 752430849, now seen corresponding path program 158 times [2022-03-03 19:04:33,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:33,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354681579] [2022-03-03 19:04:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:33,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:33,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:33,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354681579] [2022-03-03 19:04:33,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354681579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:33,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949909970] [2022-03-03 19:04:33,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:04:33,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:33,279 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) [2022-03-03 19:04:33,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-03 19:04:33,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:04:33,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:33,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:33,377 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 [2022-03-03 19:04:33,448 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 [2022-03-03 19:04:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:33,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:34,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:34,045 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 80 treesize of output 73 [2022-03-03 19:04:34,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:34,184 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 31 treesize of output 33 [2022-03-03 19:04:34,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:34,188 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 25 treesize of output 27 [2022-03-03 19:04:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:34,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949909970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:34,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:34,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:04:34,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851345108] [2022-03-03 19:04:34,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:34,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:04:34,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:34,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:04:34,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:04:34,205 INFO L87 Difference]: Start difference. First operand 1600 states and 5281 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:34,645 INFO L93 Difference]: Finished difference Result 1836 states and 5956 transitions. [2022-03-03 19:04:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:04:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:34,649 INFO L225 Difference]: With dead ends: 1836 [2022-03-03 19:04:34,649 INFO L226 Difference]: Without dead ends: 1775 [2022-03-03 19:04:34,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:04:34,649 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:34,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 236 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:04:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-03-03 19:04:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1616. [2022-03-03 19:04:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 3.2959752321981424) internal successors, (5323), 1615 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5323 transitions. [2022-03-03 19:04:34,669 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5323 transitions. Word has length 24 [2022-03-03 19:04:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:34,669 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 5323 transitions. [2022-03-03 19:04:34,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5323 transitions. [2022-03-03 19:04:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:34,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:34,671 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:34,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:34,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:34,882 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:34,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:34,882 INFO L85 PathProgramCache]: Analyzing trace with hash -873204247, now seen corresponding path program 159 times [2022-03-03 19:04:34,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:34,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763197088] [2022-03-03 19:04:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:35,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:35,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763197088] [2022-03-03 19:04:35,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763197088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:35,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250909151] [2022-03-03 19:04:35,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:04:35,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:35,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:35,023 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) [2022-03-03 19:04:35,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-03 19:04:35,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:04:35,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:35,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:35,220 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 23 treesize of output 19 [2022-03-03 19:04:35,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:35,253 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:04:35,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:35,256 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 12 treesize of output 3 [2022-03-03 19:04:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:35,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:35,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:35,652 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-03-03 19:04:35,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:35,841 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:04:35,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:35,845 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:04:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:35,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250909151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:35,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:35,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:04:35,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115055722] [2022-03-03 19:04:35,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:35,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:04:35,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:04:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:04:35,865 INFO L87 Difference]: Start difference. First operand 1616 states and 5323 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:36,018 INFO L93 Difference]: Finished difference Result 1698 states and 5571 transitions. [2022-03-03 19:04:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:04:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:36,021 INFO L225 Difference]: With dead ends: 1698 [2022-03-03 19:04:36,021 INFO L226 Difference]: Without dead ends: 1667 [2022-03-03 19:04:36,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:36,021 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:36,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 150 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 335 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-03-03 19:04:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-03-03 19:04:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1623. [2022-03-03 19:04:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.2990135635018496) internal successors, (5351), 1622 states have internal predecessors, (5351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5351 transitions. [2022-03-03 19:04:36,040 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5351 transitions. Word has length 24 [2022-03-03 19:04:36,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:36,040 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 5351 transitions. [2022-03-03 19:04:36,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:36,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5351 transitions. [2022-03-03 19:04:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:36,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:36,042 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:36,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-03 19:04:36,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:36,242 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash -286288645, now seen corresponding path program 160 times [2022-03-03 19:04:36,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:36,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096659404] [2022-03-03 19:04:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:36,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:36,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:36,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096659404] [2022-03-03 19:04:36,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096659404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:36,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240316580] [2022-03-03 19:04:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:04:36,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:36,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:36,362 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) [2022-03-03 19:04:36,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-03 19:04:36,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:04:36,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:36,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:36,491 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 19 treesize of output 15 [2022-03-03 19:04:36,539 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 [2022-03-03 19:04:36,541 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 25 treesize of output 17 [2022-03-03 19:04:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:36,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:36,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:36,898 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 111 treesize of output 97 [2022-03-03 19:04:37,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:37,140 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 35 treesize of output 37 [2022-03-03 19:04:37,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:37,144 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 29 treesize of output 31 [2022-03-03 19:04:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:37,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240316580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:37,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:37,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:04:37,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501032118] [2022-03-03 19:04:37,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:37,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:04:37,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:04:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:04:37,167 INFO L87 Difference]: Start difference. First operand 1623 states and 5351 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:04:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:37,637 INFO L93 Difference]: Finished difference Result 1903 states and 6144 transitions. [2022-03-03 19:04:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:04:37,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:04:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:37,640 INFO L225 Difference]: With dead ends: 1903 [2022-03-03 19:04:37,640 INFO L226 Difference]: Without dead ends: 1785 [2022-03-03 19:04:37,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:04:37,641 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:37,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 234 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:04:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-03-03 19:04:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1629. [2022-03-03 19:04:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.2936117936117935) internal successors, (5362), 1628 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5362 transitions. [2022-03-03 19:04:37,659 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5362 transitions. Word has length 24 [2022-03-03 19:04:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:37,659 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 5362 transitions. [2022-03-03 19:04:37,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:04:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5362 transitions. [2022-03-03 19:04:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:37,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:37,662 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:37,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-03 19:04:37,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:37,862 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1152180817, now seen corresponding path program 161 times [2022-03-03 19:04:37,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:37,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410452213] [2022-03-03 19:04:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:37,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:38,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:38,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410452213] [2022-03-03 19:04:38,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410452213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:38,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811530964] [2022-03-03 19:04:38,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:04:38,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:38,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:38,001 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) [2022-03-03 19:04:38,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-03 19:04:38,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:04:38,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:38,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:38,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:38,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:38,192 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:04:38,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:38,234 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:04:38,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:38,237 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 15 treesize of output 7 [2022-03-03 19:04:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:38,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:38,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:38,681 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 80 treesize of output 73 [2022-03-03 19:04:38,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:38,836 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:04:38,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:38,839 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 25 treesize of output 27 [2022-03-03 19:04:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:38,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811530964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:38,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:38,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:04:38,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006402294] [2022-03-03 19:04:38,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:38,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:04:38,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:04:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:04:38,865 INFO L87 Difference]: Start difference. First operand 1629 states and 5362 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:39,056 INFO L93 Difference]: Finished difference Result 1737 states and 5680 transitions. [2022-03-03 19:04:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:04:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:39,059 INFO L225 Difference]: With dead ends: 1737 [2022-03-03 19:04:39,059 INFO L226 Difference]: Without dead ends: 1710 [2022-03-03 19:04:39,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:39,060 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:39,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 187 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 427 Invalid, 0 Unknown, 301 Unchecked, 0.2s Time] [2022-03-03 19:04:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-03-03 19:04:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1629. [2022-03-03 19:04:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.2936117936117935) internal successors, (5362), 1628 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5362 transitions. [2022-03-03 19:04:39,078 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5362 transitions. Word has length 24 [2022-03-03 19:04:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:39,078 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 5362 transitions. [2022-03-03 19:04:39,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5362 transitions. [2022-03-03 19:04:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:39,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:39,081 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:39,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-03 19:04:39,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:39,281 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1454965027, now seen corresponding path program 162 times [2022-03-03 19:04:39,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:39,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803966852] [2022-03-03 19:04:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:39,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:39,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:39,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803966852] [2022-03-03 19:04:39,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803966852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:39,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364227359] [2022-03-03 19:04:39,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:04:39,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:39,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:39,482 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) [2022-03-03 19:04:39,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-03 19:04:39,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:04:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:39,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:39,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:39,623 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 41 treesize of output 35 [2022-03-03 19:04:39,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:39,680 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 43 treesize of output 37 [2022-03-03 19:04:39,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:39,682 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 37 treesize of output 21 [2022-03-03 19:04:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:39,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:40,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:40,511 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 143 treesize of output 123 [2022-03-03 19:04:40,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:40,679 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 31 treesize of output 33 [2022-03-03 19:04:40,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:40,683 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 25 treesize of output 27 [2022-03-03 19:04:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:40,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364227359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:40,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:40,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:40,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987500071] [2022-03-03 19:04:40,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:40,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:40,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:40,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:40,704 INFO L87 Difference]: Start difference. First operand 1629 states and 5362 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:41,004 INFO L93 Difference]: Finished difference Result 1760 states and 5725 transitions. [2022-03-03 19:04:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:04:41,005 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:41,008 INFO L225 Difference]: With dead ends: 1760 [2022-03-03 19:04:41,008 INFO L226 Difference]: Without dead ends: 1694 [2022-03-03 19:04:41,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:04:41,008 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 84 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:41,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 187 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 488 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-03-03 19:04:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-03-03 19:04:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1630. [2022-03-03 19:04:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.2940454266421115) internal successors, (5366), 1629 states have internal predecessors, (5366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5366 transitions. [2022-03-03 19:04:41,027 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5366 transitions. Word has length 24 [2022-03-03 19:04:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:41,027 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 5366 transitions. [2022-03-03 19:04:41,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5366 transitions. [2022-03-03 19:04:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:41,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:41,029 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:41,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-03 19:04:41,230 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,SelfDestructingSolverStorable177 [2022-03-03 19:04:41,230 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:41,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1570485741, now seen corresponding path program 163 times [2022-03-03 19:04:41,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:41,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770886381] [2022-03-03 19:04:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:41,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:41,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:41,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770886381] [2022-03-03 19:04:41,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770886381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:41,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201604595] [2022-03-03 19:04:41,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:04:41,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:41,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:41,462 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) [2022-03-03 19:04:41,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-03 19:04:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:41,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:41,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:41,591 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 41 treesize of output 35 [2022-03-03 19:04:41,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:41,695 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 24 treesize of output 20 [2022-03-03 19:04:41,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:41,697 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:04:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:41,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:42,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:42,463 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 143 treesize of output 123 [2022-03-03 19:04:42,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:42,617 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 31 treesize of output 33 [2022-03-03 19:04:42,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:42,620 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 25 treesize of output 27 [2022-03-03 19:04:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:42,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201604595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:42,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:42,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:42,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437630168] [2022-03-03 19:04:42,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:42,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:42,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:42,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:42,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:42,641 INFO L87 Difference]: Start difference. First operand 1630 states and 5366 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:42,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:42,832 INFO L93 Difference]: Finished difference Result 1767 states and 5772 transitions. [2022-03-03 19:04:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:04:42,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:42,836 INFO L225 Difference]: With dead ends: 1767 [2022-03-03 19:04:42,836 INFO L226 Difference]: Without dead ends: 1709 [2022-03-03 19:04:42,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:04:42,836 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:42,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 154 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 355 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-03-03 19:04:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-03-03 19:04:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1630. [2022-03-03 19:04:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.2940454266421115) internal successors, (5366), 1629 states have internal predecessors, (5366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5366 transitions. [2022-03-03 19:04:42,854 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5366 transitions. Word has length 24 [2022-03-03 19:04:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:42,854 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 5366 transitions. [2022-03-03 19:04:42,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5366 transitions. [2022-03-03 19:04:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:42,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:42,857 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:42,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-03-03 19:04:43,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:43,060 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:43,060 INFO L85 PathProgramCache]: Analyzing trace with hash 907042289, now seen corresponding path program 164 times [2022-03-03 19:04:43,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:43,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286489319] [2022-03-03 19:04:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:43,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:43,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:43,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286489319] [2022-03-03 19:04:43,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286489319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:43,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235833993] [2022-03-03 19:04:43,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:04:43,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:43,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:43,265 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) [2022-03-03 19:04:43,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-03 19:04:43,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:04:43,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:43,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:43,398 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:04:43,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:43,556 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 24 treesize of output 20 [2022-03-03 19:04:43,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:43,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:04:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:43,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:44,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:44,340 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 143 treesize of output 123 [2022-03-03 19:04:44,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:44,504 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 31 treesize of output 33 [2022-03-03 19:04:44,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:44,507 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 25 treesize of output 27 [2022-03-03 19:04:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:44,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235833993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:44,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:44,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:44,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836509612] [2022-03-03 19:04:44,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:44,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:44,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:44,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:44,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:44,528 INFO L87 Difference]: Start difference. First operand 1630 states and 5366 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:44,720 INFO L93 Difference]: Finished difference Result 1711 states and 5601 transitions. [2022-03-03 19:04:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:04:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:44,723 INFO L225 Difference]: With dead ends: 1711 [2022-03-03 19:04:44,723 INFO L226 Difference]: Without dead ends: 1696 [2022-03-03 19:04:44,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:04:44,723 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:44,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 177 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 438 Invalid, 0 Unknown, 197 Unchecked, 0.2s Time] [2022-03-03 19:04:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-03-03 19:04:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1636. [2022-03-03 19:04:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.2972477064220183) internal successors, (5391), 1635 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5391 transitions. [2022-03-03 19:04:44,742 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5391 transitions. Word has length 24 [2022-03-03 19:04:44,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:44,742 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 5391 transitions. [2022-03-03 19:04:44,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:44,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5391 transitions. [2022-03-03 19:04:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:44,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:44,744 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:44,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-03 19:04:44,944 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,SelfDestructingSolverStorable179 [2022-03-03 19:04:44,944 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:44,945 INFO L85 PathProgramCache]: Analyzing trace with hash 589001779, now seen corresponding path program 165 times [2022-03-03 19:04:44,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:44,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126380028] [2022-03-03 19:04:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:44,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:45,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:45,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126380028] [2022-03-03 19:04:45,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126380028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:45,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071477146] [2022-03-03 19:04:45,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:04:45,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:45,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:45,154 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) [2022-03-03 19:04:45,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-03 19:04:45,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:04:45,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:45,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:45,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:45,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:04:45,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:45,494 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 24 treesize of output 20 [2022-03-03 19:04:45,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:45,497 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:04:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:45,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:46,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:46,175 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 102 treesize of output 90 [2022-03-03 19:04:46,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:46,351 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:04:46,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:46,355 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:04:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:46,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071477146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:46,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:46,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:46,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222754544] [2022-03-03 19:04:46,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:46,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:46,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:46,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:46,380 INFO L87 Difference]: Start difference. First operand 1636 states and 5391 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:47,257 INFO L93 Difference]: Finished difference Result 2059 states and 6470 transitions. [2022-03-03 19:04:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:04:47,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:47,261 INFO L225 Difference]: With dead ends: 2059 [2022-03-03 19:04:47,261 INFO L226 Difference]: Without dead ends: 1905 [2022-03-03 19:04:47,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:04:47,261 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 199 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:47,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 324 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 411 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-03-03 19:04:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2022-03-03 19:04:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1645. [2022-03-03 19:04:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.3017031630170317) internal successors, (5428), 1644 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5428 transitions. [2022-03-03 19:04:47,282 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5428 transitions. Word has length 24 [2022-03-03 19:04:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:47,282 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 5428 transitions. [2022-03-03 19:04:47,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5428 transitions. [2022-03-03 19:04:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:47,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:47,285 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:47,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:47,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:47,485 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1175917381, now seen corresponding path program 166 times [2022-03-03 19:04:47,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:47,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348942476] [2022-03-03 19:04:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:47,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:47,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348942476] [2022-03-03 19:04:47,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348942476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:47,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520289954] [2022-03-03 19:04:47,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:04:47,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:47,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:47,680 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) [2022-03-03 19:04:47,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-03 19:04:47,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:04:47,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:47,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:47,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:47,826 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 41 treesize of output 35 [2022-03-03 19:04:48,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:48,040 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 29 treesize of output 23 [2022-03-03 19:04:48,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:48,043 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-03-03 19:04:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:48,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:48,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:48,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:04:48,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:48,860 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 31 treesize of output 33 [2022-03-03 19:04:48,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:48,864 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:04:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:48,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520289954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:48,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:48,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:48,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651612205] [2022-03-03 19:04:48,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:48,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:48,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:48,884 INFO L87 Difference]: Start difference. First operand 1645 states and 5428 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:49,021 INFO L93 Difference]: Finished difference Result 1721 states and 5621 transitions. [2022-03-03 19:04:49,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:04:49,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:49,024 INFO L225 Difference]: With dead ends: 1721 [2022-03-03 19:04:49,024 INFO L226 Difference]: Without dead ends: 1714 [2022-03-03 19:04:49,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:49,024 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:49,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 221 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 327 Invalid, 0 Unknown, 311 Unchecked, 0.1s Time] [2022-03-03 19:04:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-03-03 19:04:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1661. [2022-03-03 19:04:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.293975903614458) internal successors, (5468), 1660 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5468 transitions. [2022-03-03 19:04:49,043 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5468 transitions. Word has length 24 [2022-03-03 19:04:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:49,043 INFO L470 AbstractCegarLoop]: Abstraction has 1661 states and 5468 transitions. [2022-03-03 19:04:49,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5468 transitions. [2022-03-03 19:04:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:49,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:49,045 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:49,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-03 19:04:49,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:49,246 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:49,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:49,246 INFO L85 PathProgramCache]: Analyzing trace with hash -368448059, now seen corresponding path program 167 times [2022-03-03 19:04:49,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:49,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277899949] [2022-03-03 19:04:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:49,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:49,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:49,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277899949] [2022-03-03 19:04:49,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277899949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:49,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846879632] [2022-03-03 19:04:49,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:04:49,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:49,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:49,441 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) [2022-03-03 19:04:49,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-03 19:04:49,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:04:49,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:49,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:49,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:49,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:49,572 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 [2022-03-03 19:04:49,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:49,724 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 21 treesize of output 17 [2022-03-03 19:04:49,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:49,727 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:04:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:49,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:50,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:50,342 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-03-03 19:04:50,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:50,451 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:04:50,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:50,455 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:04:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:50,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846879632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:50,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:50,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:50,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179278356] [2022-03-03 19:04:50,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:50,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:50,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:50,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:50,475 INFO L87 Difference]: Start difference. First operand 1661 states and 5468 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:50,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:50,799 INFO L93 Difference]: Finished difference Result 1720 states and 5614 transitions. [2022-03-03 19:04:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:04:50,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:50,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:50,802 INFO L225 Difference]: With dead ends: 1720 [2022-03-03 19:04:50,802 INFO L226 Difference]: Without dead ends: 1689 [2022-03-03 19:04:50,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:04:50,802 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:50,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 236 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 541 Invalid, 0 Unknown, 313 Unchecked, 0.2s Time] [2022-03-03 19:04:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-03-03 19:04:50,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1645. [2022-03-03 19:04:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.3017031630170317) internal successors, (5428), 1644 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5428 transitions. [2022-03-03 19:04:50,822 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5428 transitions. Word has length 24 [2022-03-03 19:04:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:50,822 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 5428 transitions. [2022-03-03 19:04:50,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5428 transitions. [2022-03-03 19:04:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:50,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:50,825 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:50,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-03 19:04:51,035 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,SelfDestructingSolverStorable182 [2022-03-03 19:04:51,035 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash 691514611, now seen corresponding path program 168 times [2022-03-03 19:04:51,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:51,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443619760] [2022-03-03 19:04:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:51,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:51,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:51,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443619760] [2022-03-03 19:04:51,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443619760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:51,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102390961] [2022-03-03 19:04:51,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:04:51,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:51,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:51,236 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) [2022-03-03 19:04:51,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-03 19:04:51,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:04:51,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:51,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:51,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:51,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:51,402 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 41 treesize of output 35 [2022-03-03 19:04:51,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:51,505 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-03 19:04:51,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:51,507 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 37 treesize of output 21 [2022-03-03 19:04:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:51,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:52,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:52,087 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 141 treesize of output 121 [2022-03-03 19:04:52,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:52,293 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 31 treesize of output 33 [2022-03-03 19:04:52,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:52,296 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 25 treesize of output 27 [2022-03-03 19:04:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:52,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102390961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:52,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:52,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:52,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938037088] [2022-03-03 19:04:52,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:52,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:52,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:52,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:52,316 INFO L87 Difference]: Start difference. First operand 1645 states and 5428 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:52,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:52,673 INFO L93 Difference]: Finished difference Result 1745 states and 5699 transitions. [2022-03-03 19:04:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:04:52,674 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:52,676 INFO L225 Difference]: With dead ends: 1745 [2022-03-03 19:04:52,676 INFO L226 Difference]: Without dead ends: 1710 [2022-03-03 19:04:52,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:04:52,677 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:52,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 274 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 684 Invalid, 0 Unknown, 169 Unchecked, 0.3s Time] [2022-03-03 19:04:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-03-03 19:04:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1645. [2022-03-03 19:04:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.3017031630170317) internal successors, (5428), 1644 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5428 transitions. [2022-03-03 19:04:52,695 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5428 transitions. Word has length 24 [2022-03-03 19:04:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:52,696 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 5428 transitions. [2022-03-03 19:04:52,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5428 transitions. [2022-03-03 19:04:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:52,698 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:52,698 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:52,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-03 19:04:52,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:52,899 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:52,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:52,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1380524797, now seen corresponding path program 169 times [2022-03-03 19:04:52,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:52,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795642126] [2022-03-03 19:04:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:52,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:53,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:53,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795642126] [2022-03-03 19:04:53,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795642126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:53,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310943149] [2022-03-03 19:04:53,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:04:53,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:53,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:53,042 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) [2022-03-03 19:04:53,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-03 19:04:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:53,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:53,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:53,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:53,174 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 41 treesize of output 35 [2022-03-03 19:04:53,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:53,293 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 24 treesize of output 20 [2022-03-03 19:04:53,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:53,296 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 12 treesize of output 3 [2022-03-03 19:04:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:53,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:53,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:53,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:04:53,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:53,968 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 31 treesize of output 33 [2022-03-03 19:04:53,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:53,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:04:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:53,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310943149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:53,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:53,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:53,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837262060] [2022-03-03 19:04:53,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:53,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:53,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:53,992 INFO L87 Difference]: Start difference. First operand 1645 states and 5428 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:54,329 INFO L93 Difference]: Finished difference Result 1784 states and 5765 transitions. [2022-03-03 19:04:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:04:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:54,333 INFO L225 Difference]: With dead ends: 1784 [2022-03-03 19:04:54,333 INFO L226 Difference]: Without dead ends: 1711 [2022-03-03 19:04:54,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:04:54,333 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:54,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 210 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 610 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-03-03 19:04:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2022-03-03 19:04:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1645. [2022-03-03 19:04:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.3017031630170317) internal successors, (5428), 1644 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5428 transitions. [2022-03-03 19:04:54,353 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5428 transitions. Word has length 24 [2022-03-03 19:04:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:54,353 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 5428 transitions. [2022-03-03 19:04:54,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5428 transitions. [2022-03-03 19:04:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:54,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:54,356 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:54,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-03 19:04:54,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:54,556 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:54,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash 61894819, now seen corresponding path program 170 times [2022-03-03 19:04:54,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:54,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537262200] [2022-03-03 19:04:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:54,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:54,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537262200] [2022-03-03 19:04:54,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537262200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:54,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144234478] [2022-03-03 19:04:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:04:54,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:54,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:54,707 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) [2022-03-03 19:04:54,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-03 19:04:54,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:04:54,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:04:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:54,794 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 39 treesize of output 33 [2022-03-03 19:04:54,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 22 [2022-03-03 19:04:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:54,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:55,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:55,253 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 57 treesize of output 57 [2022-03-03 19:04:55,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:55,442 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 87 treesize of output 78 [2022-03-03 19:04:55,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:55,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 60 [2022-03-03 19:04:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:55,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144234478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:55,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:55,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:04:55,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823884869] [2022-03-03 19:04:55,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:55,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:04:55,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:04:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:04:55,540 INFO L87 Difference]: Start difference. First operand 1645 states and 5428 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:04:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:55,928 INFO L93 Difference]: Finished difference Result 1744 states and 5706 transitions. [2022-03-03 19:04:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:04:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 24 [2022-03-03 19:04:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:55,931 INFO L225 Difference]: With dead ends: 1744 [2022-03-03 19:04:55,931 INFO L226 Difference]: Without dead ends: 1685 [2022-03-03 19:04:55,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:04:55,932 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:55,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 180 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:04:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2022-03-03 19:04:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1649. [2022-03-03 19:04:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.3009708737864076) internal successors, (5440), 1648 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5440 transitions. [2022-03-03 19:04:55,950 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5440 transitions. Word has length 24 [2022-03-03 19:04:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:55,950 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 5440 transitions. [2022-03-03 19:04:55,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:04:55,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5440 transitions. [2022-03-03 19:04:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:55,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:55,953 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:55,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-03 19:04:56,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:56,153 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1225827993, now seen corresponding path program 171 times [2022-03-03 19:04:56,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:56,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880113372] [2022-03-03 19:04:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:56,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:56,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880113372] [2022-03-03 19:04:56,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880113372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:56,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083158510] [2022-03-03 19:04:56,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:04:56,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:56,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:56,338 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) [2022-03-03 19:04:56,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-03 19:04:56,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:04:56,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:56,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:56,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:56,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:56,524 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 53 treesize of output 45 [2022-03-03 19:04:56,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:56,609 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 47 treesize of output 41 [2022-03-03 19:04:56,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:56,612 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 37 treesize of output 21 [2022-03-03 19:04:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:56,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:57,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:57,188 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 61 treesize of output 61 [2022-03-03 19:04:57,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:57,377 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 122 treesize of output 108 [2022-03-03 19:04:57,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:57,382 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-03-03 19:04:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:57,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083158510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:57,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:57,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:04:57,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660865445] [2022-03-03 19:04:57,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:57,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:04:57,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:57,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:04:57,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:04:57,484 INFO L87 Difference]: Start difference. First operand 1649 states and 5440 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:57,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:57,802 INFO L93 Difference]: Finished difference Result 1831 states and 5906 transitions. [2022-03-03 19:04:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:04:57,802 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:04:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:57,805 INFO L225 Difference]: With dead ends: 1831 [2022-03-03 19:04:57,805 INFO L226 Difference]: Without dead ends: 1751 [2022-03-03 19:04:57,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:04:57,805 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:57,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 237 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 650 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-03-03 19:04:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-03-03 19:04:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1649. [2022-03-03 19:04:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.3009708737864076) internal successors, (5440), 1648 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5440 transitions. [2022-03-03 19:04:57,824 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5440 transitions. Word has length 24 [2022-03-03 19:04:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:57,824 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 5440 transitions. [2022-03-03 19:04:57,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5440 transitions. [2022-03-03 19:04:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:57,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:57,826 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:57,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-03 19:04:58,026 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,SelfDestructingSolverStorable186 [2022-03-03 19:04:58,027 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:04:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:04:58,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1593521725, now seen corresponding path program 172 times [2022-03-03 19:04:58,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:04:58,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617181181] [2022-03-03 19:04:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:04:58,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:04:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:04:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:58,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:04:58,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617181181] [2022-03-03 19:04:58,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617181181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:04:58,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885306699] [2022-03-03 19:04:58,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:04:58,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:04:58,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:04:58,216 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) [2022-03-03 19:04:58,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-03 19:04:58,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:04:58,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:04:58,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:04:58,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:04:58,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:58,409 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 35 treesize of output 29 [2022-03-03 19:04:58,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:58,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:04:58,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:04:58,461 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 37 treesize of output 21 [2022-03-03 19:04:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:58,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:04:59,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:59,051 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 108 treesize of output 102 [2022-03-03 19:04:59,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:59,289 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 119 treesize of output 105 [2022-03-03 19:04:59,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:04:59,295 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 97 treesize of output 83 [2022-03-03 19:04:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:04:59,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885306699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:04:59,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:04:59,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:04:59,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361181165] [2022-03-03 19:04:59,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:04:59,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:04:59,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:04:59,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:04:59,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:04:59,380 INFO L87 Difference]: Start difference. First operand 1649 states and 5440 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:04:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:04:59,812 INFO L93 Difference]: Finished difference Result 1867 states and 6004 transitions. [2022-03-03 19:04:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:04:59,813 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:04:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:04:59,816 INFO L225 Difference]: With dead ends: 1867 [2022-03-03 19:04:59,816 INFO L226 Difference]: Without dead ends: 1763 [2022-03-03 19:04:59,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:04:59,816 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:04:59,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 272 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 725 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2022-03-03 19:04:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2022-03-03 19:04:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1651. [2022-03-03 19:04:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.3012121212121213) internal successors, (5447), 1650 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:04:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5447 transitions. [2022-03-03 19:04:59,835 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5447 transitions. Word has length 24 [2022-03-03 19:04:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:04:59,835 INFO L470 AbstractCegarLoop]: Abstraction has 1651 states and 5447 transitions. [2022-03-03 19:04:59,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:04:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5447 transitions. [2022-03-03 19:04:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:04:59,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:04:59,837 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:04:59,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-03 19:05:00,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:00,038 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:00,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:00,038 INFO L85 PathProgramCache]: Analyzing trace with hash 688380835, now seen corresponding path program 173 times [2022-03-03 19:05:00,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:00,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386151348] [2022-03-03 19:05:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:00,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:00,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:00,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386151348] [2022-03-03 19:05:00,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386151348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:00,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721303509] [2022-03-03 19:05:00,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:05:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:00,202 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) [2022-03-03 19:05:00,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-03 19:05:00,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:05:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:00,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:05:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:00,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:00,377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-03 19:05:00,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:00,454 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-03 19:05:00,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:00,457 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 53 treesize of output 33 [2022-03-03 19:05:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:00,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:00,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:00,871 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-03-03 19:05:01,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:01,097 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 119 treesize of output 105 [2022-03-03 19:05:01,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:01,102 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 97 treesize of output 83 [2022-03-03 19:05:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:01,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721303509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:01,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:01,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:01,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56378610] [2022-03-03 19:05:01,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:01,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:01,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:01,210 INFO L87 Difference]: Start difference. First operand 1651 states and 5447 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:01,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:01,555 INFO L93 Difference]: Finished difference Result 1716 states and 5609 transitions. [2022-03-03 19:05:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:05:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:01,558 INFO L225 Difference]: With dead ends: 1716 [2022-03-03 19:05:01,558 INFO L226 Difference]: Without dead ends: 1677 [2022-03-03 19:05:01,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:05:01,558 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:01,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 221 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 495 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-03-03 19:05:01,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-03-03 19:05:01,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1651. [2022-03-03 19:05:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.3) internal successors, (5445), 1650 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5445 transitions. [2022-03-03 19:05:01,576 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5445 transitions. Word has length 24 [2022-03-03 19:05:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:01,577 INFO L470 AbstractCegarLoop]: Abstraction has 1651 states and 5445 transitions. [2022-03-03 19:05:01,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5445 transitions. [2022-03-03 19:05:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:01,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:01,579 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:01,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-03-03 19:05:01,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:01,779 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:01,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1037036391, now seen corresponding path program 174 times [2022-03-03 19:05:01,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:01,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489563091] [2022-03-03 19:05:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:01,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:01,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:01,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489563091] [2022-03-03 19:05:01,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489563091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:01,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822051810] [2022-03-03 19:05:01,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:05:01,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:01,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:01,955 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) [2022-03-03 19:05:01,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-03 19:05:01,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:05:01,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:01,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:01,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:02,045 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 35 [2022-03-03 19:05:02,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:02,275 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 26 treesize of output 22 [2022-03-03 19:05:02,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:02,284 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 15 treesize of output 7 [2022-03-03 19:05:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:02,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:02,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:02,782 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 76 treesize of output 72 [2022-03-03 19:05:02,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:02,885 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2022-03-03 19:05:02,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:02,890 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 69 treesize of output 60 [2022-03-03 19:05:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:03,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822051810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:03,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:03,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:05:03,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47907227] [2022-03-03 19:05:03,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:03,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:05:03,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:05:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:05:03,035 INFO L87 Difference]: Start difference. First operand 1651 states and 5445 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:05:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:03,461 INFO L93 Difference]: Finished difference Result 1748 states and 5714 transitions. [2022-03-03 19:05:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:05:03,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:05:03,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:03,464 INFO L225 Difference]: With dead ends: 1748 [2022-03-03 19:05:03,465 INFO L226 Difference]: Without dead ends: 1689 [2022-03-03 19:05:03,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:05:03,465 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:03,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 248 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 672 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-03-03 19:05:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-03-03 19:05:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1652. [2022-03-03 19:05:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 3.3004239854633557) internal successors, (5449), 1651 states have internal predecessors, (5449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 5449 transitions. [2022-03-03 19:05:03,483 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 5449 transitions. Word has length 24 [2022-03-03 19:05:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:03,483 INFO L470 AbstractCegarLoop]: Abstraction has 1652 states and 5449 transitions. [2022-03-03 19:05:03,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:05:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 5449 transitions. [2022-03-03 19:05:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:03,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:03,485 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:03,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-03 19:05:03,685 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,SelfDestructingSolverStorable189 [2022-03-03 19:05:03,686 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2093997731, now seen corresponding path program 175 times [2022-03-03 19:05:03,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:03,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494836356] [2022-03-03 19:05:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:03,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:03,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:03,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494836356] [2022-03-03 19:05:03,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494836356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:03,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619775651] [2022-03-03 19:05:03,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:05:03,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:03,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:03,845 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) [2022-03-03 19:05:03,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-03 19:05:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:03,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:03,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:03,940 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 35 [2022-03-03 19:05:04,018 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 41 [2022-03-03 19:05:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:04,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:04,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:04,598 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 100 treesize of output 94 [2022-03-03 19:05:04,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:04,815 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 148 treesize of output 128 [2022-03-03 19:05:04,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:04,822 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 100 [2022-03-03 19:05:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:04,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619775651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:04,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:04,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:05:04,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291543309] [2022-03-03 19:05:04,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:04,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:05:04,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:04,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:05:04,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:05:04,957 INFO L87 Difference]: Start difference. First operand 1652 states and 5449 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:05,664 INFO L93 Difference]: Finished difference Result 1909 states and 6152 transitions. [2022-03-03 19:05:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:05:05,664 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:05,668 INFO L225 Difference]: With dead ends: 1909 [2022-03-03 19:05:05,668 INFO L226 Difference]: Without dead ends: 1808 [2022-03-03 19:05:05,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:05:05,668 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:05,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 272 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:05:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2022-03-03 19:05:05,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1664. [2022-03-03 19:05:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 3.30006013229104) internal successors, (5488), 1663 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 5488 transitions. [2022-03-03 19:05:05,688 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 5488 transitions. Word has length 24 [2022-03-03 19:05:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:05,688 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 5488 transitions. [2022-03-03 19:05:05,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 5488 transitions. [2022-03-03 19:05:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:05,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:05,690 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:05,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-03 19:05:05,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-03 19:05:05,891 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1345587235, now seen corresponding path program 176 times [2022-03-03 19:05:05,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:05,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922475385] [2022-03-03 19:05:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:05,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:06,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:06,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922475385] [2022-03-03 19:05:06,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922475385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:06,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606247914] [2022-03-03 19:05:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:05:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:06,074 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) [2022-03-03 19:05:06,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-03 19:05:06,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:05:06,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:06,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:06,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:06,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:06,182 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:05:06,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:06,494 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 21 treesize of output 17 [2022-03-03 19:05:06,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:06,497 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:05:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:06,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:06,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:06,999 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 76 treesize of output 72 [2022-03-03 19:05:07,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:07,104 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2022-03-03 19:05:07,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:07,109 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 69 treesize of output 60 [2022-03-03 19:05:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:07,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606247914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:07,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:07,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:07,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518676062] [2022-03-03 19:05:07,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:07,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:07,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:07,214 INFO L87 Difference]: Start difference. First operand 1664 states and 5488 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:07,664 INFO L93 Difference]: Finished difference Result 1791 states and 5804 transitions. [2022-03-03 19:05:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:05:07,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:07,667 INFO L225 Difference]: With dead ends: 1791 [2022-03-03 19:05:07,667 INFO L226 Difference]: Without dead ends: 1717 [2022-03-03 19:05:07,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:05:07,668 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:07,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 197 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 590 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-03-03 19:05:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-03-03 19:05:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1653. [2022-03-03 19:05:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.3002421307506054) internal successors, (5452), 1652 states have internal predecessors, (5452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5452 transitions. [2022-03-03 19:05:07,686 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5452 transitions. Word has length 24 [2022-03-03 19:05:07,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:07,687 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 5452 transitions. [2022-03-03 19:05:07,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:07,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5452 transitions. [2022-03-03 19:05:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:07,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:07,689 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:07,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-03-03 19:05:07,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:07,891 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:07,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1126356007, now seen corresponding path program 177 times [2022-03-03 19:05:07,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:07,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126673049] [2022-03-03 19:05:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:07,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:08,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:08,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126673049] [2022-03-03 19:05:08,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126673049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:08,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662632924] [2022-03-03 19:05:08,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:05:08,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:08,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:08,064 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) [2022-03-03 19:05:08,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-03 19:05:08,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:05:08,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:08,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:05:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:08,150 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 35 [2022-03-03 19:05:08,309 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 22 [2022-03-03 19:05:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:08,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:09,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:09,005 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 80 treesize of output 76 [2022-03-03 19:05:09,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:09,109 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 116 treesize of output 102 [2022-03-03 19:05:09,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:09,114 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 94 treesize of output 80 [2022-03-03 19:05:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:09,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662632924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:09,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:09,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:05:09,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331974965] [2022-03-03 19:05:09,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:09,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:05:09,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:05:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:05:09,229 INFO L87 Difference]: Start difference. First operand 1653 states and 5452 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:10,899 INFO L93 Difference]: Finished difference Result 2295 states and 7087 transitions. [2022-03-03 19:05:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:05:10,899 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:10,903 INFO L225 Difference]: With dead ends: 2295 [2022-03-03 19:05:10,903 INFO L226 Difference]: Without dead ends: 2115 [2022-03-03 19:05:10,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:05:10,903 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:10,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 336 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:05:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2022-03-03 19:05:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1655. [2022-03-03 19:05:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 3.301088270858525) internal successors, (5460), 1654 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 5460 transitions. [2022-03-03 19:05:10,927 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 5460 transitions. Word has length 24 [2022-03-03 19:05:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:10,927 INFO L470 AbstractCegarLoop]: Abstraction has 1655 states and 5460 transitions. [2022-03-03 19:05:10,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 5460 transitions. [2022-03-03 19:05:10,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:10,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:10,929 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:10,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-03 19:05:11,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:11,130 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1810324647, now seen corresponding path program 178 times [2022-03-03 19:05:11,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:11,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036749810] [2022-03-03 19:05:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:11,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:11,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:11,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036749810] [2022-03-03 19:05:11,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036749810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:11,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428286777] [2022-03-03 19:05:11,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:05:11,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:11,306 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) [2022-03-03 19:05:11,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-03 19:05:11,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:05:11,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:11,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:05:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:11,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:11,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:05:11,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:11,528 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 47 treesize of output 41 [2022-03-03 19:05:11,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:11,531 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 37 treesize of output 21 [2022-03-03 19:05:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:11,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:12,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:12,384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-03 19:05:12,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:12,501 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 97 [2022-03-03 19:05:12,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:12,506 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 77 [2022-03-03 19:05:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:12,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428286777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:12,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:12,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:05:12,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906848102] [2022-03-03 19:05:12,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:12,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:05:12,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:12,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:05:12,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:05:12,603 INFO L87 Difference]: Start difference. First operand 1655 states and 5460 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:05:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:13,447 INFO L93 Difference]: Finished difference Result 2057 states and 6560 transitions. [2022-03-03 19:05:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:05:13,447 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:05:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:13,450 INFO L225 Difference]: With dead ends: 2057 [2022-03-03 19:05:13,450 INFO L226 Difference]: Without dead ends: 1930 [2022-03-03 19:05:13,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:05:13,451 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 127 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:13,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 238 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 676 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2022-03-03 19:05:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-03-03 19:05:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1658. [2022-03-03 19:05:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.301146650573325) internal successors, (5470), 1657 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5470 transitions. [2022-03-03 19:05:13,471 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5470 transitions. Word has length 24 [2022-03-03 19:05:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:13,472 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 5470 transitions. [2022-03-03 19:05:13,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:05:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5470 transitions. [2022-03-03 19:05:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:13,474 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:13,474 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:13,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-03 19:05:13,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:13,674 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash 613904985, now seen corresponding path program 179 times [2022-03-03 19:05:13,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:13,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300851708] [2022-03-03 19:05:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:13,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:13,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:13,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300851708] [2022-03-03 19:05:13,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300851708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:13,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448754243] [2022-03-03 19:05:13,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:05:13,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:13,875 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) [2022-03-03 19:05:13,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-03 19:05:13,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:05:13,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:13,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:13,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:13,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:05:14,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:14,073 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 47 treesize of output 41 [2022-03-03 19:05:14,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:14,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:05:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:14,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:14,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:14,882 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-03-03 19:05:14,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:14,970 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 68 [2022-03-03 19:05:14,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:14,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 52 [2022-03-03 19:05:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:15,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448754243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:15,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:15,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:15,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455460359] [2022-03-03 19:05:15,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:15,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:15,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:15,077 INFO L87 Difference]: Start difference. First operand 1658 states and 5470 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:15,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:15,329 INFO L93 Difference]: Finished difference Result 1761 states and 5739 transitions. [2022-03-03 19:05:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:05:15,329 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:15,332 INFO L225 Difference]: With dead ends: 1761 [2022-03-03 19:05:15,332 INFO L226 Difference]: Without dead ends: 1723 [2022-03-03 19:05:15,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:05:15,333 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:15,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 172 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 580 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-03-03 19:05:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-03-03 19:05:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1658. [2022-03-03 19:05:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.301146650573325) internal successors, (5470), 1657 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5470 transitions. [2022-03-03 19:05:15,351 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5470 transitions. Word has length 24 [2022-03-03 19:05:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:15,352 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 5470 transitions. [2022-03-03 19:05:15,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5470 transitions. [2022-03-03 19:05:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:15,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:15,354 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:15,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-03-03 19:05:15,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-03-03 19:05:15,554 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:15,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1389590713, now seen corresponding path program 180 times [2022-03-03 19:05:15,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:15,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402848667] [2022-03-03 19:05:15,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:15,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:15,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:15,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402848667] [2022-03-03 19:05:15,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402848667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:15,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456376900] [2022-03-03 19:05:15,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:05:15,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:15,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:15,781 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) [2022-03-03 19:05:15,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-03 19:05:15,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:05:15,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:15,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:15,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:15,887 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:05:16,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:16,013 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 42 treesize of output 36 [2022-03-03 19:05:16,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:16,015 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:05:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:16,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:16,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:16,753 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 131 treesize of output 121 [2022-03-03 19:05:16,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:16,948 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 83 treesize of output 74 [2022-03-03 19:05:16,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:16,953 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2022-03-03 19:05:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:17,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456376900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:17,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:17,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:17,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229614351] [2022-03-03 19:05:17,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:17,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:17,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:17,046 INFO L87 Difference]: Start difference. First operand 1658 states and 5470 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:17,484 INFO L93 Difference]: Finished difference Result 1816 states and 5917 transitions. [2022-03-03 19:05:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:05:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:17,487 INFO L225 Difference]: With dead ends: 1816 [2022-03-03 19:05:17,487 INFO L226 Difference]: Without dead ends: 1750 [2022-03-03 19:05:17,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:05:17,487 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:17,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 246 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 637 Invalid, 0 Unknown, 255 Unchecked, 0.3s Time] [2022-03-03 19:05:17,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-03-03 19:05:17,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1663. [2022-03-03 19:05:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.302647412755716) internal successors, (5489), 1662 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5489 transitions. [2022-03-03 19:05:17,506 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5489 transitions. Word has length 24 [2022-03-03 19:05:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:17,506 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 5489 transitions. [2022-03-03 19:05:17,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5489 transitions. [2022-03-03 19:05:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:17,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:17,509 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:17,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-03 19:05:17,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:17,709 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:17,709 INFO L85 PathProgramCache]: Analyzing trace with hash 892311847, now seen corresponding path program 181 times [2022-03-03 19:05:17,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:17,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672322661] [2022-03-03 19:05:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:17,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:17,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:17,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672322661] [2022-03-03 19:05:17,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672322661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:17,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62223287] [2022-03-03 19:05:17,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:05:17,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:17,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:17,905 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) [2022-03-03 19:05:17,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-03 19:05:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:17,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:18,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:18,018 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 [2022-03-03 19:05:18,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:18,159 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 41 treesize of output 35 [2022-03-03 19:05:18,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:18,161 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 37 treesize of output 21 [2022-03-03 19:05:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:18,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:18,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:18,678 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 100 treesize of output 94 [2022-03-03 19:05:18,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:18,865 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 144 treesize of output 124 [2022-03-03 19:05:18,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:18,871 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-03 19:05:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:18,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62223287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:18,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:18,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:18,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010508362] [2022-03-03 19:05:18,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:18,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:18,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:18,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:18,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:18,991 INFO L87 Difference]: Start difference. First operand 1663 states and 5489 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:19,386 INFO L93 Difference]: Finished difference Result 1768 states and 5791 transitions. [2022-03-03 19:05:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:05:19,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:19,389 INFO L225 Difference]: With dead ends: 1768 [2022-03-03 19:05:19,389 INFO L226 Difference]: Without dead ends: 1729 [2022-03-03 19:05:19,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:05:19,389 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:19,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 227 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 605 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-03-03 19:05:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-03-03 19:05:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1664. [2022-03-03 19:05:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 3.302465423932652) internal successors, (5492), 1663 states have internal predecessors, (5492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 5492 transitions. [2022-03-03 19:05:19,408 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 5492 transitions. Word has length 24 [2022-03-03 19:05:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:19,408 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 5492 transitions. [2022-03-03 19:05:19,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 5492 transitions. [2022-03-03 19:05:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:19,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:19,410 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:19,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-03 19:05:19,610 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,SelfDestructingSolverStorable196 [2022-03-03 19:05:19,610 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:19,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:19,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1081039869, now seen corresponding path program 182 times [2022-03-03 19:05:19,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:19,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007513250] [2022-03-03 19:05:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:19,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:19,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:19,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007513250] [2022-03-03 19:05:19,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007513250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:19,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928990949] [2022-03-03 19:05:19,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:05:19,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:19,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:19,837 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) [2022-03-03 19:05:19,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-03 19:05:19,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:05:19,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:19,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:19,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:19,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:19,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:05:19,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:19,995 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 42 treesize of output 36 [2022-03-03 19:05:19,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:19,998 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 37 treesize of output 21 [2022-03-03 19:05:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:20,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:20,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:20,797 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 121 [2022-03-03 19:05:20,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:20,961 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 82 treesize of output 75 [2022-03-03 19:05:20,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:20,965 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 66 treesize of output 59 [2022-03-03 19:05:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:21,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928990949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:21,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:21,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:05:21,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052018747] [2022-03-03 19:05:21,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:21,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:05:21,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:21,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:05:21,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:05:21,074 INFO L87 Difference]: Start difference. First operand 1664 states and 5492 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:05:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:21,707 INFO L93 Difference]: Finished difference Result 1932 states and 6179 transitions. [2022-03-03 19:05:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:05:21,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:05:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:21,710 INFO L225 Difference]: With dead ends: 1932 [2022-03-03 19:05:21,710 INFO L226 Difference]: Without dead ends: 1839 [2022-03-03 19:05:21,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:05:21,711 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:21,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 196 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 483 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-03-03 19:05:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-03-03 19:05:21,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1667. [2022-03-03 19:05:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.302521008403361) internal successors, (5502), 1666 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5502 transitions. [2022-03-03 19:05:21,730 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5502 transitions. Word has length 24 [2022-03-03 19:05:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:21,730 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 5502 transitions. [2022-03-03 19:05:21,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:05:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5502 transitions. [2022-03-03 19:05:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:21,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:21,732 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:21,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-03-03 19:05:21,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:21,933 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:21,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1653964633, now seen corresponding path program 183 times [2022-03-03 19:05:21,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:21,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125951280] [2022-03-03 19:05:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:21,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:22,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:22,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125951280] [2022-03-03 19:05:22,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125951280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:22,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080322579] [2022-03-03 19:05:22,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:05:22,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:22,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:22,178 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) [2022-03-03 19:05:22,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-03 19:05:22,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:05:22,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:22,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:22,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:22,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:22,292 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 [2022-03-03 19:05:22,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:22,343 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-03 19:05:22,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:22,346 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:05:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:22,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:22,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:22,960 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 101 treesize of output 95 [2022-03-03 19:05:23,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:23,152 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 144 treesize of output 124 [2022-03-03 19:05:23,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:23,158 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 116 treesize of output 96 [2022-03-03 19:05:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:23,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080322579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:23,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:23,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:23,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803015003] [2022-03-03 19:05:23,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:23,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:23,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:23,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:23,287 INFO L87 Difference]: Start difference. First operand 1667 states and 5502 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:23,600 INFO L93 Difference]: Finished difference Result 1832 states and 5967 transitions. [2022-03-03 19:05:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:05:23,600 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:23,603 INFO L225 Difference]: With dead ends: 1832 [2022-03-03 19:05:23,603 INFO L226 Difference]: Without dead ends: 1766 [2022-03-03 19:05:23,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:05:23,603 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:23,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 186 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 601 Invalid, 0 Unknown, 180 Unchecked, 0.2s Time] [2022-03-03 19:05:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2022-03-03 19:05:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1664. [2022-03-03 19:05:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 3.302465423932652) internal successors, (5492), 1663 states have internal predecessors, (5492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 5492 transitions. [2022-03-03 19:05:23,622 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 5492 transitions. Word has length 24 [2022-03-03 19:05:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:23,622 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 5492 transitions. [2022-03-03 19:05:23,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 5492 transitions. [2022-03-03 19:05:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:23,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:23,624 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:23,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-03 19:05:23,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:23,825 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:23,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1180960483, now seen corresponding path program 184 times [2022-03-03 19:05:23,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:23,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595365825] [2022-03-03 19:05:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:23,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:24,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:24,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595365825] [2022-03-03 19:05:24,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595365825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:24,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040582170] [2022-03-03 19:05:24,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:05:24,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:24,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:24,070 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) [2022-03-03 19:05:24,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-03 19:05:24,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:05:24,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:24,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:24,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:24,185 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:05:24,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:24,336 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 55 treesize of output 47 [2022-03-03 19:05:24,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:24,338 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 37 treesize of output 21 [2022-03-03 19:05:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:24,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:24,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:24,867 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 103 treesize of output 97 [2022-03-03 19:05:25,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:25,050 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-03-03 19:05:25,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:25,056 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 118 treesize of output 98 [2022-03-03 19:05:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:25,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040582170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:25,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:25,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:25,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019085421] [2022-03-03 19:05:25,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:25,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:25,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:25,157 INFO L87 Difference]: Start difference. First operand 1664 states and 5492 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:25,626 INFO L93 Difference]: Finished difference Result 1768 states and 5787 transitions. [2022-03-03 19:05:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:05:25,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:25,629 INFO L225 Difference]: With dead ends: 1768 [2022-03-03 19:05:25,629 INFO L226 Difference]: Without dead ends: 1729 [2022-03-03 19:05:25,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:05:25,629 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:25,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 323 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 825 Invalid, 0 Unknown, 248 Unchecked, 0.3s Time] [2022-03-03 19:05:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-03-03 19:05:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1666. [2022-03-03 19:05:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.3015015015015017) internal successors, (5497), 1665 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5497 transitions. [2022-03-03 19:05:25,655 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5497 transitions. Word has length 24 [2022-03-03 19:05:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:25,655 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 5497 transitions. [2022-03-03 19:05:25,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5497 transitions. [2022-03-03 19:05:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:25,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:25,657 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:25,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-03 19:05:25,858 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,SelfDestructingSolverStorable199 [2022-03-03 19:05:25,858 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:25,859 INFO L85 PathProgramCache]: Analyzing trace with hash 82535079, now seen corresponding path program 185 times [2022-03-03 19:05:25,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:25,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684755982] [2022-03-03 19:05:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:26,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:26,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684755982] [2022-03-03 19:05:26,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684755982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:26,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313605475] [2022-03-03 19:05:26,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:05:26,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:26,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:26,055 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) [2022-03-03 19:05:26,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-03 19:05:26,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:05:26,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:26,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:26,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:26,158 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:05:26,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:26,237 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 51 treesize of output 43 [2022-03-03 19:05:26,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:26,239 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 53 treesize of output 33 [2022-03-03 19:05:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:26,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:26,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:26,776 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 129 treesize of output 119 [2022-03-03 19:05:26,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:26,933 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 76 treesize of output 69 [2022-03-03 19:05:26,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:26,938 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 60 treesize of output 53 [2022-03-03 19:05:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:27,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313605475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:27,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:27,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:27,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705241135] [2022-03-03 19:05:27,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:27,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:27,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:27,050 INFO L87 Difference]: Start difference. First operand 1666 states and 5497 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:27,942 INFO L93 Difference]: Finished difference Result 1820 states and 5865 transitions. [2022-03-03 19:05:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:05:27,943 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:27,946 INFO L225 Difference]: With dead ends: 1820 [2022-03-03 19:05:27,946 INFO L226 Difference]: Without dead ends: 1746 [2022-03-03 19:05:27,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:05:27,946 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:27,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 298 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 845 Invalid, 0 Unknown, 292 Unchecked, 0.3s Time] [2022-03-03 19:05:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-03-03 19:05:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1663. [2022-03-03 19:05:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.3014440433212995) internal successors, (5487), 1662 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5487 transitions. [2022-03-03 19:05:27,966 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5487 transitions. Word has length 24 [2022-03-03 19:05:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:27,966 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 5487 transitions. [2022-03-03 19:05:27,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5487 transitions. [2022-03-03 19:05:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:27,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:27,968 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:27,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-03 19:05:28,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-03 19:05:28,169 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash 299283367, now seen corresponding path program 186 times [2022-03-03 19:05:28,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:28,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796684426] [2022-03-03 19:05:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:28,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:28,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796684426] [2022-03-03 19:05:28,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796684426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:28,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957951187] [2022-03-03 19:05:28,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:05:28,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:28,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:28,313 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) [2022-03-03 19:05:28,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-03 19:05:28,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:05:28,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:28,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:28,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:28,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:28,420 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:05:28,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:28,499 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 51 treesize of output 43 [2022-03-03 19:05:28,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:28,501 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 53 treesize of output 33 [2022-03-03 19:05:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:28,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:29,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:29,045 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 129 treesize of output 119 [2022-03-03 19:05:29,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:29,205 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 76 treesize of output 69 [2022-03-03 19:05:29,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:29,210 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 60 treesize of output 53 [2022-03-03 19:05:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:29,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957951187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:29,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:29,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:29,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596946644] [2022-03-03 19:05:29,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:29,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:29,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:29,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:29,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:29,314 INFO L87 Difference]: Start difference. First operand 1663 states and 5487 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:29,579 INFO L93 Difference]: Finished difference Result 1730 states and 5672 transitions. [2022-03-03 19:05:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:05:29,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:29,582 INFO L225 Difference]: With dead ends: 1730 [2022-03-03 19:05:29,582 INFO L226 Difference]: Without dead ends: 1711 [2022-03-03 19:05:29,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:29,582 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:29,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 220 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 660 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-03-03 19:05:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2022-03-03 19:05:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1663. [2022-03-03 19:05:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.3014440433212995) internal successors, (5487), 1662 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5487 transitions. [2022-03-03 19:05:29,602 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5487 transitions. Word has length 24 [2022-03-03 19:05:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:29,602 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 5487 transitions. [2022-03-03 19:05:29,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5487 transitions. [2022-03-03 19:05:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:29,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:29,605 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:29,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-03 19:05:29,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:29,805 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:29,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:29,805 INFO L85 PathProgramCache]: Analyzing trace with hash 715638361, now seen corresponding path program 187 times [2022-03-03 19:05:29,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:29,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799944909] [2022-03-03 19:05:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:29,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:29,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:29,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799944909] [2022-03-03 19:05:29,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799944909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:29,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217742758] [2022-03-03 19:05:29,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:05:29,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:29,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:29,950 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) [2022-03-03 19:05:29,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-03 19:05:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:29,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:05:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:30,028 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 35 [2022-03-03 19:05:30,182 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 [2022-03-03 19:05:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:30,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:30,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:30,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-03-03 19:05:30,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:30,874 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 54 treesize of output 52 [2022-03-03 19:05:30,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:30,877 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 44 treesize of output 42 [2022-03-03 19:05:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:30,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217742758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:30,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:30,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:05:30,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2335290] [2022-03-03 19:05:30,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:30,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:05:30,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:05:30,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:05:30,911 INFO L87 Difference]: Start difference. First operand 1663 states and 5487 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:05:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:31,657 INFO L93 Difference]: Finished difference Result 1870 states and 6056 transitions. [2022-03-03 19:05:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:05:31,658 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 24 [2022-03-03 19:05:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:31,661 INFO L225 Difference]: With dead ends: 1870 [2022-03-03 19:05:31,661 INFO L226 Difference]: Without dead ends: 1780 [2022-03-03 19:05:31,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:05:31,661 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:31,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 268 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:05:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-03-03 19:05:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1673. [2022-03-03 19:05:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.3038277511961724) internal successors, (5524), 1672 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5524 transitions. [2022-03-03 19:05:31,680 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5524 transitions. Word has length 24 [2022-03-03 19:05:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:31,680 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 5524 transitions. [2022-03-03 19:05:31,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:05:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5524 transitions. [2022-03-03 19:05:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:31,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:31,682 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:31,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-03 19:05:31,883 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,SelfDestructingSolverStorable202 [2022-03-03 19:05:31,883 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:31,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1879571535, now seen corresponding path program 188 times [2022-03-03 19:05:31,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:31,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78081351] [2022-03-03 19:05:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:32,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:32,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78081351] [2022-03-03 19:05:32,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78081351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:32,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455047736] [2022-03-03 19:05:32,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:05:32,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:32,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:32,051 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) [2022-03-03 19:05:32,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-03 19:05:32,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:05:32,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:32,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:32,146 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 35 [2022-03-03 19:05:32,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:32,317 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-03-03 19:05:32,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:32,319 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 34 treesize of output 17 [2022-03-03 19:05:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:32,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:33,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:33,015 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 79 treesize of output 70 [2022-03-03 19:05:33,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:33,096 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-03 19:05:33,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:33,100 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 30 [2022-03-03 19:05:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:33,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455047736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:33,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:33,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:05:33,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435010735] [2022-03-03 19:05:33,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:33,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:05:33,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:05:33,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:05:33,156 INFO L87 Difference]: Start difference. First operand 1673 states and 5524 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:05:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:34,141 INFO L93 Difference]: Finished difference Result 2134 states and 6706 transitions. [2022-03-03 19:05:34,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:05:34,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:05:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:34,145 INFO L225 Difference]: With dead ends: 2134 [2022-03-03 19:05:34,145 INFO L226 Difference]: Without dead ends: 1984 [2022-03-03 19:05:34,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:05:34,145 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 159 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:34,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 388 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1106 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-03-03 19:05:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-03-03 19:05:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1679. [2022-03-03 19:05:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.3051251489868894) internal successors, (5546), 1678 states have internal predecessors, (5546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5546 transitions. [2022-03-03 19:05:34,167 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5546 transitions. Word has length 24 [2022-03-03 19:05:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:34,167 INFO L470 AbstractCegarLoop]: Abstraction has 1679 states and 5546 transitions. [2022-03-03 19:05:34,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:05:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5546 transitions. [2022-03-03 19:05:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:34,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:34,169 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:34,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-03-03 19:05:34,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:34,370 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:34,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:34,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1046066827, now seen corresponding path program 189 times [2022-03-03 19:05:34,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:34,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001024383] [2022-03-03 19:05:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:34,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:34,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:34,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001024383] [2022-03-03 19:05:34,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001024383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:34,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42377252] [2022-03-03 19:05:34,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:05:34,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:34,538 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) [2022-03-03 19:05:34,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-03 19:05:34,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:05:34,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:34,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:34,635 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 35 [2022-03-03 19:05:34,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:34,802 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:05:34,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:34,804 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 25 treesize of output 12 [2022-03-03 19:05:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:34,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:35,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:35,415 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:05:35,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:35,626 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 34 treesize of output 36 [2022-03-03 19:05:35,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:35,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 30 [2022-03-03 19:05:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:35,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42377252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:35,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:35,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:05:35,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002256166] [2022-03-03 19:05:35,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:35,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:05:35,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:05:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:05:35,673 INFO L87 Difference]: Start difference. First operand 1679 states and 5546 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-03-03 19:05:35,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:35,904 INFO L93 Difference]: Finished difference Result 1782 states and 5835 transitions. [2022-03-03 19:05:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:05:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 24 [2022-03-03 19:05:35,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:35,916 INFO L225 Difference]: With dead ends: 1782 [2022-03-03 19:05:35,916 INFO L226 Difference]: Without dead ends: 1751 [2022-03-03 19:05:35,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:05:35,917 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:35,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 199 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 560 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-03-03 19:05:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-03-03 19:05:35,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1688. [2022-03-03 19:05:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.3040901007705985) internal successors, (5574), 1687 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5574 transitions. [2022-03-03 19:05:35,935 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5574 transitions. Word has length 24 [2022-03-03 19:05:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:35,936 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5574 transitions. [2022-03-03 19:05:35,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-03-03 19:05:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5574 transitions. [2022-03-03 19:05:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:35,938 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:35,938 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:35,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-03-03 19:05:36,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-03 19:05:36,138 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:36,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1442654375, now seen corresponding path program 190 times [2022-03-03 19:05:36,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:36,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772704203] [2022-03-03 19:05:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:36,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:36,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:36,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772704203] [2022-03-03 19:05:36,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772704203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:36,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965914801] [2022-03-03 19:05:36,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:05:36,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:36,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:36,312 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) [2022-03-03 19:05:36,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-03 19:05:36,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:05:36,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:36,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:05:36,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:36,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:36,424 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 [2022-03-03 19:05:36,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:36,870 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 29 treesize of output 23 [2022-03-03 19:05:36,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:36,873 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-03 19:05:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:36,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:37,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:37,435 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 111 treesize of output 97 [2022-03-03 19:05:37,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:37,636 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 54 treesize of output 52 [2022-03-03 19:05:37,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:37,640 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 44 treesize of output 42 [2022-03-03 19:05:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:37,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965914801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:37,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:37,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:37,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490618513] [2022-03-03 19:05:37,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:37,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:37,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:37,677 INFO L87 Difference]: Start difference. First operand 1688 states and 5574 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:37,966 INFO L93 Difference]: Finished difference Result 1764 states and 5761 transitions. [2022-03-03 19:05:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:05:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:37,970 INFO L225 Difference]: With dead ends: 1764 [2022-03-03 19:05:37,970 INFO L226 Difference]: Without dead ends: 1715 [2022-03-03 19:05:37,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:05:37,970 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:37,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 238 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 638 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-03-03 19:05:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-03-03 19:05:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1688. [2022-03-03 19:05:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.3017190278601065) internal successors, (5570), 1687 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5570 transitions. [2022-03-03 19:05:37,988 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5570 transitions. Word has length 24 [2022-03-03 19:05:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:37,988 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5570 transitions. [2022-03-03 19:05:37,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5570 transitions. [2022-03-03 19:05:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:37,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:37,990 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:38,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-03 19:05:38,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:38,191 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash -520952235, now seen corresponding path program 191 times [2022-03-03 19:05:38,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:38,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861412543] [2022-03-03 19:05:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:38,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:38,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:38,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861412543] [2022-03-03 19:05:38,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861412543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:38,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471864676] [2022-03-03 19:05:38,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:05:38,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:38,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:38,344 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) [2022-03-03 19:05:38,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-03 19:05:38,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:05:38,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:38,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:38,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:38,427 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 35 [2022-03-03 19:05:38,522 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 [2022-03-03 19:05:38,523 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 [2022-03-03 19:05:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:38,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:39,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:39,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 74 [2022-03-03 19:05:39,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:39,174 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 34 treesize of output 36 [2022-03-03 19:05:39,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:39,177 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 28 treesize of output 30 [2022-03-03 19:05:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:39,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471864676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:39,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:39,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:05:39,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693850040] [2022-03-03 19:05:39,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:39,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:05:39,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:05:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:05:39,216 INFO L87 Difference]: Start difference. First operand 1688 states and 5570 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:39,795 INFO L93 Difference]: Finished difference Result 1806 states and 5908 transitions. [2022-03-03 19:05:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:05:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:39,798 INFO L225 Difference]: With dead ends: 1806 [2022-03-03 19:05:39,798 INFO L226 Difference]: Without dead ends: 1791 [2022-03-03 19:05:39,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:05:39,798 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:39,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 228 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 751 Invalid, 0 Unknown, 144 Unchecked, 0.3s Time] [2022-03-03 19:05:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-03-03 19:05:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1680. [2022-03-03 19:05:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.303752233472305) internal successors, (5547), 1679 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5547 transitions. [2022-03-03 19:05:39,818 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5547 transitions. Word has length 24 [2022-03-03 19:05:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:39,818 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 5547 transitions. [2022-03-03 19:05:39,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5547 transitions. [2022-03-03 19:05:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:39,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:39,820 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:39,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-03 19:05:40,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:40,021 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash 804957977, now seen corresponding path program 192 times [2022-03-03 19:05:40,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:40,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507281907] [2022-03-03 19:05:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:40,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:40,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507281907] [2022-03-03 19:05:40,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507281907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:40,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831037881] [2022-03-03 19:05:40,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:05:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:40,177 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) [2022-03-03 19:05:40,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-03 19:05:40,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:05:40,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:40,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:05:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:40,254 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 35 [2022-03-03 19:05:40,415 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 22 [2022-03-03 19:05:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:40,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:41,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:41,125 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 110 treesize of output 98 [2022-03-03 19:05:41,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:41,248 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 56 treesize of output 54 [2022-03-03 19:05:41,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:41,251 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 46 treesize of output 44 [2022-03-03 19:05:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:41,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831037881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:41,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:41,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:05:41,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614011369] [2022-03-03 19:05:41,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:41,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:05:41,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:41,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:05:41,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:05:41,287 INFO L87 Difference]: Start difference. First operand 1680 states and 5547 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:05:42,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:42,431 INFO L93 Difference]: Finished difference Result 2256 states and 7041 transitions. [2022-03-03 19:05:42,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:05:42,431 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 24 [2022-03-03 19:05:42,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:42,435 INFO L225 Difference]: With dead ends: 2256 [2022-03-03 19:05:42,435 INFO L226 Difference]: Without dead ends: 2080 [2022-03-03 19:05:42,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:05:42,436 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 148 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:42,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 395 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:05:42,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2022-03-03 19:05:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1687. [2022-03-03 19:05:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.3072360616844603) internal successors, (5576), 1686 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5576 transitions. [2022-03-03 19:05:42,457 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5576 transitions. Word has length 24 [2022-03-03 19:05:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:42,457 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 5576 transitions. [2022-03-03 19:05:42,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:05:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5576 transitions. [2022-03-03 19:05:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:42,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:42,459 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:42,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-03 19:05:42,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:42,660 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2131722677, now seen corresponding path program 193 times [2022-03-03 19:05:42,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:42,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427681217] [2022-03-03 19:05:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:42,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:42,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:42,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427681217] [2022-03-03 19:05:42,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427681217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:42,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705783821] [2022-03-03 19:05:42,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:05:42,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:42,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:42,877 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) [2022-03-03 19:05:42,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-03 19:05:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:05:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:42,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:42,988 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:05:43,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:43,136 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 47 treesize of output 41 [2022-03-03 19:05:43,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:43,139 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 37 treesize of output 21 [2022-03-03 19:05:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:43,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:43,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:43,976 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 110 treesize of output 98 [2022-03-03 19:05:44,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:44,108 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-03 19:05:44,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:44,112 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-03 19:05:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:44,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705783821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:44,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:44,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:44,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110960774] [2022-03-03 19:05:44,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:44,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:44,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:44,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:44,149 INFO L87 Difference]: Start difference. First operand 1687 states and 5576 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:46,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:46,486 INFO L93 Difference]: Finished difference Result 2478 states and 7571 transitions. [2022-03-03 19:05:46,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:05:46,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:46,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:46,490 INFO L225 Difference]: With dead ends: 2478 [2022-03-03 19:05:46,490 INFO L226 Difference]: Without dead ends: 2274 [2022-03-03 19:05:46,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:05:46,491 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 272 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:46,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 404 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1214 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2022-03-03 19:05:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2022-03-03 19:05:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1695. [2022-03-03 19:05:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.312868949232586) internal successors, (5612), 1694 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5612 transitions. [2022-03-03 19:05:46,517 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5612 transitions. Word has length 24 [2022-03-03 19:05:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:46,517 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 5612 transitions. [2022-03-03 19:05:46,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5612 transitions. [2022-03-03 19:05:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:46,519 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:46,519 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:46,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-03 19:05:46,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-03-03 19:05:46,720 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:46,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1626265269, now seen corresponding path program 194 times [2022-03-03 19:05:46,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:46,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204004906] [2022-03-03 19:05:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:46,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:46,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:46,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204004906] [2022-03-03 19:05:46,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204004906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:46,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990227658] [2022-03-03 19:05:46,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:05:46,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:46,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:46,942 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) [2022-03-03 19:05:46,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-03 19:05:46,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:05:46,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:46,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:46,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:47,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:47,059 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 [2022-03-03 19:05:47,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:47,199 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 47 treesize of output 41 [2022-03-03 19:05:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:47,202 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 37 treesize of output 21 [2022-03-03 19:05:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:47,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:48,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:48,031 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 80 treesize of output 73 [2022-03-03 19:05:48,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:48,161 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 34 treesize of output 36 [2022-03-03 19:05:48,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:48,164 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 28 treesize of output 30 [2022-03-03 19:05:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:48,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990227658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:48,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:48,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:48,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862154438] [2022-03-03 19:05:48,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:48,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:48,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:48,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:48,208 INFO L87 Difference]: Start difference. First operand 1695 states and 5612 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:48,459 INFO L93 Difference]: Finished difference Result 1814 states and 5921 transitions. [2022-03-03 19:05:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:05:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:48,462 INFO L225 Difference]: With dead ends: 1814 [2022-03-03 19:05:48,462 INFO L226 Difference]: Without dead ends: 1752 [2022-03-03 19:05:48,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:05:48,463 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:48,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 175 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 493 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-03-03 19:05:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-03-03 19:05:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1693. [2022-03-03 19:05:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.3138297872340425) internal successors, (5607), 1692 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5607 transitions. [2022-03-03 19:05:48,482 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5607 transitions. Word has length 24 [2022-03-03 19:05:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:48,482 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 5607 transitions. [2022-03-03 19:05:48,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5607 transitions. [2022-03-03 19:05:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:48,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:48,485 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:48,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-03 19:05:48,685 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,SelfDestructingSolverStorable209 [2022-03-03 19:05:48,685 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1324378425, now seen corresponding path program 195 times [2022-03-03 19:05:48,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:48,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556589961] [2022-03-03 19:05:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:48,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:48,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:48,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556589961] [2022-03-03 19:05:48,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556589961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:48,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123184476] [2022-03-03 19:05:48,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:05:48,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:48,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:48,868 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) [2022-03-03 19:05:48,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-03 19:05:48,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:05:48,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:48,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:49,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:49,014 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 [2022-03-03 19:05:49,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:49,063 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 23 treesize of output 19 [2022-03-03 19:05:49,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:49,066 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 12 treesize of output 3 [2022-03-03 19:05:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:49,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:49,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:49,726 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 72 treesize of output 65 [2022-03-03 19:05:49,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:49,864 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-03 19:05:49,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:49,867 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 28 treesize of output 30 [2022-03-03 19:05:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:49,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123184476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:49,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:49,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:49,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179986346] [2022-03-03 19:05:49,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:49,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:49,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:49,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:49,925 INFO L87 Difference]: Start difference. First operand 1693 states and 5607 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:50,680 INFO L93 Difference]: Finished difference Result 1855 states and 6055 transitions. [2022-03-03 19:05:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:05:50,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:50,683 INFO L225 Difference]: With dead ends: 1855 [2022-03-03 19:05:50,683 INFO L226 Difference]: Without dead ends: 1770 [2022-03-03 19:05:50,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:05:50,683 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 104 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:50,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 199 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 548 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-03-03 19:05:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-03-03 19:05:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1694. [2022-03-03 19:05:50,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 3.3118724158298876) internal successors, (5607), 1693 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5607 transitions. [2022-03-03 19:05:50,703 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5607 transitions. Word has length 24 [2022-03-03 19:05:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:50,703 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 5607 transitions. [2022-03-03 19:05:50,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5607 transitions. [2022-03-03 19:05:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:50,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:50,705 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:50,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-03 19:05:50,905 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,SelfDestructingSolverStorable210 [2022-03-03 19:05:50,906 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash 916800473, now seen corresponding path program 196 times [2022-03-03 19:05:50,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:50,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43350708] [2022-03-03 19:05:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:50,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:51,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:51,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43350708] [2022-03-03 19:05:51,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43350708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:51,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340493555] [2022-03-03 19:05:51,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:05:51,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:51,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:51,053 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) [2022-03-03 19:05:51,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-03 19:05:51,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:05:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:51,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:05:51,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:51,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:51,211 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 [2022-03-03 19:05:51,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:51,433 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 29 treesize of output 23 [2022-03-03 19:05:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:51,435 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-03 19:05:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:51,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:51,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:51,842 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 111 treesize of output 97 [2022-03-03 19:05:52,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:52,054 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 46 treesize of output 46 [2022-03-03 19:05:52,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:52,058 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-03 19:05:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:52,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340493555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:52,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:52,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:52,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068679389] [2022-03-03 19:05:52,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:52,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:52,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:52,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:52,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:52,098 INFO L87 Difference]: Start difference. First operand 1694 states and 5607 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:52,361 INFO L93 Difference]: Finished difference Result 1778 states and 5805 transitions. [2022-03-03 19:05:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:05:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:52,365 INFO L225 Difference]: With dead ends: 1778 [2022-03-03 19:05:52,365 INFO L226 Difference]: Without dead ends: 1723 [2022-03-03 19:05:52,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:05:52,365 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:52,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 195 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 557 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-03-03 19:05:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-03-03 19:05:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1694. [2022-03-03 19:05:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 3.3112817483756647) internal successors, (5606), 1693 states have internal predecessors, (5606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5606 transitions. [2022-03-03 19:05:52,384 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5606 transitions. Word has length 24 [2022-03-03 19:05:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:52,384 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 5606 transitions. [2022-03-03 19:05:52,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5606 transitions. [2022-03-03 19:05:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:52,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:52,386 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:52,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-03 19:05:52,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:52,586 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:52,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:52,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1838502613, now seen corresponding path program 197 times [2022-03-03 19:05:52,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:52,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113618164] [2022-03-03 19:05:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:52,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:52,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:52,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113618164] [2022-03-03 19:05:52,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113618164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:52,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556958990] [2022-03-03 19:05:52,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:05:52,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:52,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:52,722 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) [2022-03-03 19:05:52,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-03 19:05:52,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:05:52,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:52,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:52,823 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 [2022-03-03 19:05:52,907 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 [2022-03-03 19:05:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:52,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:53,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:53,327 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-03-03 19:05:53,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:53,449 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-03 19:05:53,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:53,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 30 [2022-03-03 19:05:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:05:53,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556958990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:53,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:53,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:05:53,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702883286] [2022-03-03 19:05:53,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:53,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:05:53,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:53,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:05:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:05:53,495 INFO L87 Difference]: Start difference. First operand 1694 states and 5606 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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) [2022-03-03 19:05:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:53,864 INFO L93 Difference]: Finished difference Result 1777 states and 5804 transitions. [2022-03-03 19:05:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:05:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 24 [2022-03-03 19:05:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:53,867 INFO L225 Difference]: With dead ends: 1777 [2022-03-03 19:05:53,867 INFO L226 Difference]: Without dead ends: 1726 [2022-03-03 19:05:53,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:05:53,868 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:53,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 187 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:05:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2022-03-03 19:05:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1687. [2022-03-03 19:05:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.3096085409252667) internal successors, (5580), 1686 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5580 transitions. [2022-03-03 19:05:53,886 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5580 transitions. Word has length 24 [2022-03-03 19:05:53,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:53,886 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 5580 transitions. [2022-03-03 19:05:53,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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) [2022-03-03 19:05:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5580 transitions. [2022-03-03 19:05:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:53,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:53,889 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:53,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-03 19:05:54,089 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,SelfDestructingSolverStorable212 [2022-03-03 19:05:54,089 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -415402801, now seen corresponding path program 198 times [2022-03-03 19:05:54,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:54,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242766073] [2022-03-03 19:05:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:54,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:54,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242766073] [2022-03-03 19:05:54,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242766073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:54,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836262194] [2022-03-03 19:05:54,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:05:54,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:54,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:54,233 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) [2022-03-03 19:05:54,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-03 19:05:54,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:05:54,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:54,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:54,349 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 19 treesize of output 15 [2022-03-03 19:05:54,370 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 23 treesize of output 19 [2022-03-03 19:05:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:54,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:54,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:54,780 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 80 treesize of output 73 [2022-03-03 19:05:54,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:54,944 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 34 treesize of output 36 [2022-03-03 19:05:54,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:54,948 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 28 treesize of output 30 [2022-03-03 19:05:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:54,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836262194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:54,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:54,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:05:54,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275337379] [2022-03-03 19:05:54,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:54,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:05:54,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:54,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:05:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:05:54,990 INFO L87 Difference]: Start difference. First operand 1687 states and 5580 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:05:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:55,348 INFO L93 Difference]: Finished difference Result 1832 states and 6029 transitions. [2022-03-03 19:05:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:05:55,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 24 [2022-03-03 19:05:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:55,351 INFO L225 Difference]: With dead ends: 1832 [2022-03-03 19:05:55,351 INFO L226 Difference]: Without dead ends: 1786 [2022-03-03 19:05:55,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:05:55,352 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:55,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 157 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:05:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2022-03-03 19:05:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1687. [2022-03-03 19:05:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.3096085409252667) internal successors, (5580), 1686 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5580 transitions. [2022-03-03 19:05:55,370 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5580 transitions. Word has length 24 [2022-03-03 19:05:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:55,371 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 5580 transitions. [2022-03-03 19:05:55,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:05:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5580 transitions. [2022-03-03 19:05:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:55,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:55,373 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:55,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-03 19:05:55,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-03 19:05:55,573 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:55,573 INFO L85 PathProgramCache]: Analyzing trace with hash -997163581, now seen corresponding path program 199 times [2022-03-03 19:05:55,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:55,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584546103] [2022-03-03 19:05:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:55,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:55,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:55,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584546103] [2022-03-03 19:05:55,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584546103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:55,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706714836] [2022-03-03 19:05:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:05:55,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:55,794 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) [2022-03-03 19:05:55,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-03 19:05:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:05:55,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:55,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:55,908 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 [2022-03-03 19:05:55,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:55,972 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 43 treesize of output 37 [2022-03-03 19:05:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:55,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:05:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:56,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:05:56,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:56,809 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 110 treesize of output 98 [2022-03-03 19:05:56,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:56,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 52 [2022-03-03 19:05:56,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:05:56,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:05:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:57,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706714836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:05:57,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:05:57,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:05:57,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521392523] [2022-03-03 19:05:57,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:05:57,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:05:57,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:05:57,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:05:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:05:57,019 INFO L87 Difference]: Start difference. First operand 1687 states and 5580 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:05:58,779 INFO L93 Difference]: Finished difference Result 2323 states and 7182 transitions. [2022-03-03 19:05:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:05:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:05:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:05:58,783 INFO L225 Difference]: With dead ends: 2323 [2022-03-03 19:05:58,783 INFO L226 Difference]: Without dead ends: 2119 [2022-03-03 19:05:58,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:05:58,784 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 228 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:05:58,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 450 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1165 Invalid, 0 Unknown, 165 Unchecked, 0.5s Time] [2022-03-03 19:05:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2022-03-03 19:05:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1688. [2022-03-03 19:05:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.3100177830468285) internal successors, (5584), 1687 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5584 transitions. [2022-03-03 19:05:58,806 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5584 transitions. Word has length 24 [2022-03-03 19:05:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:05:58,806 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5584 transitions. [2022-03-03 19:05:58,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:05:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5584 transitions. [2022-03-03 19:05:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:05:58,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:05:58,808 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:05:58,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-03 19:05:59,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:59,008 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:05:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:05:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1112684295, now seen corresponding path program 200 times [2022-03-03 19:05:59,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:05:59,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121746379] [2022-03-03 19:05:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:05:59,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:05:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:05:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:59,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:05:59,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121746379] [2022-03-03 19:05:59,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121746379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:05:59,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979193013] [2022-03-03 19:05:59,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:05:59,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:05:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:05:59,214 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) [2022-03-03 19:05:59,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-03 19:05:59,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:05:59,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:05:59,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:05:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:05:59,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:59,327 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 41 treesize of output 35 [2022-03-03 19:05:59,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:59,420 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:05:59,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:05:59,423 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 12 treesize of output 3 [2022-03-03 19:05:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:05:59,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:00,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:00,190 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 143 treesize of output 123 [2022-03-03 19:06:00,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:00,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-03 19:06:00,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:00,338 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 30 [2022-03-03 19:06:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:00,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979193013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:00,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:00,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:00,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753761487] [2022-03-03 19:06:00,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:00,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:00,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:00,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:00,387 INFO L87 Difference]: Start difference. First operand 1688 states and 5584 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:00,604 INFO L93 Difference]: Finished difference Result 1766 states and 5820 transitions. [2022-03-03 19:06:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:06:00,604 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:00,607 INFO L225 Difference]: With dead ends: 1766 [2022-03-03 19:06:00,607 INFO L226 Difference]: Without dead ends: 1735 [2022-03-03 19:06:00,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:06:00,607 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:00,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 156 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 491 Invalid, 0 Unknown, 146 Unchecked, 0.2s Time] [2022-03-03 19:06:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2022-03-03 19:06:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1695. [2022-03-03 19:06:00,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.312868949232586) internal successors, (5612), 1694 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5612 transitions. [2022-03-03 19:06:00,634 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5612 transitions. Word has length 24 [2022-03-03 19:06:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:00,634 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 5612 transitions. [2022-03-03 19:06:00,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5612 transitions. [2022-03-03 19:06:00,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:00,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:00,636 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:00,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-03 19:06:00,837 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,SelfDestructingSolverStorable215 [2022-03-03 19:06:00,837 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:00,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1633718827, now seen corresponding path program 201 times [2022-03-03 19:06:00,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:00,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301620825] [2022-03-03 19:06:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:00,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:01,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:01,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301620825] [2022-03-03 19:06:01,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301620825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:01,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125075521] [2022-03-03 19:06:01,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:06:01,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:01,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:01,023 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) [2022-03-03 19:06:01,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-03 19:06:01,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:06:01,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:01,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:01,129 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 41 treesize of output 35 [2022-03-03 19:06:01,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:01,278 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 21 treesize of output 17 [2022-03-03 19:06:01,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:01,281 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 11 treesize of output 7 [2022-03-03 19:06:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:01,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:01,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:01,860 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 83 treesize of output 74 [2022-03-03 19:06:01,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:01,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-03 19:06:01,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:01,949 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-03 19:06:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:01,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125075521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:01,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:01,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:01,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115564819] [2022-03-03 19:06:01,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:01,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:01,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:01,994 INFO L87 Difference]: Start difference. First operand 1695 states and 5612 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:02,254 INFO L93 Difference]: Finished difference Result 1780 states and 5842 transitions. [2022-03-03 19:06:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:06:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:02,257 INFO L225 Difference]: With dead ends: 1780 [2022-03-03 19:06:02,258 INFO L226 Difference]: Without dead ends: 1749 [2022-03-03 19:06:02,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:06:02,258 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:02,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 216 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 433 Invalid, 0 Unknown, 232 Unchecked, 0.2s Time] [2022-03-03 19:06:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-03-03 19:06:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1709. [2022-03-03 19:06:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.306791569086651) internal successors, (5648), 1708 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5648 transitions. [2022-03-03 19:06:02,277 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5648 transitions. Word has length 24 [2022-03-03 19:06:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:02,277 INFO L470 AbstractCegarLoop]: Abstraction has 1709 states and 5648 transitions. [2022-03-03 19:06:02,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5648 transitions. [2022-03-03 19:06:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:02,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:02,279 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:02,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-03-03 19:06:02,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:02,480 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash 958336899, now seen corresponding path program 202 times [2022-03-03 19:06:02,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:02,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895235986] [2022-03-03 19:06:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:02,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:02,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895235986] [2022-03-03 19:06:02,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895235986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:02,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756772624] [2022-03-03 19:06:02,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:06:02,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:02,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:02,658 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) [2022-03-03 19:06:02,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-03 19:06:02,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:06:02,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:02,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:02,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:02,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:02,772 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:06:03,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:03,003 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 29 treesize of output 23 [2022-03-03 19:06:03,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:03,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 10 [2022-03-03 19:06:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:03,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:03,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:03,668 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 141 treesize of output 121 [2022-03-03 19:06:03,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:03,855 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 36 treesize of output 38 [2022-03-03 19:06:03,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:03,859 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:06:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:03,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756772624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:03,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:03,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:03,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033447930] [2022-03-03 19:06:03,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:03,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:03,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:03,906 INFO L87 Difference]: Start difference. First operand 1709 states and 5648 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:04,089 INFO L93 Difference]: Finished difference Result 1771 states and 5832 transitions. [2022-03-03 19:06:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:06:04,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:04,092 INFO L225 Difference]: With dead ends: 1771 [2022-03-03 19:06:04,092 INFO L226 Difference]: Without dead ends: 1768 [2022-03-03 19:06:04,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:04,092 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:04,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 231 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 441 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-03-03 19:06:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2022-03-03 19:06:04,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1706. [2022-03-03 19:06:04,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 3.3085043988269796) internal successors, (5641), 1705 states have internal predecessors, (5641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5641 transitions. [2022-03-03 19:06:04,119 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5641 transitions. Word has length 24 [2022-03-03 19:06:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:04,119 INFO L470 AbstractCegarLoop]: Abstraction has 1706 states and 5641 transitions. [2022-03-03 19:06:04,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5641 transitions. [2022-03-03 19:06:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:04,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:04,121 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:04,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:04,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-03 19:06:04,322 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:04,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2128644443, now seen corresponding path program 203 times [2022-03-03 19:06:04,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:04,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947770230] [2022-03-03 19:06:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:04,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:04,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:04,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947770230] [2022-03-03 19:06:04,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947770230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:04,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983102821] [2022-03-03 19:06:04,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:06:04,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:04,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:04,493 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) [2022-03-03 19:06:04,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-03 19:06:04,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:06:04,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:04,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:04,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:04,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:04,599 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 41 treesize of output 35 [2022-03-03 19:06:04,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:04,743 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 21 treesize of output 17 [2022-03-03 19:06:04,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:04,745 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 12 treesize of output 8 [2022-03-03 19:06:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:04,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:05,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:05,306 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 84 treesize of output 75 [2022-03-03 19:06:05,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:05,389 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 34 treesize of output 36 [2022-03-03 19:06:05,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:05,392 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 28 treesize of output 30 [2022-03-03 19:06:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:05,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983102821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:05,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:05,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:05,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961602718] [2022-03-03 19:06:05,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:05,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:05,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:05,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:05,437 INFO L87 Difference]: Start difference. First operand 1706 states and 5641 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:05,722 INFO L93 Difference]: Finished difference Result 1759 states and 5783 transitions. [2022-03-03 19:06:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:06:05,722 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:05,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:05,725 INFO L225 Difference]: With dead ends: 1759 [2022-03-03 19:06:05,725 INFO L226 Difference]: Without dead ends: 1752 [2022-03-03 19:06:05,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:06:05,725 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:05,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 209 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 487 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-03-03 19:06:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-03-03 19:06:05,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1708. [2022-03-03 19:06:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.30697129466901) internal successors, (5645), 1707 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5645 transitions. [2022-03-03 19:06:05,745 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5645 transitions. Word has length 24 [2022-03-03 19:06:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:05,745 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 5645 transitions. [2022-03-03 19:06:05,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:05,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5645 transitions. [2022-03-03 19:06:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:05,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:05,747 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:05,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-03 19:06:05,947 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,SelfDestructingSolverStorable218 [2022-03-03 19:06:05,948 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:05,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1490940925, now seen corresponding path program 204 times [2022-03-03 19:06:05,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:05,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769288447] [2022-03-03 19:06:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:05,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:06,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:06,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769288447] [2022-03-03 19:06:06,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769288447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:06,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608116602] [2022-03-03 19:06:06,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:06:06,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:06,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:06,122 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) [2022-03-03 19:06:06,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-03 19:06:06,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:06:06,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:06,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:06,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:06,233 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 41 treesize of output 35 [2022-03-03 19:06:06,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:06,463 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 29 treesize of output 23 [2022-03-03 19:06:06,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:06,466 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-03 19:06:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:06,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:07,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:07,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:06:07,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:07,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:06:07,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:07,302 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 30 treesize of output 32 [2022-03-03 19:06:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:07,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608116602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:07,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:07,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:07,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656012048] [2022-03-03 19:06:07,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:07,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:07,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:07,349 INFO L87 Difference]: Start difference. First operand 1708 states and 5645 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:07,582 INFO L93 Difference]: Finished difference Result 1848 states and 6009 transitions. [2022-03-03 19:06:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:06:07,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:07,585 INFO L225 Difference]: With dead ends: 1848 [2022-03-03 19:06:07,585 INFO L226 Difference]: Without dead ends: 1798 [2022-03-03 19:06:07,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:06:07,585 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:07,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 238 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 534 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2022-03-03 19:06:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2022-03-03 19:06:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1688. [2022-03-03 19:06:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.3100177830468285) internal successors, (5584), 1687 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5584 transitions. [2022-03-03 19:06:07,612 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5584 transitions. Word has length 24 [2022-03-03 19:06:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:07,612 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5584 transitions. [2022-03-03 19:06:07,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5584 transitions. [2022-03-03 19:06:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:07,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:07,614 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:07,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-03 19:06:07,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:07,815 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1149316057, now seen corresponding path program 205 times [2022-03-03 19:06:07,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:07,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442263674] [2022-03-03 19:06:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:07,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:07,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:07,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442263674] [2022-03-03 19:06:07,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442263674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:07,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910513374] [2022-03-03 19:06:07,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:06:07,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:07,978 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) [2022-03-03 19:06:07,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-03 19:06:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:08,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:08,093 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:06:08,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:08,191 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 43 treesize of output 37 [2022-03-03 19:06:08,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:08,194 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:06:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:08,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:08,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:08,761 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 141 treesize of output 121 [2022-03-03 19:06:08,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:08,943 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 34 treesize of output 36 [2022-03-03 19:06:08,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:08,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 30 [2022-03-03 19:06:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:08,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910513374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:08,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:08,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:08,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080664415] [2022-03-03 19:06:08,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:08,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:08,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:08,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:08,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:08,993 INFO L87 Difference]: Start difference. First operand 1688 states and 5584 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:09,312 INFO L93 Difference]: Finished difference Result 1782 states and 5836 transitions. [2022-03-03 19:06:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:06:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:09,315 INFO L225 Difference]: With dead ends: 1782 [2022-03-03 19:06:09,315 INFO L226 Difference]: Without dead ends: 1747 [2022-03-03 19:06:09,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:06:09,315 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:09,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 207 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 625 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-03-03 19:06:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-03-03 19:06:09,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1688. [2022-03-03 19:06:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.3100177830468285) internal successors, (5584), 1687 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5584 transitions. [2022-03-03 19:06:09,334 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5584 transitions. Word has length 24 [2022-03-03 19:06:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:09,334 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5584 transitions. [2022-03-03 19:06:09,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5584 transitions. [2022-03-03 19:06:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:09,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:09,337 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:09,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-03 19:06:09,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:09,537 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:09,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1838326243, now seen corresponding path program 206 times [2022-03-03 19:06:09,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:09,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154545415] [2022-03-03 19:06:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:09,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:09,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:09,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154545415] [2022-03-03 19:06:09,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154545415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:09,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926045657] [2022-03-03 19:06:09,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:06:09,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:09,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:09,710 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) [2022-03-03 19:06:09,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-03 19:06:09,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:06:09,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:09,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:09,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:09,824 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 41 treesize of output 35 [2022-03-03 19:06:09,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:09,944 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 24 treesize of output 20 [2022-03-03 19:06:09,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:09,946 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 15 treesize of output 7 [2022-03-03 19:06:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:10,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:10,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:10,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:06:10,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:10,623 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 34 treesize of output 36 [2022-03-03 19:06:10,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:10,627 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 30 [2022-03-03 19:06:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:10,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926045657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:10,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:10,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:10,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512499368] [2022-03-03 19:06:10,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:10,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:10,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:10,673 INFO L87 Difference]: Start difference. First operand 1688 states and 5584 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:11,053 INFO L93 Difference]: Finished difference Result 1823 states and 5945 transitions. [2022-03-03 19:06:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:06:11,053 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:11,056 INFO L225 Difference]: With dead ends: 1823 [2022-03-03 19:06:11,056 INFO L226 Difference]: Without dead ends: 1765 [2022-03-03 19:06:11,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:06:11,056 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:11,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 259 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 635 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-03-03 19:06:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-03-03 19:06:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1688. [2022-03-03 19:06:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.3100177830468285) internal successors, (5584), 1687 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5584 transitions. [2022-03-03 19:06:11,076 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5584 transitions. Word has length 24 [2022-03-03 19:06:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:11,076 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5584 transitions. [2022-03-03 19:06:11,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5584 transitions. [2022-03-03 19:06:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:11,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:11,078 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:11,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:11,278 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,SelfDestructingSolverStorable221 [2022-03-03 19:06:11,278 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash -577997105, now seen corresponding path program 207 times [2022-03-03 19:06:11,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:11,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124578323] [2022-03-03 19:06:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:11,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:06:11,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:11,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124578323] [2022-03-03 19:06:11,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124578323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:11,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481013677] [2022-03-03 19:06:11,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:06:11,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:11,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:11,538 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) [2022-03-03 19:06:11,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-03 19:06:11,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:06:11,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:11,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:11,616 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 23 treesize of output 19 [2022-03-03 19:06:11,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:11,698 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 51 treesize of output 43 [2022-03-03 19:06:11,701 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 15 treesize of output 11 [2022-03-03 19:06:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:11,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:12,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:12,277 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-03-03 19:06:12,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:12,439 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 76 treesize of output 69 [2022-03-03 19:06:12,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:12,443 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 60 treesize of output 53 [2022-03-03 19:06:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:12,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481013677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:12,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:12,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-03-03 19:06:12,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089933847] [2022-03-03 19:06:12,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:12,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:06:12,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:12,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:06:12,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:06:12,544 INFO L87 Difference]: Start difference. First operand 1688 states and 5584 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:13,218 INFO L93 Difference]: Finished difference Result 1856 states and 6042 transitions. [2022-03-03 19:06:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:06:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:13,221 INFO L225 Difference]: With dead ends: 1856 [2022-03-03 19:06:13,221 INFO L226 Difference]: Without dead ends: 1775 [2022-03-03 19:06:13,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:06:13,222 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 81 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:13,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 274 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 643 Invalid, 0 Unknown, 285 Unchecked, 0.3s Time] [2022-03-03 19:06:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-03-03 19:06:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1692. [2022-03-03 19:06:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.3116499112950915) internal successors, (5600), 1691 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5600 transitions. [2022-03-03 19:06:13,241 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5600 transitions. Word has length 24 [2022-03-03 19:06:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:13,241 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 5600 transitions. [2022-03-03 19:06:13,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5600 transitions. [2022-03-03 19:06:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:13,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:13,243 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:13,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-03 19:06:13,444 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,SelfDestructingSolverStorable222 [2022-03-03 19:06:13,444 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:13,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1742439369, now seen corresponding path program 208 times [2022-03-03 19:06:13,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:13,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963384430] [2022-03-03 19:06:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:13,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:13,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:13,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963384430] [2022-03-03 19:06:13,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963384430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:13,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106676829] [2022-03-03 19:06:13,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:06:13,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:13,659 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) [2022-03-03 19:06:13,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-03 19:06:13,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:06:13,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:13,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:13,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:13,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:13,772 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:06:13,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:13,950 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 [2022-03-03 19:06:13,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:13,953 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 48 treesize of output 28 [2022-03-03 19:06:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:14,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:14,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:14,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-03 19:06:14,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:14,747 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 94 [2022-03-03 19:06:14,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:14,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 74 [2022-03-03 19:06:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:14,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106676829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:14,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:14,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:14,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842869995] [2022-03-03 19:06:14,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:14,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:14,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:14,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:14,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:14,829 INFO L87 Difference]: Start difference. First operand 1692 states and 5600 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:16,024 INFO L93 Difference]: Finished difference Result 1984 states and 6320 transitions. [2022-03-03 19:06:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:06:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:16,028 INFO L225 Difference]: With dead ends: 1984 [2022-03-03 19:06:16,028 INFO L226 Difference]: Without dead ends: 1863 [2022-03-03 19:06:16,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:06:16,028 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 91 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:16,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 347 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 896 Invalid, 0 Unknown, 168 Unchecked, 0.4s Time] [2022-03-03 19:06:16,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2022-03-03 19:06:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1700. [2022-03-03 19:06:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.311359623307828) internal successors, (5626), 1699 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5626 transitions. [2022-03-03 19:06:16,051 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5626 transitions. Word has length 24 [2022-03-03 19:06:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:16,051 INFO L470 AbstractCegarLoop]: Abstraction has 1700 states and 5626 transitions. [2022-03-03 19:06:16,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:16,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5626 transitions. [2022-03-03 19:06:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:16,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:16,053 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:16,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-03 19:06:16,253 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,SelfDestructingSolverStorable223 [2022-03-03 19:06:16,254 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:16,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1703905455, now seen corresponding path program 209 times [2022-03-03 19:06:16,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:16,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228429005] [2022-03-03 19:06:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:16,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:16,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:16,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228429005] [2022-03-03 19:06:16,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228429005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:16,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414082393] [2022-03-03 19:06:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:06:16,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:16,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:16,460 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) [2022-03-03 19:06:16,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-03 19:06:16,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:06:16,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:16,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:16,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:16,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:16,557 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 23 treesize of output 19 [2022-03-03 19:06:16,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:16,720 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 41 treesize of output 35 [2022-03-03 19:06:16,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:16,723 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 37 treesize of output 21 [2022-03-03 19:06:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:16,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:17,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:17,236 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 130 treesize of output 120 [2022-03-03 19:06:17,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:17,389 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 81 treesize of output 74 [2022-03-03 19:06:17,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:17,393 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 65 treesize of output 58 [2022-03-03 19:06:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:17,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414082393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:17,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:17,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:17,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882026058] [2022-03-03 19:06:17,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:17,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:17,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:17,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:17,495 INFO L87 Difference]: Start difference. First operand 1700 states and 5626 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:18,034 INFO L93 Difference]: Finished difference Result 1786 states and 5860 transitions. [2022-03-03 19:06:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:06:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:18,037 INFO L225 Difference]: With dead ends: 1786 [2022-03-03 19:06:18,037 INFO L226 Difference]: Without dead ends: 1747 [2022-03-03 19:06:18,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:06:18,038 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:18,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 273 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 745 Invalid, 0 Unknown, 126 Unchecked, 0.3s Time] [2022-03-03 19:06:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-03-03 19:06:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1698. [2022-03-03 19:06:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.311137301119623) internal successors, (5619), 1697 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5619 transitions. [2022-03-03 19:06:18,057 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5619 transitions. Word has length 24 [2022-03-03 19:06:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:18,057 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 5619 transitions. [2022-03-03 19:06:18,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5619 transitions. [2022-03-03 19:06:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:18,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:18,059 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:18,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-03 19:06:18,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-03 19:06:18,259 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash -269446261, now seen corresponding path program 210 times [2022-03-03 19:06:18,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:18,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152461733] [2022-03-03 19:06:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:18,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:18,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:18,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152461733] [2022-03-03 19:06:18,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152461733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:18,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139209853] [2022-03-03 19:06:18,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:06:18,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:18,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:18,466 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) [2022-03-03 19:06:18,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-03 19:06:18,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:06:18,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:18,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:18,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:18,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:18,586 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:06:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:18,636 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 [2022-03-03 19:06:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:18,639 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:06:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:18,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:19,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:19,432 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 102 treesize of output 96 [2022-03-03 19:06:19,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:19,608 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-03-03 19:06:19,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:19,614 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-03-03 19:06:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:19,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139209853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:19,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:19,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:06:19,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047454777] [2022-03-03 19:06:19,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:19,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:06:19,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:06:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:06:19,716 INFO L87 Difference]: Start difference. First operand 1698 states and 5619 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:06:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:20,007 INFO L93 Difference]: Finished difference Result 1824 states and 5966 transitions. [2022-03-03 19:06:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:06:20,008 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:06:20,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:20,011 INFO L225 Difference]: With dead ends: 1824 [2022-03-03 19:06:20,011 INFO L226 Difference]: Without dead ends: 1758 [2022-03-03 19:06:20,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:06:20,011 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:20,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 144 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 515 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-03-03 19:06:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-03-03 19:06:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1696. [2022-03-03 19:06:20,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 3.312094395280236) internal successors, (5614), 1695 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 5614 transitions. [2022-03-03 19:06:20,037 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 5614 transitions. Word has length 24 [2022-03-03 19:06:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:20,038 INFO L470 AbstractCegarLoop]: Abstraction has 1696 states and 5614 transitions. [2022-03-03 19:06:20,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:06:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 5614 transitions. [2022-03-03 19:06:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:20,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:20,040 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:20,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-03-03 19:06:20,240 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,SelfDestructingSolverStorable225 [2022-03-03 19:06:20,240 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1992554091, now seen corresponding path program 211 times [2022-03-03 19:06:20,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:20,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499940067] [2022-03-03 19:06:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:20,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:20,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:20,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499940067] [2022-03-03 19:06:20,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499940067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:20,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971769506] [2022-03-03 19:06:20,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:06:20,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:20,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:20,457 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) [2022-03-03 19:06:20,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-03 19:06:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:20,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:20,570 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 23 treesize of output 19 [2022-03-03 19:06:20,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:20,738 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 65 treesize of output 53 [2022-03-03 19:06:20,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:20,740 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 53 treesize of output 33 [2022-03-03 19:06:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:20,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:21,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:21,277 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-03 19:06:21,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:21,462 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 106 treesize of output 94 [2022-03-03 19:06:21,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:21,467 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 86 treesize of output 74 [2022-03-03 19:06:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:21,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971769506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:21,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:21,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:21,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41446749] [2022-03-03 19:06:21,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:21,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:21,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:21,548 INFO L87 Difference]: Start difference. First operand 1696 states and 5614 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:21,965 INFO L93 Difference]: Finished difference Result 1848 states and 5995 transitions. [2022-03-03 19:06:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:06:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:21,968 INFO L225 Difference]: With dead ends: 1848 [2022-03-03 19:06:21,968 INFO L226 Difference]: Without dead ends: 1770 [2022-03-03 19:06:21,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:06:21,968 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:21,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 296 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 608 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-03-03 19:06:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-03-03 19:06:21,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1698. [2022-03-03 19:06:21,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.311137301119623) internal successors, (5619), 1697 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5619 transitions. [2022-03-03 19:06:21,987 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5619 transitions. Word has length 24 [2022-03-03 19:06:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:21,988 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 5619 transitions. [2022-03-03 19:06:21,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5619 transitions. [2022-03-03 19:06:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:21,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:21,990 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:22,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:22,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:22,197 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash 894128687, now seen corresponding path program 212 times [2022-03-03 19:06:22,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:22,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747027150] [2022-03-03 19:06:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:22,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:22,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:22,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747027150] [2022-03-03 19:06:22,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747027150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:22,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464360332] [2022-03-03 19:06:22,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:06:22,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:22,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:22,416 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) [2022-03-03 19:06:22,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-03 19:06:22,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:06:22,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:22,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:22,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:22,542 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 23 treesize of output 19 [2022-03-03 19:06:22,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:22,615 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 51 treesize of output 43 [2022-03-03 19:06:22,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:22,618 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 53 treesize of output 33 [2022-03-03 19:06:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:22,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:23,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:23,181 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 100 treesize of output 94 [2022-03-03 19:06:23,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:23,371 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 144 treesize of output 124 [2022-03-03 19:06:23,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:23,376 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 116 treesize of output 96 [2022-03-03 19:06:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:23,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464360332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:23,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:23,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:23,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635431012] [2022-03-03 19:06:23,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:23,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:23,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:23,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:23,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:23,478 INFO L87 Difference]: Start difference. First operand 1698 states and 5619 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:23,942 INFO L93 Difference]: Finished difference Result 1870 states and 6037 transitions. [2022-03-03 19:06:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:06:23,942 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:23,945 INFO L225 Difference]: With dead ends: 1870 [2022-03-03 19:06:23,945 INFO L226 Difference]: Without dead ends: 1796 [2022-03-03 19:06:23,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:06:23,946 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:23,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 214 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 558 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2022-03-03 19:06:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-03-03 19:06:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1697. [2022-03-03 19:06:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3101415094339623) internal successors, (5614), 1696 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5614 transitions. [2022-03-03 19:06:23,965 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5614 transitions. Word has length 24 [2022-03-03 19:06:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:23,965 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 5614 transitions. [2022-03-03 19:06:23,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5614 transitions. [2022-03-03 19:06:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:23,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:23,967 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:23,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:24,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:24,168 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:24,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1110876975, now seen corresponding path program 213 times [2022-03-03 19:06:24,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:24,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186513907] [2022-03-03 19:06:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:06:24,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:24,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186513907] [2022-03-03 19:06:24,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186513907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:24,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795512835] [2022-03-03 19:06:24,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:06:24,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:24,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:24,432 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) [2022-03-03 19:06:24,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-03 19:06:24,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:06:24,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:24,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:24,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:24,530 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:06:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:24,622 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:06:24,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:24,624 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 37 treesize of output 21 [2022-03-03 19:06:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:06:24,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:25,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:25,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 122 [2022-03-03 19:06:25,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:25,451 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-03 19:06:25,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:25,456 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 64 treesize of output 57 [2022-03-03 19:06:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:06:25,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795512835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:25,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:25,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:25,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242775371] [2022-03-03 19:06:25,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:25,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:25,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:25,566 INFO L87 Difference]: Start difference. First operand 1697 states and 5614 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:25,998 INFO L93 Difference]: Finished difference Result 1797 states and 5881 transitions. [2022-03-03 19:06:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:06:25,998 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:26,001 INFO L225 Difference]: With dead ends: 1797 [2022-03-03 19:06:26,001 INFO L226 Difference]: Without dead ends: 1778 [2022-03-03 19:06:26,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:06:26,002 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:26,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 194 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 565 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-03-03 19:06:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-03-03 19:06:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1697. [2022-03-03 19:06:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3101415094339623) internal successors, (5614), 1696 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5614 transitions. [2022-03-03 19:06:26,028 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5614 transitions. Word has length 24 [2022-03-03 19:06:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:26,028 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 5614 transitions. [2022-03-03 19:06:26,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:26,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5614 transitions. [2022-03-03 19:06:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:26,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:26,031 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:26,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:26,231 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,SelfDestructingSolverStorable228 [2022-03-03 19:06:26,231 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash 135828057, now seen corresponding path program 214 times [2022-03-03 19:06:26,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:26,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831245415] [2022-03-03 19:06:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:26,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:26,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:26,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831245415] [2022-03-03 19:06:26,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831245415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:26,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483936003] [2022-03-03 19:06:26,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:06:26,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:26,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:26,449 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) [2022-03-03 19:06:26,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-03 19:06:26,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:06:26,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:26,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:26,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:26,563 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 41 treesize of output 35 [2022-03-03 19:06:26,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:26,634 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 43 treesize of output 37 [2022-03-03 19:06:26,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:26,637 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 37 treesize of output 21 [2022-03-03 19:06:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:26,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:27,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:27,434 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 69 treesize of output 67 [2022-03-03 19:06:27,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:27,536 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-03-03 19:06:27,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:27,541 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 85 treesize of output 73 [2022-03-03 19:06:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:27,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483936003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:27,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:27,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:27,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919068161] [2022-03-03 19:06:27,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:27,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:27,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:27,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:27,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:27,629 INFO L87 Difference]: Start difference. First operand 1697 states and 5614 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:29,339 INFO L93 Difference]: Finished difference Result 2309 states and 7174 transitions. [2022-03-03 19:06:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:06:29,339 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:29,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:29,343 INFO L225 Difference]: With dead ends: 2309 [2022-03-03 19:06:29,343 INFO L226 Difference]: Without dead ends: 2105 [2022-03-03 19:06:29,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:06:29,343 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 247 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:29,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 416 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1214 Invalid, 0 Unknown, 150 Unchecked, 0.5s Time] [2022-03-03 19:06:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2022-03-03 19:06:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1703. [2022-03-03 19:06:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.3131609870740304) internal successors, (5639), 1702 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5639 transitions. [2022-03-03 19:06:29,365 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5639 transitions. Word has length 24 [2022-03-03 19:06:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:29,365 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 5639 transitions. [2022-03-03 19:06:29,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5639 transitions. [2022-03-03 19:06:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:29,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:29,367 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:29,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:29,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:29,568 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash 20307343, now seen corresponding path program 215 times [2022-03-03 19:06:29,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:29,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859378574] [2022-03-03 19:06:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:29,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:29,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:29,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859378574] [2022-03-03 19:06:29,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859378574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:29,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141112107] [2022-03-03 19:06:29,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:06:29,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:29,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:29,795 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) [2022-03-03 19:06:29,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-03 19:06:29,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:06:29,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:29,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:29,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:29,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:29,893 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 41 treesize of output 35 [2022-03-03 19:06:29,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:29,968 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 24 treesize of output 20 [2022-03-03 19:06:29,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:29,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:06:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:30,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:30,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:30,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 68 [2022-03-03 19:06:30,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:30,661 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 76 treesize of output 69 [2022-03-03 19:06:30,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:30,665 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 60 treesize of output 53 [2022-03-03 19:06:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:30,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141112107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:30,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:30,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:30,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304958353] [2022-03-03 19:06:30,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:30,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:30,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:30,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:30,794 INFO L87 Difference]: Start difference. First operand 1703 states and 5639 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:31,167 INFO L93 Difference]: Finished difference Result 1798 states and 5917 transitions. [2022-03-03 19:06:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:06:31,167 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:31,170 INFO L225 Difference]: With dead ends: 1798 [2022-03-03 19:06:31,170 INFO L226 Difference]: Without dead ends: 1767 [2022-03-03 19:06:31,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:06:31,170 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:31,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 185 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 592 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-03-03 19:06:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2022-03-03 19:06:31,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1710. [2022-03-03 19:06:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.3159742539496784) internal successors, (5667), 1709 states have internal predecessors, (5667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5667 transitions. [2022-03-03 19:06:31,189 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5667 transitions. Word has length 24 [2022-03-03 19:06:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:31,189 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 5667 transitions. [2022-03-03 19:06:31,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5667 transitions. [2022-03-03 19:06:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:31,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:31,192 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:31,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-03 19:06:31,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:31,393 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:31,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1528256831, now seen corresponding path program 216 times [2022-03-03 19:06:31,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:31,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616170894] [2022-03-03 19:06:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:31,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:31,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616170894] [2022-03-03 19:06:31,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616170894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:31,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243364928] [2022-03-03 19:06:31,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:06:31,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:31,593 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) [2022-03-03 19:06:31,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-03 19:06:31,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:06:31,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:31,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:31,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:31,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:31,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:06:31,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:31,949 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 29 treesize of output 23 [2022-03-03 19:06:31,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:31,951 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 22 treesize of output 14 [2022-03-03 19:06:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:32,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:32,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:32,596 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-03 19:06:32,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:32,734 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 122 treesize of output 108 [2022-03-03 19:06:32,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:32,740 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-03-03 19:06:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:32,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243364928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:32,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:32,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:32,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784273033] [2022-03-03 19:06:32,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:32,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:32,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:32,818 INFO L87 Difference]: Start difference. First operand 1710 states and 5667 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:33,145 INFO L93 Difference]: Finished difference Result 1907 states and 6165 transitions. [2022-03-03 19:06:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:06:33,145 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:33,148 INFO L225 Difference]: With dead ends: 1907 [2022-03-03 19:06:33,149 INFO L226 Difference]: Without dead ends: 1830 [2022-03-03 19:06:33,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:06:33,149 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:33,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 276 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 524 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-03-03 19:06:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-03-03 19:06:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1741. [2022-03-03 19:06:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 3.296551724137931) internal successors, (5736), 1740 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 5736 transitions. [2022-03-03 19:06:33,170 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 5736 transitions. Word has length 24 [2022-03-03 19:06:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:33,170 INFO L470 AbstractCegarLoop]: Abstraction has 1741 states and 5736 transitions. [2022-03-03 19:06:33,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 5736 transitions. [2022-03-03 19:06:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:33,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:33,173 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:33,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-03-03 19:06:33,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:33,373 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2091328537, now seen corresponding path program 217 times [2022-03-03 19:06:33,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:33,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146362152] [2022-03-03 19:06:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:33,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:33,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:33,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146362152] [2022-03-03 19:06:33,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146362152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:33,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073080004] [2022-03-03 19:06:33,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:06:33,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:33,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:33,565 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) [2022-03-03 19:06:33,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-03 19:06:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:33,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:33,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:33,678 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 [2022-03-03 19:06:33,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:33,944 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 29 treesize of output 23 [2022-03-03 19:06:33,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:33,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:06:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:33,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:34,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:34,536 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 78 treesize of output 74 [2022-03-03 19:06:34,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:34,652 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-03-03 19:06:34,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:34,659 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 92 treesize of output 78 [2022-03-03 19:06:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:34,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073080004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:34,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:34,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:34,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515104182] [2022-03-03 19:06:34,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:34,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:34,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:34,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:34,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:34,736 INFO L87 Difference]: Start difference. First operand 1741 states and 5736 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:35,149 INFO L93 Difference]: Finished difference Result 1922 states and 6188 transitions. [2022-03-03 19:06:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:06:35,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:35,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:35,152 INFO L225 Difference]: With dead ends: 1922 [2022-03-03 19:06:35,153 INFO L226 Difference]: Without dead ends: 1828 [2022-03-03 19:06:35,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:06:35,153 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:35,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 274 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 785 Invalid, 0 Unknown, 238 Unchecked, 0.3s Time] [2022-03-03 19:06:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-03-03 19:06:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1703. [2022-03-03 19:06:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.3131609870740304) internal successors, (5639), 1702 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5639 transitions. [2022-03-03 19:06:35,173 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5639 transitions. Word has length 24 [2022-03-03 19:06:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:35,173 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 5639 transitions. [2022-03-03 19:06:35,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5639 transitions. [2022-03-03 19:06:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:35,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:35,175 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:35,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:35,379 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,SelfDestructingSolverStorable232 [2022-03-03 19:06:35,379 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2012659601, now seen corresponding path program 218 times [2022-03-03 19:06:35,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:35,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393170423] [2022-03-03 19:06:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:35,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:35,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:35,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393170423] [2022-03-03 19:06:35,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393170423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:35,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356815594] [2022-03-03 19:06:35,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:06:35,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:35,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:35,574 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) [2022-03-03 19:06:35,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-03 19:06:35,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:06:35,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:35,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:35,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:35,694 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 41 treesize of output 35 [2022-03-03 19:06:35,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:35,794 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 43 treesize of output 37 [2022-03-03 19:06:35,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:35,797 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 37 treesize of output 21 [2022-03-03 19:06:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:35,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:36,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:36,359 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 100 treesize of output 94 [2022-03-03 19:06:36,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:36,544 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 148 treesize of output 128 [2022-03-03 19:06:36,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:36,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 100 [2022-03-03 19:06:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:36,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356815594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:36,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:36,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:36,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825377038] [2022-03-03 19:06:36,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:36,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:36,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:36,669 INFO L87 Difference]: Start difference. First operand 1703 states and 5639 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:37,041 INFO L93 Difference]: Finished difference Result 1816 states and 5938 transitions. [2022-03-03 19:06:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:06:37,041 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:37,044 INFO L225 Difference]: With dead ends: 1816 [2022-03-03 19:06:37,044 INFO L226 Difference]: Without dead ends: 1781 [2022-03-03 19:06:37,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:06:37,045 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:37,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 220 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 701 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-03-03 19:06:37,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-03-03 19:06:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1703. [2022-03-03 19:06:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.3131609870740304) internal successors, (5639), 1702 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5639 transitions. [2022-03-03 19:06:37,064 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5639 transitions. Word has length 24 [2022-03-03 19:06:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:37,064 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 5639 transitions. [2022-03-03 19:06:37,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5639 transitions. [2022-03-03 19:06:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:37,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:37,066 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:37,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:37,267 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,SelfDestructingSolverStorable233 [2022-03-03 19:06:37,267 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:37,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1323649415, now seen corresponding path program 219 times [2022-03-03 19:06:37,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:37,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393061623] [2022-03-03 19:06:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:37,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:37,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:37,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393061623] [2022-03-03 19:06:37,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393061623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:37,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663298002] [2022-03-03 19:06:37,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:06:37,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:37,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:37,487 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) [2022-03-03 19:06:37,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-03 19:06:37,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:06:37,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:37,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:37,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:37,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:37,601 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 41 treesize of output 35 [2022-03-03 19:06:37,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:37,735 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 24 treesize of output 20 [2022-03-03 19:06:37,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:37,737 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 15 treesize of output 7 [2022-03-03 19:06:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:37,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:38,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:38,239 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 82 treesize of output 78 [2022-03-03 19:06:38,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:38,380 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 122 treesize of output 108 [2022-03-03 19:06:38,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:38,385 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 100 treesize of output 86 [2022-03-03 19:06:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:38,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663298002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:38,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:38,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:38,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340199297] [2022-03-03 19:06:38,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:38,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:38,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:38,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:38,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:38,488 INFO L87 Difference]: Start difference. First operand 1703 states and 5639 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:38,984 INFO L93 Difference]: Finished difference Result 1937 states and 6221 transitions. [2022-03-03 19:06:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:06:38,985 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:38,988 INFO L225 Difference]: With dead ends: 1937 [2022-03-03 19:06:38,988 INFO L226 Difference]: Without dead ends: 1833 [2022-03-03 19:06:38,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:06:38,988 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:38,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 238 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 738 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2022-03-03 19:06:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-03-03 19:06:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1705. [2022-03-03 19:06:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.312206572769953) internal successors, (5644), 1704 states have internal predecessors, (5644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5644 transitions. [2022-03-03 19:06:39,009 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5644 transitions. Word has length 24 [2022-03-03 19:06:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:39,009 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 5644 transitions. [2022-03-03 19:06:39,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5644 transitions. [2022-03-03 19:06:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:39,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:39,011 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:39,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:39,211 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,SelfDestructingSolverStorable234 [2022-03-03 19:06:39,212 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1680695765, now seen corresponding path program 220 times [2022-03-03 19:06:39,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:39,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22087431] [2022-03-03 19:06:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:39,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:39,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:39,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22087431] [2022-03-03 19:06:39,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22087431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:39,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013069610] [2022-03-03 19:06:39,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:06:39,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:39,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:39,375 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) [2022-03-03 19:06:39,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-03 19:06:39,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:06:39,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:39,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:39,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:39,482 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 [2022-03-03 19:06:39,560 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 [2022-03-03 19:06:39,562 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 17 treesize of output 13 [2022-03-03 19:06:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:39,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:39,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:39,976 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 61 treesize of output 61 [2022-03-03 19:06:40,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:40,141 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 121 treesize of output 107 [2022-03-03 19:06:40,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:40,146 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 99 treesize of output 85 [2022-03-03 19:06:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:40,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013069610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:40,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:40,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:06:40,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657419339] [2022-03-03 19:06:40,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:40,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:06:40,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:40,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:06:40,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:06:40,230 INFO L87 Difference]: Start difference. First operand 1705 states and 5644 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:40,732 INFO L93 Difference]: Finished difference Result 1870 states and 6086 transitions. [2022-03-03 19:06:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:06:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:40,736 INFO L225 Difference]: With dead ends: 1870 [2022-03-03 19:06:40,736 INFO L226 Difference]: Without dead ends: 1780 [2022-03-03 19:06:40,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:06:40,736 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:40,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 239 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:06:40,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-03-03 19:06:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1714. [2022-03-03 19:06:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.3105662580268533) internal successors, (5671), 1713 states have internal predecessors, (5671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:40,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5671 transitions. [2022-03-03 19:06:40,756 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5671 transitions. Word has length 24 [2022-03-03 19:06:40,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:40,756 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 5671 transitions. [2022-03-03 19:06:40,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5671 transitions. [2022-03-03 19:06:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:40,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:40,758 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:40,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-03 19:06:40,958 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,SelfDestructingSolverStorable235 [2022-03-03 19:06:40,959 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:40,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:40,959 INFO L85 PathProgramCache]: Analyzing trace with hash -516762591, now seen corresponding path program 221 times [2022-03-03 19:06:40,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:40,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494806463] [2022-03-03 19:06:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:40,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:41,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:41,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494806463] [2022-03-03 19:06:41,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494806463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:41,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464223453] [2022-03-03 19:06:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:06:41,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:41,143 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) [2022-03-03 19:06:41,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-03 19:06:41,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:06:41,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:41,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:41,303 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-03 19:06:41,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:41,352 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 47 treesize of output 41 [2022-03-03 19:06:41,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:41,354 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 48 treesize of output 28 [2022-03-03 19:06:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:41,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:41,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:41,845 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-03 19:06:42,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:42,082 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 147 treesize of output 127 [2022-03-03 19:06:42,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:42,088 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 99 [2022-03-03 19:06:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:42,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464223453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:42,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:42,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:42,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765660192] [2022-03-03 19:06:42,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:42,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:42,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:42,203 INFO L87 Difference]: Start difference. First operand 1714 states and 5671 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:42,475 INFO L93 Difference]: Finished difference Result 1828 states and 5973 transitions. [2022-03-03 19:06:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:06:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:42,478 INFO L225 Difference]: With dead ends: 1828 [2022-03-03 19:06:42,478 INFO L226 Difference]: Without dead ends: 1762 [2022-03-03 19:06:42,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:06:42,479 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:42,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 185 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 500 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-03-03 19:06:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-03-03 19:06:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1714. [2022-03-03 19:06:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.3105662580268533) internal successors, (5671), 1713 states have internal predecessors, (5671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5671 transitions. [2022-03-03 19:06:42,497 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5671 transitions. Word has length 24 [2022-03-03 19:06:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:42,497 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 5671 transitions. [2022-03-03 19:06:42,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5671 transitions. [2022-03-03 19:06:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:42,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:42,500 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:42,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-03 19:06:42,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:42,700 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:42,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:42,700 INFO L85 PathProgramCache]: Analyzing trace with hash 958854987, now seen corresponding path program 222 times [2022-03-03 19:06:42,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:42,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688332203] [2022-03-03 19:06:42,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:42,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:42,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:42,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688332203] [2022-03-03 19:06:42,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688332203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:42,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805018236] [2022-03-03 19:06:42,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:06:42,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:42,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:42,868 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) [2022-03-03 19:06:42,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-03 19:06:42,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:06:42,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:42,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:42,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:43,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:43,020 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 29 treesize of output 23 [2022-03-03 19:06:43,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:43,066 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 54 treesize of output 46 [2022-03-03 19:06:43,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:43,069 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 50 treesize of output 30 [2022-03-03 19:06:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:43,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:43,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:43,665 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 108 treesize of output 102 [2022-03-03 19:06:43,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:43,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 105 [2022-03-03 19:06:43,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:43,918 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 97 treesize of output 83 [2022-03-03 19:06:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:44,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805018236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:44,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:44,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:06:44,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207815225] [2022-03-03 19:06:44,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:44,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:06:44,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:06:44,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:06:44,023 INFO L87 Difference]: Start difference. First operand 1714 states and 5671 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:06:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:44,574 INFO L93 Difference]: Finished difference Result 1900 states and 6156 transitions. [2022-03-03 19:06:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:06:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:06:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:44,577 INFO L225 Difference]: With dead ends: 1900 [2022-03-03 19:06:44,577 INFO L226 Difference]: Without dead ends: 1824 [2022-03-03 19:06:44,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:06:44,578 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:44,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 258 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 970 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2022-03-03 19:06:44,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2022-03-03 19:06:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1720. [2022-03-03 19:06:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.310063990692263) internal successors, (5690), 1719 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5690 transitions. [2022-03-03 19:06:44,597 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5690 transitions. Word has length 24 [2022-03-03 19:06:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:44,597 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 5690 transitions. [2022-03-03 19:06:44,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:06:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5690 transitions. [2022-03-03 19:06:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:44,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:44,600 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:44,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-03 19:06:44,800 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,SelfDestructingSolverStorable237 [2022-03-03 19:06:44,800 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash -205587277, now seen corresponding path program 223 times [2022-03-03 19:06:44,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:44,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312039206] [2022-03-03 19:06:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:44,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:44,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:44,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312039206] [2022-03-03 19:06:44,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312039206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:44,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23310333] [2022-03-03 19:06:44,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:06:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:44,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:44,963 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) [2022-03-03 19:06:44,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-03 19:06:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:44,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:44,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:45,070 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 [2022-03-03 19:06:45,109 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 54 treesize of output 46 [2022-03-03 19:06:45,111 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 [2022-03-03 19:06:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:45,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:45,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:45,553 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 108 treesize of output 102 [2022-03-03 19:06:45,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:45,800 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 123 treesize of output 109 [2022-03-03 19:06:45,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:45,805 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 101 treesize of output 87 [2022-03-03 19:06:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:45,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23310333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:45,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:45,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:06:45,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481472011] [2022-03-03 19:06:45,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:45,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:06:45,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:06:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:06:45,893 INFO L87 Difference]: Start difference. First operand 1720 states and 5690 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:46,796 INFO L93 Difference]: Finished difference Result 2001 states and 6381 transitions. [2022-03-03 19:06:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:06:46,796 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:46,799 INFO L225 Difference]: With dead ends: 2001 [2022-03-03 19:06:46,799 INFO L226 Difference]: Without dead ends: 1880 [2022-03-03 19:06:46,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:06:46,800 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 94 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:46,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 336 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 982 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2022-03-03 19:06:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2022-03-03 19:06:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1718. [2022-03-03 19:06:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.3098427489807802) internal successors, (5683), 1717 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5683 transitions. [2022-03-03 19:06:46,820 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5683 transitions. Word has length 24 [2022-03-03 19:06:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:46,820 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 5683 transitions. [2022-03-03 19:06:46,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5683 transitions. [2022-03-03 19:06:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:46,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:46,822 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:46,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:47,022 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,SelfDestructingSolverStorable238 [2022-03-03 19:06:47,023 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:47,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash -705554193, now seen corresponding path program 224 times [2022-03-03 19:06:47,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:47,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280860417] [2022-03-03 19:06:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:47,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:47,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:47,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280860417] [2022-03-03 19:06:47,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280860417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:47,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000600825] [2022-03-03 19:06:47,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:06:47,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:47,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:47,198 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) [2022-03-03 19:06:47,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-03 19:06:47,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:06:47,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:47,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:47,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:47,293 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 41 treesize of output 35 [2022-03-03 19:06:47,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:47,488 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 26 treesize of output 22 [2022-03-03 19:06:47,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:47,491 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:06:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:47,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:47,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:47,985 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 76 treesize of output 72 [2022-03-03 19:06:48,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:48,091 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 87 treesize of output 78 [2022-03-03 19:06:48,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:48,096 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-03-03 19:06:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:48,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000600825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:48,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:48,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:48,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269671299] [2022-03-03 19:06:48,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:48,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:48,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:48,200 INFO L87 Difference]: Start difference. First operand 1718 states and 5683 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:48,631 INFO L93 Difference]: Finished difference Result 1815 states and 5952 transitions. [2022-03-03 19:06:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:06:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:48,634 INFO L225 Difference]: With dead ends: 1815 [2022-03-03 19:06:48,634 INFO L226 Difference]: Without dead ends: 1756 [2022-03-03 19:06:48,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:06:48,634 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:48,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 245 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 693 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-03-03 19:06:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-03-03 19:06:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1719. [2022-03-03 19:06:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.310244470314319) internal successors, (5687), 1718 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5687 transitions. [2022-03-03 19:06:48,664 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5687 transitions. Word has length 24 [2022-03-03 19:06:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:48,665 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 5687 transitions. [2022-03-03 19:06:48,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5687 transitions. [2022-03-03 19:06:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:48,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:48,667 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:48,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-03 19:06:48,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:48,867 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:48,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:48,868 INFO L85 PathProgramCache]: Analyzing trace with hash 458378981, now seen corresponding path program 225 times [2022-03-03 19:06:48,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:48,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297852343] [2022-03-03 19:06:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:48,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:49,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:49,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297852343] [2022-03-03 19:06:49,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297852343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:49,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082651234] [2022-03-03 19:06:49,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:06:49,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:49,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:49,026 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) [2022-03-03 19:06:49,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-03 19:06:49,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:06:49,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:49,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:49,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:49,108 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 35 [2022-03-03 19:06:49,189 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 41 [2022-03-03 19:06:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:49,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:49,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:49,852 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 82 treesize of output 78 [2022-03-03 19:06:49,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:49,957 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 118 treesize of output 104 [2022-03-03 19:06:49,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:49,962 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 82 [2022-03-03 19:06:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:50,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082651234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:50,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:50,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:06:50,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271463079] [2022-03-03 19:06:50,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:50,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:06:50,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:06:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:06:50,041 INFO L87 Difference]: Start difference. First operand 1719 states and 5687 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:51,008 INFO L93 Difference]: Finished difference Result 2317 states and 7280 transitions. [2022-03-03 19:06:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:06:51,008 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:51,012 INFO L225 Difference]: With dead ends: 2317 [2022-03-03 19:06:51,012 INFO L226 Difference]: Without dead ends: 2179 [2022-03-03 19:06:51,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:06:51,012 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:51,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 412 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:06:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2022-03-03 19:06:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1719. [2022-03-03 19:06:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.310244470314319) internal successors, (5687), 1718 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5687 transitions. [2022-03-03 19:06:51,035 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5687 transitions. Word has length 24 [2022-03-03 19:06:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:51,035 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 5687 transitions. [2022-03-03 19:06:51,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5687 transitions. [2022-03-03 19:06:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:51,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:51,038 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:51,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-03 19:06:51,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:51,238 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:51,238 INFO L85 PathProgramCache]: Analyzing trace with hash -397003349, now seen corresponding path program 226 times [2022-03-03 19:06:51,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:51,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124234166] [2022-03-03 19:06:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:51,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:51,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:51,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124234166] [2022-03-03 19:06:51,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124234166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:51,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083827879] [2022-03-03 19:06:51,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:06:51,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:51,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:51,456 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) [2022-03-03 19:06:51,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-03 19:06:51,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:06:51,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:51,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:51,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:51,591 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 41 treesize of output 35 [2022-03-03 19:06:51,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:51,791 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 29 treesize of output 23 [2022-03-03 19:06:51,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:51,793 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 25 treesize of output 12 [2022-03-03 19:06:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:51,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:52,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:52,299 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 78 treesize of output 74 [2022-03-03 19:06:52,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:52,450 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 122 treesize of output 108 [2022-03-03 19:06:52,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:52,455 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 100 treesize of output 86 [2022-03-03 19:06:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:52,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083827879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:52,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:52,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:52,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943867834] [2022-03-03 19:06:52,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:52,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:52,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:52,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:52,534 INFO L87 Difference]: Start difference. First operand 1719 states and 5687 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:52,898 INFO L93 Difference]: Finished difference Result 1920 states and 6211 transitions. [2022-03-03 19:06:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:06:52,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:52,902 INFO L225 Difference]: With dead ends: 1920 [2022-03-03 19:06:52,902 INFO L226 Difference]: Without dead ends: 1818 [2022-03-03 19:06:52,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:06:52,902 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:52,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 219 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 627 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-03-03 19:06:52,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-03-03 19:06:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1727. [2022-03-03 19:06:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 3.309385863267671) internal successors, (5712), 1726 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 5712 transitions. [2022-03-03 19:06:52,922 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 5712 transitions. Word has length 24 [2022-03-03 19:06:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:52,922 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 5712 transitions. [2022-03-03 19:06:52,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 5712 transitions. [2022-03-03 19:06:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:52,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:52,925 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:52,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:53,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:53,125 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash -616234577, now seen corresponding path program 227 times [2022-03-03 19:06:53,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:53,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566194381] [2022-03-03 19:06:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:53,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:53,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:53,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566194381] [2022-03-03 19:06:53,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566194381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:53,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368125221] [2022-03-03 19:06:53,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:06:53,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:53,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:53,326 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) [2022-03-03 19:06:53,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-03 19:06:53,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:06:53,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:53,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:53,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:53,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:53,440 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 41 treesize of output 35 [2022-03-03 19:06:53,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:53,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22 [2022-03-03 19:06:53,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:53,650 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 15 treesize of output 7 [2022-03-03 19:06:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:53,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:54,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:54,380 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 100 treesize of output 94 [2022-03-03 19:06:54,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:54,509 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 144 treesize of output 124 [2022-03-03 19:06:54,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:54,515 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 116 treesize of output 96 [2022-03-03 19:06:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:54,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368125221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:54,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:54,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:06:54,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757981693] [2022-03-03 19:06:54,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:54,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:06:54,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:06:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:06:54,663 INFO L87 Difference]: Start difference. First operand 1727 states and 5712 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:54,914 INFO L93 Difference]: Finished difference Result 1800 states and 5923 transitions. [2022-03-03 19:06:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:06:54,914 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:06:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:54,917 INFO L225 Difference]: With dead ends: 1800 [2022-03-03 19:06:54,917 INFO L226 Difference]: Without dead ends: 1769 [2022-03-03 19:06:54,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:06:54,917 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:54,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 207 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 564 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-03-03 19:06:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-03-03 19:06:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1720. [2022-03-03 19:06:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.31064572425829) internal successors, (5691), 1719 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5691 transitions. [2022-03-03 19:06:54,936 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5691 transitions. Word has length 24 [2022-03-03 19:06:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:54,936 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 5691 transitions. [2022-03-03 19:06:54,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5691 transitions. [2022-03-03 19:06:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:54,939 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:54,939 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:54,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-03 19:06:55,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:55,139 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:55,139 INFO L85 PathProgramCache]: Analyzing trace with hash 742052065, now seen corresponding path program 228 times [2022-03-03 19:06:55,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:55,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261843901] [2022-03-03 19:06:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:55,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:55,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:55,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261843901] [2022-03-03 19:06:55,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261843901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:55,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590352746] [2022-03-03 19:06:55,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:06:55,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:55,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:55,291 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) [2022-03-03 19:06:55,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-03 19:06:55,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:06:55,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:06:55,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:06:55,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:55,350 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 48 treesize of output 40 [2022-03-03 19:06:55,396 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 55 treesize of output 45 [2022-03-03 19:06:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:55,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:56,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:56,201 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 69 treesize of output 67 [2022-03-03 19:06:56,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:56,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 72 [2022-03-03 19:06:56,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:56,303 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 63 treesize of output 56 [2022-03-03 19:06:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:56,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590352746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:56,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:56,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:06:56,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411146199] [2022-03-03 19:06:56,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:56,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:06:56,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:56,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:06:56,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:06:56,407 INFO L87 Difference]: Start difference. First operand 1720 states and 5691 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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) [2022-03-03 19:06:56,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:56,897 INFO L93 Difference]: Finished difference Result 2070 states and 6598 transitions. [2022-03-03 19:06:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:06:56,897 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 24 [2022-03-03 19:06:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:56,901 INFO L225 Difference]: With dead ends: 2070 [2022-03-03 19:06:56,901 INFO L226 Difference]: Without dead ends: 1977 [2022-03-03 19:06:56,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:06:56,901 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:56,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 229 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:06:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2022-03-03 19:06:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1723. [2022-03-03 19:06:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.31068524970964) internal successors, (5701), 1722 states have internal predecessors, (5701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5701 transitions. [2022-03-03 19:06:56,922 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5701 transitions. Word has length 24 [2022-03-03 19:06:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:56,922 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 5701 transitions. [2022-03-03 19:06:56,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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) [2022-03-03 19:06:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5701 transitions. [2022-03-03 19:06:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:56,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:56,925 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:56,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-03-03 19:06:57,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:57,125 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:06:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:06:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash 169127301, now seen corresponding path program 229 times [2022-03-03 19:06:57,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:06:57,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350491756] [2022-03-03 19:06:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:06:57,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:06:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:57,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:06:57,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350491756] [2022-03-03 19:06:57,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350491756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:06:57,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351336750] [2022-03-03 19:06:57,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:06:57,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:06:57,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:06:57,316 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) [2022-03-03 19:06:57,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-03 19:06:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:06:57,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:06:57,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:06:57,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:57,428 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 41 treesize of output 35 [2022-03-03 19:06:57,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:57,509 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 47 treesize of output 41 [2022-03-03 19:06:57,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:06:57,513 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 37 treesize of output 21 [2022-03-03 19:06:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:57,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:06:58,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:58,250 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 69 treesize of output 67 [2022-03-03 19:06:58,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:58,347 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 105 treesize of output 93 [2022-03-03 19:06:58,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:06:58,353 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 85 treesize of output 73 [2022-03-03 19:06:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:06:58,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351336750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:06:58,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:06:58,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:06:58,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655650311] [2022-03-03 19:06:58,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:06:58,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:06:58,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:06:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:06:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:06:58,454 INFO L87 Difference]: Start difference. First operand 1723 states and 5701 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2022-03-03 19:06:59,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:06:59,877 INFO L93 Difference]: Finished difference Result 2298 states and 7242 transitions. [2022-03-03 19:06:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:06:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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 24 [2022-03-03 19:06:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:06:59,881 INFO L225 Difference]: With dead ends: 2298 [2022-03-03 19:06:59,881 INFO L226 Difference]: Without dead ends: 2152 [2022-03-03 19:06:59,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:06:59,882 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:06:59,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 385 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 966 Invalid, 0 Unknown, 69 Unchecked, 0.4s Time] [2022-03-03 19:06:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-03-03 19:06:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1732. [2022-03-03 19:06:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 3.3194685153090697) internal successors, (5746), 1731 states have internal predecessors, (5746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:06:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 5746 transitions. [2022-03-03 19:06:59,912 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 5746 transitions. Word has length 24 [2022-03-03 19:06:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:06:59,912 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 5746 transitions. [2022-03-03 19:06:59,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2022-03-03 19:06:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 5746 transitions. [2022-03-03 19:06:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:06:59,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:06:59,914 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:06:59,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:00,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:00,115 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:00,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:00,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1162785999, now seen corresponding path program 230 times [2022-03-03 19:07:00,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:00,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892524995] [2022-03-03 19:07:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:00,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:00,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:00,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892524995] [2022-03-03 19:07:00,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892524995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:00,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476629097] [2022-03-03 19:07:00,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:07:00,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:00,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:00,323 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) [2022-03-03 19:07:00,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-03 19:07:00,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:07:00,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:00,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:00,389 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 23 treesize of output 19 [2022-03-03 19:07:00,473 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 35 [2022-03-03 19:07:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:00,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:01,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:01,184 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 131 treesize of output 121 [2022-03-03 19:07:01,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:01,384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-03-03 19:07:01,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:01,389 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 66 treesize of output 57 [2022-03-03 19:07:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:01,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476629097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:01,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:01,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:07:01,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133096920] [2022-03-03 19:07:01,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:01,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:07:01,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:01,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:07:01,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:07:01,481 INFO L87 Difference]: Start difference. First operand 1732 states and 5746 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:01,935 INFO L93 Difference]: Finished difference Result 1869 states and 6123 transitions. [2022-03-03 19:07:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:07:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:01,938 INFO L225 Difference]: With dead ends: 1869 [2022-03-03 19:07:01,938 INFO L226 Difference]: Without dead ends: 1799 [2022-03-03 19:07:01,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:07:01,939 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:01,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 221 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:07:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-03-03 19:07:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1733. [2022-03-03 19:07:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 3.3204387990762125) internal successors, (5751), 1732 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 5751 transitions. [2022-03-03 19:07:01,958 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 5751 transitions. Word has length 24 [2022-03-03 19:07:01,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:01,958 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 5751 transitions. [2022-03-03 19:07:01,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:01,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 5751 transitions. [2022-03-03 19:07:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:01,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:01,961 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:01,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:02,163 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,SelfDestructingSolverStorable245 [2022-03-03 19:07:02,163 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:02,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1471336843, now seen corresponding path program 231 times [2022-03-03 19:07:02,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:02,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529610865] [2022-03-03 19:07:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:02,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:02,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:02,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529610865] [2022-03-03 19:07:02,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529610865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:02,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875924426] [2022-03-03 19:07:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:07:02,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:02,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:02,420 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) [2022-03-03 19:07:02,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-03 19:07:02,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:07:02,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:02,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:02,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:02,527 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 [2022-03-03 19:07:02,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:02,582 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 42 treesize of output 36 [2022-03-03 19:07:02,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:02,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:07:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:02,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:03,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:03,383 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 131 treesize of output 121 [2022-03-03 19:07:03,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:03,602 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 83 treesize of output 74 [2022-03-03 19:07:03,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:03,607 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 65 treesize of output 56 [2022-03-03 19:07:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:03,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875924426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:03,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:03,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:03,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255307037] [2022-03-03 19:07:03,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:03,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:03,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:03,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:03,711 INFO L87 Difference]: Start difference. First operand 1733 states and 5751 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:04,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:04,255 INFO L93 Difference]: Finished difference Result 1861 states and 6101 transitions. [2022-03-03 19:07:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:07:04,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:04,258 INFO L225 Difference]: With dead ends: 1861 [2022-03-03 19:07:04,258 INFO L226 Difference]: Without dead ends: 1795 [2022-03-03 19:07:04,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:07:04,258 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:04,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 183 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 641 Invalid, 0 Unknown, 5 Unchecked, 0.3s Time] [2022-03-03 19:07:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-03-03 19:07:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1733. [2022-03-03 19:07:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 3.3204387990762125) internal successors, (5751), 1732 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 5751 transitions. [2022-03-03 19:07:04,277 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 5751 transitions. Word has length 24 [2022-03-03 19:07:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:04,278 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 5751 transitions. [2022-03-03 19:07:04,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 5751 transitions. [2022-03-03 19:07:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:04,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:04,280 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:04,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-03 19:07:04,480 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,SelfDestructingSolverStorable246 [2022-03-03 19:07:04,480 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1660055505, now seen corresponding path program 232 times [2022-03-03 19:07:04,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:04,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627133690] [2022-03-03 19:07:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:04,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:04,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:04,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627133690] [2022-03-03 19:07:04,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627133690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:04,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093993658] [2022-03-03 19:07:04,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:07:04,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:04,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:04,721 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) [2022-03-03 19:07:04,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-03 19:07:04,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:07:04,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:04,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:04,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:04,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:04,860 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 [2022-03-03 19:07:04,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:04,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:07:04,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:04,976 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 37 treesize of output 21 [2022-03-03 19:07:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:05,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:05,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:05,555 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 103 treesize of output 97 [2022-03-03 19:07:05,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:05,794 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 152 treesize of output 132 [2022-03-03 19:07:05,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:05,799 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 104 [2022-03-03 19:07:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:05,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093993658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:05,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:05,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:05,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439965603] [2022-03-03 19:07:05,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:05,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:05,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:05,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:05,922 INFO L87 Difference]: Start difference. First operand 1733 states and 5751 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:06,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:06,442 INFO L93 Difference]: Finished difference Result 1937 states and 6260 transitions. [2022-03-03 19:07:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:07:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:06,446 INFO L225 Difference]: With dead ends: 1937 [2022-03-03 19:07:06,446 INFO L226 Difference]: Without dead ends: 1863 [2022-03-03 19:07:06,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:07:06,446 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:06,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 242 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 562 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-03-03 19:07:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2022-03-03 19:07:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1737. [2022-03-03 19:07:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 3.3202764976958523) internal successors, (5764), 1736 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 5764 transitions. [2022-03-03 19:07:06,466 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 5764 transitions. Word has length 24 [2022-03-03 19:07:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:06,466 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 5764 transitions. [2022-03-03 19:07:06,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 5764 transitions. [2022-03-03 19:07:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:06,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:06,469 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:06,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-03 19:07:06,669 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,SelfDestructingSolverStorable247 [2022-03-03 19:07:06,669 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:06,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1443307217, now seen corresponding path program 233 times [2022-03-03 19:07:06,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:06,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433637131] [2022-03-03 19:07:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:06,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:06,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:06,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433637131] [2022-03-03 19:07:06,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433637131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:06,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702780714] [2022-03-03 19:07:06,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:07:06,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:06,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:06,852 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) [2022-03-03 19:07:06,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-03 19:07:06,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:07:06,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:06,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:06,957 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 [2022-03-03 19:07:07,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:07,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:07:07,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:07,070 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 48 treesize of output 28 [2022-03-03 19:07:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:07,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:07,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:07,665 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 129 treesize of output 119 [2022-03-03 19:07:07,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:07,825 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-03 19:07:07,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:07,830 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2022-03-03 19:07:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:07,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702780714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:07,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:07,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:07:07,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053829958] [2022-03-03 19:07:07,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:07,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:07:07,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:07:07,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:07:07,934 INFO L87 Difference]: Start difference. First operand 1737 states and 5764 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2022-03-03 19:07:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:08,471 INFO L93 Difference]: Finished difference Result 1883 states and 6133 transitions. [2022-03-03 19:07:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:07:08,471 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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 24 [2022-03-03 19:07:08,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:08,474 INFO L225 Difference]: With dead ends: 1883 [2022-03-03 19:07:08,474 INFO L226 Difference]: Without dead ends: 1813 [2022-03-03 19:07:08,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:07:08,475 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:08,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 213 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 610 Invalid, 0 Unknown, 221 Unchecked, 0.3s Time] [2022-03-03 19:07:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-03-03 19:07:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1732. [2022-03-03 19:07:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 3.3194685153090697) internal successors, (5746), 1731 states have internal predecessors, (5746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 5746 transitions. [2022-03-03 19:07:08,494 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 5746 transitions. Word has length 24 [2022-03-03 19:07:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:08,494 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 5746 transitions. [2022-03-03 19:07:08,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2022-03-03 19:07:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 5746 transitions. [2022-03-03 19:07:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:08,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:08,496 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:08,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:08,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:08,696 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:08,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1026952223, now seen corresponding path program 234 times [2022-03-03 19:07:08,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:08,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109353259] [2022-03-03 19:07:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:08,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:08,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109353259] [2022-03-03 19:07:08,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109353259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:08,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9937589] [2022-03-03 19:07:08,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:07:08,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:08,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:08,867 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) [2022-03-03 19:07:08,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-03 19:07:08,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:07:08,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:08,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:08,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:08,940 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 35 [2022-03-03 19:07:09,043 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 22 [2022-03-03 19:07:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:09,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:09,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:09,540 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 83 treesize of output 74 [2022-03-03 19:07:09,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:09,637 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 34 treesize of output 36 [2022-03-03 19:07:09,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:09,641 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 30 [2022-03-03 19:07:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:09,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9937589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:09,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:09,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:07:09,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729530198] [2022-03-03 19:07:09,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:09,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:07:09,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:09,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:07:09,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:07:09,695 INFO L87 Difference]: Start difference. First operand 1732 states and 5746 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:10,670 INFO L93 Difference]: Finished difference Result 2011 states and 6530 transitions. [2022-03-03 19:07:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:07:10,671 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:10,674 INFO L225 Difference]: With dead ends: 2011 [2022-03-03 19:07:10,674 INFO L226 Difference]: Without dead ends: 1898 [2022-03-03 19:07:10,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:07:10,674 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 146 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:10,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 204 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:07:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-03-03 19:07:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1746. [2022-03-03 19:07:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.32378223495702) internal successors, (5800), 1745 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5800 transitions. [2022-03-03 19:07:10,695 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5800 transitions. Word has length 24 [2022-03-03 19:07:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:10,695 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 5800 transitions. [2022-03-03 19:07:10,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5800 transitions. [2022-03-03 19:07:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:10,697 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:10,698 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:10,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-03-03 19:07:10,898 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,SelfDestructingSolverStorable249 [2022-03-03 19:07:10,898 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash 136980951, now seen corresponding path program 235 times [2022-03-03 19:07:10,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:10,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983886624] [2022-03-03 19:07:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:10,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:11,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:11,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983886624] [2022-03-03 19:07:11,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983886624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:11,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148763113] [2022-03-03 19:07:11,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:07:11,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:11,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:11,060 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) [2022-03-03 19:07:11,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-03 19:07:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:11,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:11,136 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 35 [2022-03-03 19:07:11,217 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 41 [2022-03-03 19:07:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:11,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:11,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:11,814 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:07:11,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:11,944 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 34 treesize of output 36 [2022-03-03 19:07:11,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:11,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 30 [2022-03-03 19:07:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:11,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148763113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:11,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:11,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:07:11,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066106544] [2022-03-03 19:07:11,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:11,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:07:11,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:07:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:07:11,987 INFO L87 Difference]: Start difference. First operand 1746 states and 5800 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:12,888 INFO L93 Difference]: Finished difference Result 2069 states and 6696 transitions. [2022-03-03 19:07:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:07:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:12,892 INFO L225 Difference]: With dead ends: 2069 [2022-03-03 19:07:12,892 INFO L226 Difference]: Without dead ends: 1968 [2022-03-03 19:07:12,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:07:12,892 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:12,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 309 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:07:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-03-03 19:07:12,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1745. [2022-03-03 19:07:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 3.322821100917431) internal successors, (5795), 1744 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 5795 transitions. [2022-03-03 19:07:12,914 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 5795 transitions. Word has length 24 [2022-03-03 19:07:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:12,914 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 5795 transitions. [2022-03-03 19:07:12,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 5795 transitions. [2022-03-03 19:07:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:12,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:12,916 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:12,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:13,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:13,117 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:13,117 INFO L85 PathProgramCache]: Analyzing trace with hash -937632607, now seen corresponding path program 236 times [2022-03-03 19:07:13,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:13,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647399970] [2022-03-03 19:07:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:13,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:13,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:13,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647399970] [2022-03-03 19:07:13,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647399970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:13,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187837471] [2022-03-03 19:07:13,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:07:13,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:13,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:13,304 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) [2022-03-03 19:07:13,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-03 19:07:13,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:07:13,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:13,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:13,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:13,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:13,410 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 41 treesize of output 35 [2022-03-03 19:07:13,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:13,538 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 26 treesize of output 22 [2022-03-03 19:07:13,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:13,540 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 12 treesize of output 3 [2022-03-03 19:07:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:13,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:14,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:14,187 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2022-03-03 19:07:14,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:14,273 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-03 19:07:14,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:14,277 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-03 19:07:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:14,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187837471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:14,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:14,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:14,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319761853] [2022-03-03 19:07:14,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:14,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:14,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:14,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:14,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:14,326 INFO L87 Difference]: Start difference. First operand 1745 states and 5795 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:14,893 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2022-03-03 19:07:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:07:14,893 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:14,896 INFO L225 Difference]: With dead ends: 2000 [2022-03-03 19:07:14,896 INFO L226 Difference]: Without dead ends: 1893 [2022-03-03 19:07:14,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:07:14,897 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 135 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:14,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 213 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 663 Invalid, 0 Unknown, 183 Unchecked, 0.3s Time] [2022-03-03 19:07:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2022-03-03 19:07:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1748. [2022-03-03 19:07:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.3234115626788783) internal successors, (5806), 1747 states have internal predecessors, (5806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5806 transitions. [2022-03-03 19:07:14,918 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5806 transitions. Word has length 24 [2022-03-03 19:07:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:14,918 INFO L470 AbstractCegarLoop]: Abstraction has 1748 states and 5806 transitions. [2022-03-03 19:07:14,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5806 transitions. [2022-03-03 19:07:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:14,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:14,920 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:14,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-03-03 19:07:15,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:15,121 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash 420654035, now seen corresponding path program 237 times [2022-03-03 19:07:15,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:15,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111916598] [2022-03-03 19:07:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:15,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:15,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111916598] [2022-03-03 19:07:15,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111916598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:15,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838073984] [2022-03-03 19:07:15,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:07:15,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:15,286 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) [2022-03-03 19:07:15,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-03 19:07:15,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:07:15,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:15,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:15,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:15,393 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 [2022-03-03 19:07:15,441 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 41 [2022-03-03 19:07:15,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:15,443 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 37 treesize of output 21 [2022-03-03 19:07:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:15,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:16,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:16,142 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:07:16,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:16,320 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 34 treesize of output 36 [2022-03-03 19:07:16,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:16,324 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-03 19:07:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:16,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838073984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:16,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:16,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:07:16,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370476610] [2022-03-03 19:07:16,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:16,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:07:16,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:16,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:07:16,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:07:16,374 INFO L87 Difference]: Start difference. First operand 1748 states and 5806 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:07:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:17,451 INFO L93 Difference]: Finished difference Result 2282 states and 7242 transitions. [2022-03-03 19:07:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:07:17,452 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:07:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:17,456 INFO L225 Difference]: With dead ends: 2282 [2022-03-03 19:07:17,456 INFO L226 Difference]: Without dead ends: 2150 [2022-03-03 19:07:17,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:07:17,456 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:17,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 348 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:07:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2022-03-03 19:07:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1753. [2022-03-03 19:07:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.32648401826484) internal successors, (5828), 1752 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5828 transitions. [2022-03-03 19:07:17,479 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5828 transitions. Word has length 24 [2022-03-03 19:07:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:17,479 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 5828 transitions. [2022-03-03 19:07:17,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:07:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5828 transitions. [2022-03-03 19:07:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:17,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:17,482 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:17,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:17,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:17,682 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:17,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1450083629, now seen corresponding path program 238 times [2022-03-03 19:07:17,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:17,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129302452] [2022-03-03 19:07:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:17,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:17,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:17,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129302452] [2022-03-03 19:07:17,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129302452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:17,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055586754] [2022-03-03 19:07:17,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:07:17,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:17,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:17,845 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) [2022-03-03 19:07:17,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-03 19:07:17,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:07:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:17,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:07:17,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:17,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:17,944 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 41 treesize of output 35 [2022-03-03 19:07:17,995 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 41 [2022-03-03 19:07:17,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:17,998 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 37 treesize of output 21 [2022-03-03 19:07:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:18,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:18,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:18,951 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 113 treesize of output 99 [2022-03-03 19:07:19,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:19,076 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 56 treesize of output 54 [2022-03-03 19:07:19,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:19,079 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 46 treesize of output 44 [2022-03-03 19:07:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:19,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055586754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:19,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:19,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:07:19,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169324514] [2022-03-03 19:07:19,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:19,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:07:19,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:07:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:07:19,116 INFO L87 Difference]: Start difference. First operand 1753 states and 5828 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:07:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:20,322 INFO L93 Difference]: Finished difference Result 2591 states and 8060 transitions. [2022-03-03 19:07:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:07:20,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:07:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:20,327 INFO L225 Difference]: With dead ends: 2591 [2022-03-03 19:07:20,327 INFO L226 Difference]: Without dead ends: 2438 [2022-03-03 19:07:20,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:07:20,327 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 163 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:20,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 384 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:07:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-03-03 19:07:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1757. [2022-03-03 19:07:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1756 states have (on average 3.3314350797266514) internal successors, (5850), 1756 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 5850 transitions. [2022-03-03 19:07:20,353 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 5850 transitions. Word has length 24 [2022-03-03 19:07:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:20,353 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 5850 transitions. [2022-03-03 19:07:20,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:07:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 5850 transitions. [2022-03-03 19:07:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:20,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:20,356 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:20,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-03-03 19:07:20,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:20,556 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash -532358289, now seen corresponding path program 239 times [2022-03-03 19:07:20,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:20,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456378420] [2022-03-03 19:07:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:20,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:20,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:20,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456378420] [2022-03-03 19:07:20,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456378420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:20,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321929615] [2022-03-03 19:07:20,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:07:20,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:20,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:20,730 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) [2022-03-03 19:07:20,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-03 19:07:20,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:07:20,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:20,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:20,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:20,861 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 [2022-03-03 19:07:20,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:20,997 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 26 treesize of output 22 [2022-03-03 19:07:21,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:21,000 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 12 treesize of output 3 [2022-03-03 19:07:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:21,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:21,647 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:07:21,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:21,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:07:21,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:21,790 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 30 treesize of output 32 [2022-03-03 19:07:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:21,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321929615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:21,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:21,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:21,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94752803] [2022-03-03 19:07:21,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:21,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:21,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:21,836 INFO L87 Difference]: Start difference. First operand 1757 states and 5850 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:22,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:22,101 INFO L93 Difference]: Finished difference Result 1900 states and 6266 transitions. [2022-03-03 19:07:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:07:22,101 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:22,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:22,104 INFO L225 Difference]: With dead ends: 1900 [2022-03-03 19:07:22,104 INFO L226 Difference]: Without dead ends: 1862 [2022-03-03 19:07:22,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:07:22,105 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:22,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 195 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 509 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-03-03 19:07:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2022-03-03 19:07:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1751. [2022-03-03 19:07:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.322285714285714) internal successors, (5814), 1750 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 5814 transitions. [2022-03-03 19:07:22,125 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 5814 transitions. Word has length 24 [2022-03-03 19:07:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:22,125 INFO L470 AbstractCegarLoop]: Abstraction has 1751 states and 5814 transitions. [2022-03-03 19:07:22,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 5814 transitions. [2022-03-03 19:07:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:22,127 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:22,127 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:22,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-03 19:07:22,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:22,330 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash -825790111, now seen corresponding path program 240 times [2022-03-03 19:07:22,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:22,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637790590] [2022-03-03 19:07:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:22,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:22,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637790590] [2022-03-03 19:07:22,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637790590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:22,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541595451] [2022-03-03 19:07:22,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:07:22,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:22,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:22,464 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) [2022-03-03 19:07:22,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-03 19:07:22,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:07:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:22,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:22,570 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 [2022-03-03 19:07:22,678 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 [2022-03-03 19:07:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:22,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:23,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:23,123 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 141 treesize of output 121 [2022-03-03 19:07:23,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:23,294 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 36 treesize of output 38 [2022-03-03 19:07:23,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:23,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:07:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:23,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541595451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:23,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:23,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 19:07:23,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342506511] [2022-03-03 19:07:23,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:23,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:07:23,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:07:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:07:23,342 INFO L87 Difference]: Start difference. First operand 1751 states and 5814 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-03-03 19:07:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:23,764 INFO L93 Difference]: Finished difference Result 1848 states and 6080 transitions. [2022-03-03 19:07:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:07:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 24 [2022-03-03 19:07:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:23,768 INFO L225 Difference]: With dead ends: 1848 [2022-03-03 19:07:23,769 INFO L226 Difference]: Without dead ends: 1829 [2022-03-03 19:07:23,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:23,769 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:23,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 199 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:07:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-03-03 19:07:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1748. [2022-03-03 19:07:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.321121923297081) internal successors, (5802), 1747 states have internal predecessors, (5802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5802 transitions. [2022-03-03 19:07:23,790 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5802 transitions. Word has length 24 [2022-03-03 19:07:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:23,790 INFO L470 AbstractCegarLoop]: Abstraction has 1748 states and 5802 transitions. [2022-03-03 19:07:23,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-03-03 19:07:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5802 transitions. [2022-03-03 19:07:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:23,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:23,793 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:23,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:23,995 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,SelfDestructingSolverStorable255 [2022-03-03 19:07:23,995 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:23,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:23,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2136973911, now seen corresponding path program 241 times [2022-03-03 19:07:23,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:23,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419085386] [2022-03-03 19:07:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:23,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:24,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:24,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419085386] [2022-03-03 19:07:24,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419085386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:24,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221083337] [2022-03-03 19:07:24,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:07:24,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:24,149 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) [2022-03-03 19:07:24,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-03 19:07:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:07:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:24,308 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 23 treesize of output 19 [2022-03-03 19:07:24,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:24,347 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 [2022-03-03 19:07:24,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:24,350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:07:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:24,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:24,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:24,810 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-03 19:07:25,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:25,022 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 54 treesize of output 52 [2022-03-03 19:07:25,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:25,026 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-03 19:07:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:25,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221083337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:25,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:25,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:25,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838746947] [2022-03-03 19:07:25,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:25,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:25,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:25,065 INFO L87 Difference]: Start difference. First operand 1748 states and 5802 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:25,962 INFO L93 Difference]: Finished difference Result 2093 states and 6721 transitions. [2022-03-03 19:07:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:07:25,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:25,966 INFO L225 Difference]: With dead ends: 2093 [2022-03-03 19:07:25,966 INFO L226 Difference]: Without dead ends: 1940 [2022-03-03 19:07:25,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:07:25,966 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 139 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:25,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 274 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 896 Invalid, 0 Unknown, 150 Unchecked, 0.4s Time] [2022-03-03 19:07:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-03-03 19:07:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1755. [2022-03-03 19:07:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 3.3238312428734322) internal successors, (5830), 1754 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5830 transitions. [2022-03-03 19:07:25,987 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5830 transitions. Word has length 24 [2022-03-03 19:07:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:25,987 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 5830 transitions. [2022-03-03 19:07:25,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5830 transitions. [2022-03-03 19:07:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:25,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:25,989 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:26,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-03-03 19:07:26,189 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,SelfDestructingSolverStorable256 [2022-03-03 19:07:26,190 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:26,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1571077783, now seen corresponding path program 242 times [2022-03-03 19:07:26,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:26,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550996311] [2022-03-03 19:07:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:26,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:26,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:26,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550996311] [2022-03-03 19:07:26,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550996311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:26,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550839696] [2022-03-03 19:07:26,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:07:26,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:26,306 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) [2022-03-03 19:07:26,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-03 19:07:26,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:07:26,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:26,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:26,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:26,414 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 19 treesize of output 15 [2022-03-03 19:07:26,458 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 [2022-03-03 19:07:26,460 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 [2022-03-03 19:07:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:26,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:26,811 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 141 treesize of output 121 [2022-03-03 19:07:27,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:27,053 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-03 19:07:27,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:27,057 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 28 treesize of output 30 [2022-03-03 19:07:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:27,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550839696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:27,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:27,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:07:27,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744457950] [2022-03-03 19:07:27,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:27,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:07:27,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:27,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:07:27,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:07:27,098 INFO L87 Difference]: Start difference. First operand 1755 states and 5830 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:07:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:27,298 INFO L93 Difference]: Finished difference Result 1828 states and 6014 transitions. [2022-03-03 19:07:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:07:27,299 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 24 [2022-03-03 19:07:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:27,301 INFO L225 Difference]: With dead ends: 1828 [2022-03-03 19:07:27,301 INFO L226 Difference]: Without dead ends: 1821 [2022-03-03 19:07:27,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:07:27,302 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:27,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 158 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 451 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-03-03 19:07:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2022-03-03 19:07:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1771. [2022-03-03 19:07:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1770 states have (on average 3.3163841807909606) internal successors, (5870), 1770 states have internal predecessors, (5870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 5870 transitions. [2022-03-03 19:07:27,321 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 5870 transitions. Word has length 24 [2022-03-03 19:07:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:27,321 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 5870 transitions. [2022-03-03 19:07:27,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:07:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 5870 transitions. [2022-03-03 19:07:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:27,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:27,323 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:27,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:27,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-03 19:07:27,524 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1179524073, now seen corresponding path program 243 times [2022-03-03 19:07:27,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:27,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506343666] [2022-03-03 19:07:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:27,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:27,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:27,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506343666] [2022-03-03 19:07:27,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506343666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:27,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076971068] [2022-03-03 19:07:27,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:07:27,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:27,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:27,642 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) [2022-03-03 19:07:27,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-03 19:07:27,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:07:27,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:27,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:27,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:27,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-03 19:07:27,783 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 [2022-03-03 19:07:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:27,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:28,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:28,177 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 70 [2022-03-03 19:07:28,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:28,336 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 34 treesize of output 36 [2022-03-03 19:07:28,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:28,340 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 28 treesize of output 30 [2022-03-03 19:07:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:28,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076971068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:28,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:28,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:07:28,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276559012] [2022-03-03 19:07:28,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:28,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:07:28,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:28,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:07:28,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:07:28,382 INFO L87 Difference]: Start difference. First operand 1771 states and 5870 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:07:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:28,707 INFO L93 Difference]: Finished difference Result 1830 states and 5999 transitions. [2022-03-03 19:07:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:07:28,707 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 24 [2022-03-03 19:07:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:28,710 INFO L225 Difference]: With dead ends: 1830 [2022-03-03 19:07:28,710 INFO L226 Difference]: Without dead ends: 1766 [2022-03-03 19:07:28,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:07:28,710 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:28,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 168 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:07:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2022-03-03 19:07:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1752. [2022-03-03 19:07:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.320959451741862) internal successors, (5815), 1751 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5815 transitions. [2022-03-03 19:07:28,729 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5815 transitions. Word has length 24 [2022-03-03 19:07:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:28,729 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5815 transitions. [2022-03-03 19:07:28,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2022-03-03 19:07:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5815 transitions. [2022-03-03 19:07:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:28,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:28,732 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:28,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:28,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:28,932 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1555213131, now seen corresponding path program 244 times [2022-03-03 19:07:28,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:28,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518705520] [2022-03-03 19:07:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:28,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:29,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:29,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518705520] [2022-03-03 19:07:29,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518705520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:29,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145348655] [2022-03-03 19:07:29,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:07:29,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:29,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:29,207 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) [2022-03-03 19:07:29,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-03 19:07:29,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:07:29,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:29,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:07:29,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:29,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:29,321 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 41 treesize of output 35 [2022-03-03 19:07:29,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:29,480 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-03 19:07:29,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:29,483 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 37 treesize of output 21 [2022-03-03 19:07:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:29,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:30,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:30,307 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 110 treesize of output 98 [2022-03-03 19:07:30,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:30,457 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 58 treesize of output 56 [2022-03-03 19:07:30,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:30,461 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 48 treesize of output 46 [2022-03-03 19:07:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:30,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145348655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:30,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:30,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:30,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898034530] [2022-03-03 19:07:30,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:30,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:30,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:30,508 INFO L87 Difference]: Start difference. First operand 1752 states and 5815 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:32,029 INFO L93 Difference]: Finished difference Result 2486 states and 7729 transitions. [2022-03-03 19:07:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:07:32,029 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:32,033 INFO L225 Difference]: With dead ends: 2486 [2022-03-03 19:07:32,033 INFO L226 Difference]: Without dead ends: 2313 [2022-03-03 19:07:32,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:07:32,033 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 303 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:32,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 323 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 890 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2022-03-03 19:07:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-03-03 19:07:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1756. [2022-03-03 19:07:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 3.3213675213675216) internal successors, (5829), 1755 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5829 transitions. [2022-03-03 19:07:32,065 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5829 transitions. Word has length 24 [2022-03-03 19:07:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:32,065 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 5829 transitions. [2022-03-03 19:07:32,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5829 transitions. [2022-03-03 19:07:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:32,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:32,068 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:32,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-03-03 19:07:32,268 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,SelfDestructingSolverStorable259 [2022-03-03 19:07:32,268 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash 982288367, now seen corresponding path program 245 times [2022-03-03 19:07:32,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:32,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351229016] [2022-03-03 19:07:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:32,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:32,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:32,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351229016] [2022-03-03 19:07:32,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351229016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:32,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135634835] [2022-03-03 19:07:32,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:07:32,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:32,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:32,497 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) [2022-03-03 19:07:32,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-03 19:07:32,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:07:32,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:32,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:32,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:32,595 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 35 [2022-03-03 19:07:32,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:32,644 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 43 treesize of output 37 [2022-03-03 19:07:32,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:32,647 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 37 treesize of output 21 [2022-03-03 19:07:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:32,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:33,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:33,282 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 72 treesize of output 65 [2022-03-03 19:07:33,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:33,379 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 34 treesize of output 36 [2022-03-03 19:07:33,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:33,382 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-03 19:07:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:33,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135634835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:33,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:33,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:33,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623809077] [2022-03-03 19:07:33,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:33,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:33,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:33,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:33,429 INFO L87 Difference]: Start difference. First operand 1756 states and 5829 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:34,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:34,021 INFO L93 Difference]: Finished difference Result 1860 states and 6127 transitions. [2022-03-03 19:07:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:07:34,022 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:34,025 INFO L225 Difference]: With dead ends: 1860 [2022-03-03 19:07:34,025 INFO L226 Difference]: Without dead ends: 1829 [2022-03-03 19:07:34,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:07:34,025 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 80 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:34,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 220 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 761 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-03-03 19:07:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-03-03 19:07:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1753. [2022-03-03 19:07:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.3213470319634704) internal successors, (5819), 1752 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5819 transitions. [2022-03-03 19:07:34,044 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5819 transitions. Word has length 24 [2022-03-03 19:07:34,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:34,044 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 5819 transitions. [2022-03-03 19:07:34,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:34,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5819 transitions. [2022-03-03 19:07:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:34,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:34,047 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:34,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-03-03 19:07:34,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-03-03 19:07:34,247 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1439692417, now seen corresponding path program 246 times [2022-03-03 19:07:34,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:34,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649260514] [2022-03-03 19:07:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:34,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:34,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:34,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649260514] [2022-03-03 19:07:34,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649260514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:34,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737519719] [2022-03-03 19:07:34,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:07:34,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:34,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:34,441 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) [2022-03-03 19:07:34,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-03 19:07:34,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:07:34,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:34,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:07:34,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:34,540 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 35 [2022-03-03 19:07:34,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:34,647 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 24 treesize of output 20 [2022-03-03 19:07:34,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:34,649 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 12 treesize of output 3 [2022-03-03 19:07:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:34,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:35,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:35,364 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 102 treesize of output 90 [2022-03-03 19:07:35,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:35,483 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-03 19:07:35,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:35,486 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 38 treesize of output 38 [2022-03-03 19:07:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:35,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737519719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:35,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:35,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:35,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980602182] [2022-03-03 19:07:35,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:35,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:35,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:35,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:35,525 INFO L87 Difference]: Start difference. First operand 1753 states and 5819 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:36,456 INFO L93 Difference]: Finished difference Result 2224 states and 7069 transitions. [2022-03-03 19:07:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:07:36,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:36,460 INFO L225 Difference]: With dead ends: 2224 [2022-03-03 19:07:36,460 INFO L226 Difference]: Without dead ends: 2051 [2022-03-03 19:07:36,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:07:36,460 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 179 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:36,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 328 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 944 Invalid, 0 Unknown, 179 Unchecked, 0.4s Time] [2022-03-03 19:07:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2022-03-03 19:07:36,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1760. [2022-03-03 19:07:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 3.3240477544059126) internal successors, (5847), 1759 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5847 transitions. [2022-03-03 19:07:36,481 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5847 transitions. Word has length 24 [2022-03-03 19:07:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:36,481 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 5847 transitions. [2022-03-03 19:07:36,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5847 transitions. [2022-03-03 19:07:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:36,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:36,484 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:36,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-03-03 19:07:36,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:36,684 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:36,684 INFO L85 PathProgramCache]: Analyzing trace with hash -108871757, now seen corresponding path program 247 times [2022-03-03 19:07:36,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:36,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495753376] [2022-03-03 19:07:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:36,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:36,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:36,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495753376] [2022-03-03 19:07:36,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495753376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:36,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050482623] [2022-03-03 19:07:36,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:07:36,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:36,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:36,858 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) [2022-03-03 19:07:36,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-03 19:07:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:36,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:36,957 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 35 [2022-03-03 19:07:37,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:37,207 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 23 [2022-03-03 19:07:37,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:37,209 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 25 treesize of output 17 [2022-03-03 19:07:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:37,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:37,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:37,863 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 141 treesize of output 121 [2022-03-03 19:07:38,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:38,045 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 36 treesize of output 38 [2022-03-03 19:07:38,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:38,048 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 30 treesize of output 32 [2022-03-03 19:07:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:38,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050482623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:38,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:38,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:38,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123626104] [2022-03-03 19:07:38,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:38,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:38,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:38,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:38,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:38,090 INFO L87 Difference]: Start difference. First operand 1760 states and 5847 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:38,346 INFO L93 Difference]: Finished difference Result 1841 states and 6055 transitions. [2022-03-03 19:07:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:07:38,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:38,349 INFO L225 Difference]: With dead ends: 1841 [2022-03-03 19:07:38,349 INFO L226 Difference]: Without dead ends: 1810 [2022-03-03 19:07:38,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:38,349 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:38,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 271 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 630 Invalid, 0 Unknown, 350 Unchecked, 0.2s Time] [2022-03-03 19:07:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-03-03 19:07:38,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1753. [2022-03-03 19:07:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.3213470319634704) internal successors, (5819), 1752 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5819 transitions. [2022-03-03 19:07:38,368 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5819 transitions. Word has length 24 [2022-03-03 19:07:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:38,368 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 5819 transitions. [2022-03-03 19:07:38,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5819 transitions. [2022-03-03 19:07:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:38,370 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:38,370 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:38,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:38,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:38,571 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash -593274527, now seen corresponding path program 248 times [2022-03-03 19:07:38,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:38,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844662275] [2022-03-03 19:07:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:38,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:38,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844662275] [2022-03-03 19:07:38,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844662275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:38,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459984153] [2022-03-03 19:07:38,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:07:38,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:38,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:38,744 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) [2022-03-03 19:07:38,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-03 19:07:38,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:07:38,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:38,847 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 35 [2022-03-03 19:07:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:38,997 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 43 treesize of output 37 [2022-03-03 19:07:38,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:38,999 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 37 treesize of output 21 [2022-03-03 19:07:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:39,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:39,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:39,556 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:07:39,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:39,679 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 36 treesize of output 38 [2022-03-03 19:07:39,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:39,683 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 30 treesize of output 32 [2022-03-03 19:07:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:39,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459984153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:39,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:39,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:39,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888083354] [2022-03-03 19:07:39,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:39,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:39,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:39,728 INFO L87 Difference]: Start difference. First operand 1753 states and 5819 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:40,217 INFO L93 Difference]: Finished difference Result 1866 states and 6128 transitions. [2022-03-03 19:07:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:07:40,218 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:40,220 INFO L225 Difference]: With dead ends: 1866 [2022-03-03 19:07:40,220 INFO L226 Difference]: Without dead ends: 1831 [2022-03-03 19:07:40,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:07:40,221 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:40,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 268 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 903 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-03-03 19:07:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-03-03 19:07:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1753. [2022-03-03 19:07:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.3213470319634704) internal successors, (5819), 1752 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5819 transitions. [2022-03-03 19:07:40,240 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5819 transitions. Word has length 24 [2022-03-03 19:07:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:40,240 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 5819 transitions. [2022-03-03 19:07:40,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5819 transitions. [2022-03-03 19:07:40,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:40,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:40,242 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:40,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-03-03 19:07:40,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:40,443 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:40,443 INFO L85 PathProgramCache]: Analyzing trace with hash 95735659, now seen corresponding path program 249 times [2022-03-03 19:07:40,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:40,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027567666] [2022-03-03 19:07:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:40,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:40,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027567666] [2022-03-03 19:07:40,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027567666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:40,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775734410] [2022-03-03 19:07:40,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:07:40,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:40,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:40,617 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) [2022-03-03 19:07:40,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-03 19:07:40,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:07:40,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:40,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:40,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:40,716 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 35 [2022-03-03 19:07:40,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:40,917 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 29 treesize of output 23 [2022-03-03 19:07:40,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:40,919 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 25 treesize of output 12 [2022-03-03 19:07:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:40,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:41,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:41,431 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 141 treesize of output 121 [2022-03-03 19:07:41,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:41,565 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 34 treesize of output 36 [2022-03-03 19:07:41,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:41,569 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 28 treesize of output 30 [2022-03-03 19:07:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:41,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775734410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:41,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:41,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:41,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396299707] [2022-03-03 19:07:41,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:41,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:41,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:41,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:41,614 INFO L87 Difference]: Start difference. First operand 1753 states and 5819 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:42,032 INFO L93 Difference]: Finished difference Result 1889 states and 6175 transitions. [2022-03-03 19:07:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:07:42,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:42,035 INFO L225 Difference]: With dead ends: 1889 [2022-03-03 19:07:42,035 INFO L226 Difference]: Without dead ends: 1831 [2022-03-03 19:07:42,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:07:42,036 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:42,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 211 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 639 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2022-03-03 19:07:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-03-03 19:07:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1753. [2022-03-03 19:07:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.3213470319634704) internal successors, (5819), 1752 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5819 transitions. [2022-03-03 19:07:42,055 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5819 transitions. Word has length 24 [2022-03-03 19:07:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:42,055 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 5819 transitions. [2022-03-03 19:07:42,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5819 transitions. [2022-03-03 19:07:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:42,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:42,057 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:42,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-03-03 19:07:42,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:42,258 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:42,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1974379607, now seen corresponding path program 250 times [2022-03-03 19:07:42,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:42,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490007004] [2022-03-03 19:07:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:42,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:07:42,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:42,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490007004] [2022-03-03 19:07:42,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490007004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:42,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109964] [2022-03-03 19:07:42,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:07:42,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:42,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:42,515 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) [2022-03-03 19:07:42,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-03 19:07:42,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:07:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:07:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:42,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:42,613 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 23 treesize of output 19 [2022-03-03 19:07:42,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:42,730 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 51 treesize of output 43 [2022-03-03 19:07:42,732 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 15 treesize of output 11 [2022-03-03 19:07:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:42,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:43,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:43,442 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-03 19:07:43,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:43,685 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 113 treesize of output 99 [2022-03-03 19:07:43,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:43,690 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 91 treesize of output 77 [2022-03-03 19:07:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:43,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:43,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:43,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-03-03 19:07:43,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516144767] [2022-03-03 19:07:43,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:43,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:07:43,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:43,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:07:43,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:07:43,778 INFO L87 Difference]: Start difference. First operand 1753 states and 5819 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:44,411 INFO L93 Difference]: Finished difference Result 1923 states and 6290 transitions. [2022-03-03 19:07:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:07:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:44,414 INFO L225 Difference]: With dead ends: 1923 [2022-03-03 19:07:44,414 INFO L226 Difference]: Without dead ends: 1878 [2022-03-03 19:07:44,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:07:44,415 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:44,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 254 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 772 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-03-03 19:07:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-03-03 19:07:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1759. [2022-03-03 19:07:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 3.321956769055745) internal successors, (5840), 1758 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 5840 transitions. [2022-03-03 19:07:44,435 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 5840 transitions. Word has length 24 [2022-03-03 19:07:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:44,435 INFO L470 AbstractCegarLoop]: Abstraction has 1759 states and 5840 transitions. [2022-03-03 19:07:44,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 5840 transitions. [2022-03-03 19:07:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:44,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:44,437 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:44,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-03-03 19:07:44,638 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,SelfDestructingSolverStorable265 [2022-03-03 19:07:44,638 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:44,638 INFO L85 PathProgramCache]: Analyzing trace with hash 809937343, now seen corresponding path program 251 times [2022-03-03 19:07:44,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:44,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628101055] [2022-03-03 19:07:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:44,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:44,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:44,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628101055] [2022-03-03 19:07:44,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628101055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:44,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234099615] [2022-03-03 19:07:44,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:07:44,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:44,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:44,848 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) [2022-03-03 19:07:44,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-03 19:07:44,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:07:44,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:44,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:44,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:44,949 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 23 treesize of output 19 [2022-03-03 19:07:45,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:45,045 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 51 treesize of output 43 [2022-03-03 19:07:45,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:45,048 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 53 treesize of output 33 [2022-03-03 19:07:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:45,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:45,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:45,590 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 120 [2022-03-03 19:07:45,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:45,760 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 81 [2022-03-03 19:07:45,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:45,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 63 [2022-03-03 19:07:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:45,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234099615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:45,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:45,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:45,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105228174] [2022-03-03 19:07:45,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:45,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:45,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:45,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:45,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:45,863 INFO L87 Difference]: Start difference. First operand 1759 states and 5840 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:46,465 INFO L93 Difference]: Finished difference Result 1838 states and 6071 transitions. [2022-03-03 19:07:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:07:46,465 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:46,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:46,469 INFO L225 Difference]: With dead ends: 1838 [2022-03-03 19:07:46,469 INFO L226 Difference]: Without dead ends: 1803 [2022-03-03 19:07:46,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:07:46,469 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:46,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 287 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 828 Invalid, 0 Unknown, 325 Unchecked, 0.3s Time] [2022-03-03 19:07:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-03-03 19:07:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1757. [2022-03-03 19:07:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1756 states have (on average 3.322892938496583) internal successors, (5835), 1756 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 5835 transitions. [2022-03-03 19:07:46,488 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 5835 transitions. Word has length 24 [2022-03-03 19:07:46,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:46,489 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 5835 transitions. [2022-03-03 19:07:46,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:46,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 5835 transitions. [2022-03-03 19:07:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:46,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:46,491 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:46,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-03-03 19:07:46,691 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,SelfDestructingSolverStorable266 [2022-03-03 19:07:46,691 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:46,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:46,692 INFO L85 PathProgramCache]: Analyzing trace with hash -38685129, now seen corresponding path program 252 times [2022-03-03 19:07:46,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:46,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406322975] [2022-03-03 19:07:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:46,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:46,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:46,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406322975] [2022-03-03 19:07:46,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406322975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:46,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186899310] [2022-03-03 19:07:46,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:07:46,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:46,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:46,909 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) [2022-03-03 19:07:46,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-03 19:07:46,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:07:46,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:46,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:46,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:47,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:47,026 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 [2022-03-03 19:07:47,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:47,179 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 55 treesize of output 47 [2022-03-03 19:07:47,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:47,181 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 37 treesize of output 21 [2022-03-03 19:07:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:47,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:47,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:47,713 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-03-03 19:07:47,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:47,951 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 150 treesize of output 130 [2022-03-03 19:07:47,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:47,957 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 122 treesize of output 102 [2022-03-03 19:07:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:48,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186899310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:48,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:48,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:48,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389085465] [2022-03-03 19:07:48,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:48,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:48,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:48,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:48,112 INFO L87 Difference]: Start difference. First operand 1757 states and 5835 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:48,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:48,492 INFO L93 Difference]: Finished difference Result 1829 states and 6032 transitions. [2022-03-03 19:07:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:07:48,493 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:48,496 INFO L225 Difference]: With dead ends: 1829 [2022-03-03 19:07:48,496 INFO L226 Difference]: Without dead ends: 1790 [2022-03-03 19:07:48,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:07:48,496 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:48,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 222 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 639 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2022-03-03 19:07:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-03-03 19:07:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1757. [2022-03-03 19:07:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1756 states have (on average 3.321753986332574) internal successors, (5833), 1756 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 5833 transitions. [2022-03-03 19:07:48,515 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 5833 transitions. Word has length 24 [2022-03-03 19:07:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:48,515 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 5833 transitions. [2022-03-03 19:07:48,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 5833 transitions. [2022-03-03 19:07:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:48,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:48,518 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:48,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-03-03 19:07:48,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:48,718 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2012036845, now seen corresponding path program 253 times [2022-03-03 19:07:48,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:48,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083109913] [2022-03-03 19:07:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:48,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:48,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:48,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083109913] [2022-03-03 19:07:48,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083109913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:48,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106145397] [2022-03-03 19:07:48,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:07:48,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:48,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:48,914 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) [2022-03-03 19:07:48,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-03 19:07:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:48,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:07:48,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:49,031 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 [2022-03-03 19:07:49,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:49,096 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 42 treesize of output 36 [2022-03-03 19:07:49,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:49,099 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 37 treesize of output 21 [2022-03-03 19:07:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:49,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:49,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:49,901 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 133 treesize of output 123 [2022-03-03 19:07:50,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:50,124 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 114 treesize of output 102 [2022-03-03 19:07:50,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:50,129 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 82 [2022-03-03 19:07:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:50,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106145397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:50,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:50,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:07:50,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665006244] [2022-03-03 19:07:50,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:50,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:07:50,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:07:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:07:50,216 INFO L87 Difference]: Start difference. First operand 1757 states and 5833 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:07:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:51,595 INFO L93 Difference]: Finished difference Result 2308 states and 7245 transitions. [2022-03-03 19:07:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:07:51,595 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:07:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:51,599 INFO L225 Difference]: With dead ends: 2308 [2022-03-03 19:07:51,599 INFO L226 Difference]: Without dead ends: 2135 [2022-03-03 19:07:51,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:07:51,600 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 255 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:51,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 210 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 655 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2022-03-03 19:07:51,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2022-03-03 19:07:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1758. [2022-03-03 19:07:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 3.3227091633466137) internal successors, (5838), 1757 states have internal predecessors, (5838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 5838 transitions. [2022-03-03 19:07:51,623 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 5838 transitions. Word has length 24 [2022-03-03 19:07:51,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:51,623 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 5838 transitions. [2022-03-03 19:07:51,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:07:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 5838 transitions. [2022-03-03 19:07:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:51,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:51,632 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:51,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-03-03 19:07:51,832 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,SelfDestructingSolverStorable268 [2022-03-03 19:07:51,832 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 249963507, now seen corresponding path program 254 times [2022-03-03 19:07:51,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:51,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637495565] [2022-03-03 19:07:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:52,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:52,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637495565] [2022-03-03 19:07:52,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637495565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:52,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564417333] [2022-03-03 19:07:52,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:07:52,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:52,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:52,034 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) [2022-03-03 19:07:52,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-03 19:07:52,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:07:52,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:52,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:52,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:52,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:52,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:07:52,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:52,285 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 [2022-03-03 19:07:52,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:52,287 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 37 treesize of output 21 [2022-03-03 19:07:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:52,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:52,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:52,783 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 100 treesize of output 94 [2022-03-03 19:07:53,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:53,030 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 146 treesize of output 126 [2022-03-03 19:07:53,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:53,036 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 118 treesize of output 98 [2022-03-03 19:07:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:53,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564417333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:53,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:53,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:53,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108113381] [2022-03-03 19:07:53,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:53,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:53,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:53,153 INFO L87 Difference]: Start difference. First operand 1758 states and 5838 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:53,588 INFO L93 Difference]: Finished difference Result 1829 states and 6030 transitions. [2022-03-03 19:07:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:07:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:53,591 INFO L225 Difference]: With dead ends: 1829 [2022-03-03 19:07:53,591 INFO L226 Difference]: Without dead ends: 1790 [2022-03-03 19:07:53,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:07:53,592 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:53,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 264 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 686 Invalid, 0 Unknown, 219 Unchecked, 0.3s Time] [2022-03-03 19:07:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-03-03 19:07:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1758. [2022-03-03 19:07:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 3.3227091633466137) internal successors, (5838), 1757 states have internal predecessors, (5838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 5838 transitions. [2022-03-03 19:07:53,610 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 5838 transitions. Word has length 24 [2022-03-03 19:07:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:53,610 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 5838 transitions. [2022-03-03 19:07:53,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 5838 transitions. [2022-03-03 19:07:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:53,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:53,613 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:53,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:53,813 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,SelfDestructingSolverStorable269 [2022-03-03 19:07:53,813 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash -848461897, now seen corresponding path program 255 times [2022-03-03 19:07:53,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:53,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035189592] [2022-03-03 19:07:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:53,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:54,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:54,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035189592] [2022-03-03 19:07:54,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035189592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:54,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892480890] [2022-03-03 19:07:54,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:07:54,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:54,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:54,032 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) [2022-03-03 19:07:54,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-03 19:07:54,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:07:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:54,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:54,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:54,131 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 [2022-03-03 19:07:54,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:54,247 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 42 treesize of output 36 [2022-03-03 19:07:54,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:54,250 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 37 treesize of output 21 [2022-03-03 19:07:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:54,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:54,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:54,828 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 122 [2022-03-03 19:07:55,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:55,056 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 85 treesize of output 76 [2022-03-03 19:07:55,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:55,061 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 67 treesize of output 58 [2022-03-03 19:07:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:55,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892480890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:55,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:55,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:55,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079325467] [2022-03-03 19:07:55,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:55,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:55,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:55,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:55,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:55,160 INFO L87 Difference]: Start difference. First operand 1758 states and 5838 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:55,738 INFO L93 Difference]: Finished difference Result 1909 states and 6197 transitions. [2022-03-03 19:07:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:07:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:55,741 INFO L225 Difference]: With dead ends: 1909 [2022-03-03 19:07:55,741 INFO L226 Difference]: Without dead ends: 1816 [2022-03-03 19:07:55,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:07:55,741 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:55,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 222 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 522 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-03-03 19:07:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2022-03-03 19:07:55,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1758. [2022-03-03 19:07:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 3.3227091633466137) internal successors, (5838), 1757 states have internal predecessors, (5838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 5838 transitions. [2022-03-03 19:07:55,761 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 5838 transitions. Word has length 24 [2022-03-03 19:07:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:55,761 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 5838 transitions. [2022-03-03 19:07:55,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 5838 transitions. [2022-03-03 19:07:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:55,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:55,763 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:55,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-03-03 19:07:55,963 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,SelfDestructingSolverStorable270 [2022-03-03 19:07:55,963 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1606762527, now seen corresponding path program 256 times [2022-03-03 19:07:55,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:55,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692809084] [2022-03-03 19:07:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:55,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:56,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:56,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692809084] [2022-03-03 19:07:56,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692809084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:56,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032010315] [2022-03-03 19:07:56,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:07:56,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:56,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:56,180 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) [2022-03-03 19:07:56,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-03 19:07:56,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:07:56,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:56,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:07:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:56,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 35 [2022-03-03 19:07:56,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:56,355 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 43 treesize of output 37 [2022-03-03 19:07:56,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:56,358 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 37 treesize of output 21 [2022-03-03 19:07:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:56,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:57,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:57,167 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 69 treesize of output 67 [2022-03-03 19:07:57,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:57,271 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-03-03 19:07:57,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:57,276 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-03-03 19:07:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:57,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032010315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:07:57,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:07:57,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:07:57,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863752481] [2022-03-03 19:07:57,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:07:57,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:07:57,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:07:57,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:07:57,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:07:57,351 INFO L87 Difference]: Start difference. First operand 1758 states and 5838 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:07:58,607 INFO L93 Difference]: Finished difference Result 2304 states and 7231 transitions. [2022-03-03 19:07:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:07:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:07:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:07:58,611 INFO L225 Difference]: With dead ends: 2304 [2022-03-03 19:07:58,611 INFO L226 Difference]: Without dead ends: 2100 [2022-03-03 19:07:58,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:07:58,612 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 203 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:07:58,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 297 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 758 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-03-03 19:07:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2022-03-03 19:07:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1765. [2022-03-03 19:07:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 3.324829931972789) internal successors, (5865), 1764 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5865 transitions. [2022-03-03 19:07:58,643 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5865 transitions. Word has length 24 [2022-03-03 19:07:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:07:58,643 INFO L470 AbstractCegarLoop]: Abstraction has 1765 states and 5865 transitions. [2022-03-03 19:07:58,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:07:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5865 transitions. [2022-03-03 19:07:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:07:58,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:07:58,645 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:07:58,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-03 19:07:58,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:58,851 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:07:58,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:07:58,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1722283241, now seen corresponding path program 257 times [2022-03-03 19:07:58,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:07:58,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224743478] [2022-03-03 19:07:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:07:58,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:07:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:07:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:59,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:07:59,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224743478] [2022-03-03 19:07:59,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224743478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:07:59,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450548763] [2022-03-03 19:07:59,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:07:59,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:07:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:07:59,073 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) [2022-03-03 19:07:59,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-03 19:07:59,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:07:59,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:07:59,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:07:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:07:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:59,174 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 41 treesize of output 35 [2022-03-03 19:07:59,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:59,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:07:59,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:07:59,303 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:07:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:07:59,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:07:59,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:07:59,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 76 [2022-03-03 19:08:00,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:00,004 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 84 treesize of output 77 [2022-03-03 19:08:00,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:00,009 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 68 treesize of output 61 [2022-03-03 19:08:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:00,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450548763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:00,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:00,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:00,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611137797] [2022-03-03 19:08:00,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:00,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:00,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:00,128 INFO L87 Difference]: Start difference. First operand 1765 states and 5865 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:00,906 INFO L93 Difference]: Finished difference Result 1928 states and 6322 transitions. [2022-03-03 19:08:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:08:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:00,910 INFO L225 Difference]: With dead ends: 1928 [2022-03-03 19:08:00,910 INFO L226 Difference]: Without dead ends: 1843 [2022-03-03 19:08:00,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:08:00,910 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:00,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 186 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 670 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-03-03 19:08:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-03-03 19:08:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1772. [2022-03-03 19:08:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.3274985883681536) internal successors, (5893), 1771 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 5893 transitions. [2022-03-03 19:08:00,930 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 5893 transitions. Word has length 24 [2022-03-03 19:08:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:00,930 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 5893 transitions. [2022-03-03 19:08:00,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 5893 transitions. [2022-03-03 19:08:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:00,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:00,932 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:00,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-03-03 19:08:01,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:01,133 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1024119881, now seen corresponding path program 258 times [2022-03-03 19:08:01,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:01,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249894456] [2022-03-03 19:08:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:01,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:01,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:01,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249894456] [2022-03-03 19:08:01,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249894456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:01,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026671202] [2022-03-03 19:08:01,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:08:01,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:01,323 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) [2022-03-03 19:08:01,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-03 19:08:01,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:08:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:01,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:08:01,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:01,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 35 [2022-03-03 19:08:01,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:01,669 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-03 19:08:01,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:01,671 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:08:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:01,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:02,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:02,264 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-03-03 19:08:02,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:02,371 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 114 treesize of output 100 [2022-03-03 19:08:02,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:02,376 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 92 treesize of output 78 [2022-03-03 19:08:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:02,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026671202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:02,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:02,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:02,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077483515] [2022-03-03 19:08:02,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:02,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:02,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:02,470 INFO L87 Difference]: Start difference. First operand 1772 states and 5893 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:02,845 INFO L93 Difference]: Finished difference Result 1959 states and 6372 transitions. [2022-03-03 19:08:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:08:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:02,848 INFO L225 Difference]: With dead ends: 1959 [2022-03-03 19:08:02,848 INFO L226 Difference]: Without dead ends: 1867 [2022-03-03 19:08:02,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:08:02,849 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:02,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 258 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 683 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-03-03 19:08:02,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2022-03-03 19:08:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1800. [2022-03-03 19:08:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.3162868260144527) internal successors, (5966), 1799 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5966 transitions. [2022-03-03 19:08:02,869 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5966 transitions. Word has length 24 [2022-03-03 19:08:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:02,869 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 5966 transitions. [2022-03-03 19:08:02,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5966 transitions. [2022-03-03 19:08:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:02,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:02,871 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:02,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-03 19:08:03,088 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,SelfDestructingSolverStorable273 [2022-03-03 19:08:03,088 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash 539717111, now seen corresponding path program 259 times [2022-03-03 19:08:03,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:03,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69700858] [2022-03-03 19:08:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:03,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:03,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:03,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69700858] [2022-03-03 19:08:03,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69700858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:03,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363489358] [2022-03-03 19:08:03,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:08:03,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:03,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:03,285 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) [2022-03-03 19:08:03,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-03 19:08:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:08:03,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:03,397 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 35 [2022-03-03 19:08:03,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:03,547 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 43 treesize of output 37 [2022-03-03 19:08:03,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:03,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:08:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:03,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:04,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:04,129 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-03 19:08:04,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:04,270 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 107 [2022-03-03 19:08:04,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:04,276 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 85 [2022-03-03 19:08:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:04,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363489358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:04,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:04,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:04,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119499601] [2022-03-03 19:08:04,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:04,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:04,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:04,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:04,368 INFO L87 Difference]: Start difference. First operand 1800 states and 5966 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:05,177 INFO L93 Difference]: Finished difference Result 2084 states and 6647 transitions. [2022-03-03 19:08:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:08:05,177 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:05,181 INFO L225 Difference]: With dead ends: 2084 [2022-03-03 19:08:05,181 INFO L226 Difference]: Without dead ends: 1955 [2022-03-03 19:08:05,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:08:05,181 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:05,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 371 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 991 Invalid, 0 Unknown, 18 Unchecked, 0.4s Time] [2022-03-03 19:08:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-03-03 19:08:05,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1802. [2022-03-03 19:08:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 3.315380344253193) internal successors, (5971), 1801 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 5971 transitions. [2022-03-03 19:08:05,202 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 5971 transitions. Word has length 24 [2022-03-03 19:08:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:05,202 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 5971 transitions. [2022-03-03 19:08:05,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 5971 transitions. [2022-03-03 19:08:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:05,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:05,205 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:05,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:05,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:05,405 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:05,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1228727297, now seen corresponding path program 260 times [2022-03-03 19:08:05,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:05,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111422521] [2022-03-03 19:08:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:05,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:05,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:05,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111422521] [2022-03-03 19:08:05,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111422521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:05,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62035185] [2022-03-03 19:08:05,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:08:05,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:05,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:05,604 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) [2022-03-03 19:08:05,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-03 19:08:05,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:08:05,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:05,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:05,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:05,716 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 35 [2022-03-03 19:08:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:05,909 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 29 treesize of output 23 [2022-03-03 19:08:05,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:05,911 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 25 treesize of output 17 [2022-03-03 19:08:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:05,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:06,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:06,420 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 100 treesize of output 94 [2022-03-03 19:08:06,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:06,548 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-03 19:08:06,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:06,554 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 116 treesize of output 96 [2022-03-03 19:08:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:06,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62035185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:06,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:06,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:06,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369283313] [2022-03-03 19:08:06,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:06,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:06,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:06,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:06,654 INFO L87 Difference]: Start difference. First operand 1802 states and 5971 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:06,937 INFO L93 Difference]: Finished difference Result 1952 states and 6361 transitions. [2022-03-03 19:08:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:08:06,938 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:06,941 INFO L225 Difference]: With dead ends: 1952 [2022-03-03 19:08:06,941 INFO L226 Difference]: Without dead ends: 1894 [2022-03-03 19:08:06,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:08:06,941 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:06,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 224 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 521 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-03-03 19:08:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2022-03-03 19:08:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1800. [2022-03-03 19:08:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.3162868260144527) internal successors, (5966), 1799 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5966 transitions. [2022-03-03 19:08:06,961 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5966 transitions. Word has length 24 [2022-03-03 19:08:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:06,961 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 5966 transitions. [2022-03-03 19:08:06,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5966 transitions. [2022-03-03 19:08:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:06,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:06,964 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:06,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-03-03 19:08:07,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:07,164 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash -479321271, now seen corresponding path program 261 times [2022-03-03 19:08:07,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:07,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086579092] [2022-03-03 19:08:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:07,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:07,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:07,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086579092] [2022-03-03 19:08:07,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086579092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:07,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371044531] [2022-03-03 19:08:07,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:08:07,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:07,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:07,352 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) [2022-03-03 19:08:07,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-03 19:08:07,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:08:07,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:07,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:07,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:07,507 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 35 treesize of output 29 [2022-03-03 19:08:07,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:07,587 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:08:07,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:07,589 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:08:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:07,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:07,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:07,997 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 77 treesize of output 75 [2022-03-03 19:08:08,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:08,214 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-03-03 19:08:08,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:08,219 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 119 treesize of output 99 [2022-03-03 19:08:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:08,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371044531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:08,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:08,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:08,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248822033] [2022-03-03 19:08:08,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:08,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:08,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:08,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:08,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:08,322 INFO L87 Difference]: Start difference. First operand 1800 states and 5966 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:08,736 INFO L93 Difference]: Finished difference Result 1871 states and 6158 transitions. [2022-03-03 19:08:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:08:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:08,739 INFO L225 Difference]: With dead ends: 1871 [2022-03-03 19:08:08,739 INFO L226 Difference]: Without dead ends: 1832 [2022-03-03 19:08:08,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:08:08,739 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:08,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 257 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 740 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2022-03-03 19:08:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2022-03-03 19:08:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1800. [2022-03-03 19:08:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.3162868260144527) internal successors, (5966), 1799 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5966 transitions. [2022-03-03 19:08:08,758 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5966 transitions. Word has length 24 [2022-03-03 19:08:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:08,758 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 5966 transitions. [2022-03-03 19:08:08,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5966 transitions. [2022-03-03 19:08:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:08,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:08,761 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:08,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:08,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:08,961 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1577746675, now seen corresponding path program 262 times [2022-03-03 19:08:08,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:08,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432321096] [2022-03-03 19:08:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:08,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:09,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:09,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432321096] [2022-03-03 19:08:09,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432321096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:09,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22810319] [2022-03-03 19:08:09,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:08:09,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:09,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:09,156 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) [2022-03-03 19:08:09,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-03 19:08:09,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:08:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:09,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:08:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:09,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:09,316 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 35 treesize of output 29 [2022-03-03 19:08:09,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:09,376 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 55 treesize of output 47 [2022-03-03 19:08:09,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:09,379 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:08:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:09,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:09,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:09,868 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-03-03 19:08:10,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:10,103 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 119 treesize of output 105 [2022-03-03 19:08:10,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:10,108 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 83 [2022-03-03 19:08:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:10,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22810319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:10,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:10,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:10,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237100127] [2022-03-03 19:08:10,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:10,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:10,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:10,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:10,204 INFO L87 Difference]: Start difference. First operand 1800 states and 5966 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:10,863 INFO L93 Difference]: Finished difference Result 1978 states and 6402 transitions. [2022-03-03 19:08:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:08:10,863 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:10,866 INFO L225 Difference]: With dead ends: 1978 [2022-03-03 19:08:10,866 INFO L226 Difference]: Without dead ends: 1896 [2022-03-03 19:08:10,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:08:10,867 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 89 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:10,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 273 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 611 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-03-03 19:08:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2022-03-03 19:08:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1802. [2022-03-03 19:08:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 3.315380344253193) internal successors, (5971), 1801 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 5971 transitions. [2022-03-03 19:08:10,887 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 5971 transitions. Word has length 24 [2022-03-03 19:08:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:10,887 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 5971 transitions. [2022-03-03 19:08:10,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 5971 transitions. [2022-03-03 19:08:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:10,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:10,889 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:10,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-03-03 19:08:11,089 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,SelfDestructingSolverStorable277 [2022-03-03 19:08:11,090 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:11,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:11,090 INFO L85 PathProgramCache]: Analyzing trace with hash -234458175, now seen corresponding path program 263 times [2022-03-03 19:08:11,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:11,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628687430] [2022-03-03 19:08:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:11,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:11,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628687430] [2022-03-03 19:08:11,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628687430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:11,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437504378] [2022-03-03 19:08:11,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:08:11,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:11,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:11,234 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) [2022-03-03 19:08:11,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-03 19:08:11,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:08:11,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:11,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:11,316 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 39 treesize of output 33 [2022-03-03 19:08:11,380 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 24 treesize of output 20 [2022-03-03 19:08:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:11,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:11,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:11,771 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-03-03 19:08:11,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:11,911 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 83 treesize of output 74 [2022-03-03 19:08:11,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:11,916 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 65 treesize of output 56 [2022-03-03 19:08:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:12,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437504378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:12,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:12,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:08:12,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77618864] [2022-03-03 19:08:12,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:12,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:08:12,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:08:12,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:08:12,029 INFO L87 Difference]: Start difference. First operand 1802 states and 5971 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:12,473 INFO L93 Difference]: Finished difference Result 1856 states and 6104 transitions. [2022-03-03 19:08:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:08:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:12,476 INFO L225 Difference]: With dead ends: 1856 [2022-03-03 19:08:12,476 INFO L226 Difference]: Without dead ends: 1822 [2022-03-03 19:08:12,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:08:12,477 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:12,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 209 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:08:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-03-03 19:08:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1790. [2022-03-03 19:08:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 3.3186137506987143) internal successors, (5937), 1789 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 5937 transitions. [2022-03-03 19:08:12,497 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 5937 transitions. Word has length 24 [2022-03-03 19:08:12,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:12,497 INFO L470 AbstractCegarLoop]: Abstraction has 1790 states and 5937 transitions. [2022-03-03 19:08:12,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 5937 transitions. [2022-03-03 19:08:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:12,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:12,499 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:12,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:12,700 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,SelfDestructingSolverStorable278 [2022-03-03 19:08:12,700 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2095155597, now seen corresponding path program 264 times [2022-03-03 19:08:12,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:12,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693064413] [2022-03-03 19:08:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:12,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:12,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:12,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693064413] [2022-03-03 19:08:12,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693064413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:12,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150911472] [2022-03-03 19:08:12,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:08:12,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:12,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:12,865 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) [2022-03-03 19:08:12,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-03 19:08:12,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:08:12,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:12,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:12,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:12,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:08:13,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:13,216 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 26 treesize of output 22 [2022-03-03 19:08:13,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:13,219 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 12 treesize of output 3 [2022-03-03 19:08:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:13,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:13,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:13,761 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 141 treesize of output 121 [2022-03-03 19:08:13,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:13,917 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 31 treesize of output 33 [2022-03-03 19:08:13,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:13,921 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 25 treesize of output 27 [2022-03-03 19:08:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:13,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150911472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:13,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:13,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:13,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123217247] [2022-03-03 19:08:13,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:13,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:13,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:13,946 INFO L87 Difference]: Start difference. First operand 1790 states and 5937 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:14,140 INFO L93 Difference]: Finished difference Result 1904 states and 6267 transitions. [2022-03-03 19:08:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:08:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:14,143 INFO L225 Difference]: With dead ends: 1904 [2022-03-03 19:08:14,143 INFO L226 Difference]: Without dead ends: 1873 [2022-03-03 19:08:14,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:14,143 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:14,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 167 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 463 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-03-03 19:08:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-03-03 19:08:14,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1793. [2022-03-03 19:08:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 3.318638392857143) internal successors, (5947), 1792 states have internal predecessors, (5947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 5947 transitions. [2022-03-03 19:08:14,178 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 5947 transitions. Word has length 24 [2022-03-03 19:08:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:14,178 INFO L470 AbstractCegarLoop]: Abstraction has 1793 states and 5947 transitions. [2022-03-03 19:08:14,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 5947 transitions. [2022-03-03 19:08:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:14,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:14,180 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:14,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-03 19:08:14,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-03 19:08:14,381 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:14,381 INFO L85 PathProgramCache]: Analyzing trace with hash -931222423, now seen corresponding path program 265 times [2022-03-03 19:08:14,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:14,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253313784] [2022-03-03 19:08:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:14,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:14,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:14,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253313784] [2022-03-03 19:08:14,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253313784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:14,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688716783] [2022-03-03 19:08:14,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:08:14,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:14,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:14,545 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) [2022-03-03 19:08:14,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-03 19:08:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:14,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:14,671 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:08:14,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:14,797 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 47 treesize of output 41 [2022-03-03 19:08:14,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:14,799 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 37 treesize of output 21 [2022-03-03 19:08:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:14,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:15,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:15,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:08:15,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:15,584 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 31 treesize of output 33 [2022-03-03 19:08:15,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:15,587 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 25 treesize of output 27 [2022-03-03 19:08:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:15,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688716783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:15,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:15,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:08:15,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975224927] [2022-03-03 19:08:15,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:15,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:08:15,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:15,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:08:15,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:08:15,607 INFO L87 Difference]: Start difference. First operand 1793 states and 5947 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-03-03 19:08:15,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:15,732 INFO L93 Difference]: Finished difference Result 1892 states and 6231 transitions. [2022-03-03 19:08:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:08:15,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 24 [2022-03-03 19:08:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:15,735 INFO L225 Difference]: With dead ends: 1892 [2022-03-03 19:08:15,735 INFO L226 Difference]: Without dead ends: 1857 [2022-03-03 19:08:15,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:08:15,735 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:15,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 220 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 287 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-03-03 19:08:15,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-03-03 19:08:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1793. [2022-03-03 19:08:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 3.318638392857143) internal successors, (5947), 1792 states have internal predecessors, (5947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 5947 transitions. [2022-03-03 19:08:15,754 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 5947 transitions. Word has length 24 [2022-03-03 19:08:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:15,754 INFO L470 AbstractCegarLoop]: Abstraction has 1793 states and 5947 transitions. [2022-03-03 19:08:15,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-03-03 19:08:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 5947 transitions. [2022-03-03 19:08:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:15,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:15,757 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:15,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-03 19:08:15,957 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,SelfDestructingSolverStorable280 [2022-03-03 19:08:15,957 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:15,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1786604753, now seen corresponding path program 266 times [2022-03-03 19:08:15,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:15,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374213388] [2022-03-03 19:08:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:15,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:16,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:16,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374213388] [2022-03-03 19:08:16,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374213388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:16,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011475399] [2022-03-03 19:08:16,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:08:16,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:16,142 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) [2022-03-03 19:08:16,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-03 19:08:16,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:08:16,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:16,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:16,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:16,237 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 35 [2022-03-03 19:08:16,327 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 [2022-03-03 19:08:16,328 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 [2022-03-03 19:08:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:16,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:16,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:16,827 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 79 treesize of output 70 [2022-03-03 19:08:16,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:16,929 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 31 treesize of output 33 [2022-03-03 19:08:16,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:16,933 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 25 treesize of output 27 [2022-03-03 19:08:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:16,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011475399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:16,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:16,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:16,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531842853] [2022-03-03 19:08:16,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:16,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:16,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:16,950 INFO L87 Difference]: Start difference. First operand 1793 states and 5947 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:17,759 INFO L93 Difference]: Finished difference Result 2239 states and 7231 transitions. [2022-03-03 19:08:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:08:17,760 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:17,763 INFO L225 Difference]: With dead ends: 2239 [2022-03-03 19:08:17,763 INFO L226 Difference]: Without dead ends: 2154 [2022-03-03 19:08:17,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:08:17,764 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:17,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 366 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1119 Invalid, 0 Unknown, 8 Unchecked, 0.4s Time] [2022-03-03 19:08:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-03-03 19:08:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1853. [2022-03-03 19:08:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.311015118790497) internal successors, (6132), 1852 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6132 transitions. [2022-03-03 19:08:17,786 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6132 transitions. Word has length 24 [2022-03-03 19:08:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:17,786 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 6132 transitions. [2022-03-03 19:08:17,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6132 transitions. [2022-03-03 19:08:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:17,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:17,789 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:17,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-03-03 19:08:17,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:17,990 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash 834617287, now seen corresponding path program 267 times [2022-03-03 19:08:17,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:17,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125308645] [2022-03-03 19:08:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:17,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:18,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:18,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125308645] [2022-03-03 19:08:18,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125308645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:18,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175650395] [2022-03-03 19:08:18,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:08:18,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:18,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:18,181 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) [2022-03-03 19:08:18,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-03 19:08:18,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:08:18,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:08:18,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:18,278 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 35 [2022-03-03 19:08:18,399 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 [2022-03-03 19:08:18,401 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 25 treesize of output 17 [2022-03-03 19:08:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:18,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:18,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:18,957 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 115 treesize of output 101 [2022-03-03 19:08:19,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:19,115 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 35 treesize of output 37 [2022-03-03 19:08:19,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:19,119 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:08:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:19,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175650395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:19,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:19,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:19,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120665930] [2022-03-03 19:08:19,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:19,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:19,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:19,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:19,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:19,142 INFO L87 Difference]: Start difference. First operand 1853 states and 6132 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:20,026 INFO L93 Difference]: Finished difference Result 2329 states and 7459 transitions. [2022-03-03 19:08:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:08:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:20,030 INFO L225 Difference]: With dead ends: 2329 [2022-03-03 19:08:20,030 INFO L226 Difference]: Without dead ends: 2204 [2022-03-03 19:08:20,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:08:20,030 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:20,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 293 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-03-03 19:08:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1848. [2022-03-03 19:08:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.3096913914455874) internal successors, (6113), 1847 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6113 transitions. [2022-03-03 19:08:20,053 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6113 transitions. Word has length 24 [2022-03-03 19:08:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:20,053 INFO L470 AbstractCegarLoop]: Abstraction has 1848 states and 6113 transitions. [2022-03-03 19:08:20,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6113 transitions. [2022-03-03 19:08:20,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:20,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:20,055 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:20,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-03-03 19:08:20,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-03 19:08:20,256 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:20,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:20,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2005835981, now seen corresponding path program 268 times [2022-03-03 19:08:20,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:20,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260385516] [2022-03-03 19:08:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:20,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:20,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:20,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260385516] [2022-03-03 19:08:20,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260385516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:20,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226192612] [2022-03-03 19:08:20,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:08:20,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:20,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:20,441 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) [2022-03-03 19:08:20,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-03 19:08:20,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:08:20,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:20,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:20,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:20,550 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 35 [2022-03-03 19:08:20,707 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 22 [2022-03-03 19:08:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:20,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:21,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:21,437 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 141 treesize of output 121 [2022-03-03 19:08:21,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:21,639 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 31 treesize of output 33 [2022-03-03 19:08:21,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:21,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:08:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:21,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226192612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:21,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:21,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:21,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148922656] [2022-03-03 19:08:21,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:21,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:21,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:21,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:21,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:21,663 INFO L87 Difference]: Start difference. First operand 1848 states and 6113 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:22,577 INFO L93 Difference]: Finished difference Result 2341 states and 7445 transitions. [2022-03-03 19:08:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:08:22,577 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:22,581 INFO L225 Difference]: With dead ends: 2341 [2022-03-03 19:08:22,581 INFO L226 Difference]: Without dead ends: 2210 [2022-03-03 19:08:22,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:08:22,581 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 146 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:22,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 300 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2022-03-03 19:08:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1848. [2022-03-03 19:08:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.3096913914455874) internal successors, (6113), 1847 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6113 transitions. [2022-03-03 19:08:22,605 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6113 transitions. Word has length 24 [2022-03-03 19:08:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:22,605 INFO L470 AbstractCegarLoop]: Abstraction has 1848 states and 6113 transitions. [2022-03-03 19:08:22,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6113 transitions. [2022-03-03 19:08:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:22,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:22,607 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:22,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-03-03 19:08:22,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:22,807 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash -647549339, now seen corresponding path program 269 times [2022-03-03 19:08:22,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:22,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53924375] [2022-03-03 19:08:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:22,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:23,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:23,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53924375] [2022-03-03 19:08:23,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53924375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:23,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304062538] [2022-03-03 19:08:23,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:08:23,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:23,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:23,012 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) [2022-03-03 19:08:23,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-03 19:08:23,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:08:23,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:23,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:23,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:23,138 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 41 treesize of output 35 [2022-03-03 19:08:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:23,193 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 47 treesize of output 41 [2022-03-03 19:08:23,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:23,196 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:08:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:23,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:24,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:24,009 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 80 treesize of output 73 [2022-03-03 19:08:24,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:24,149 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 31 treesize of output 33 [2022-03-03 19:08:24,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:24,152 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 25 treesize of output 27 [2022-03-03 19:08:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:24,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304062538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:24,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:24,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:24,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083742238] [2022-03-03 19:08:24,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:24,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:24,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:24,172 INFO L87 Difference]: Start difference. First operand 1848 states and 6113 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:24,589 INFO L93 Difference]: Finished difference Result 1990 states and 6501 transitions. [2022-03-03 19:08:24,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:08:24,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:24,592 INFO L225 Difference]: With dead ends: 1990 [2022-03-03 19:08:24,592 INFO L226 Difference]: Without dead ends: 1924 [2022-03-03 19:08:24,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:08:24,592 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:24,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 211 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 670 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-03-03 19:08:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2022-03-03 19:08:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1848. [2022-03-03 19:08:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.3096913914455874) internal successors, (6113), 1847 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6113 transitions. [2022-03-03 19:08:24,613 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6113 transitions. Word has length 24 [2022-03-03 19:08:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:24,613 INFO L470 AbstractCegarLoop]: Abstraction has 1848 states and 6113 transitions. [2022-03-03 19:08:24,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6113 transitions. [2022-03-03 19:08:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:24,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:24,616 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:24,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-03-03 19:08:24,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:24,816 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1239891605, now seen corresponding path program 270 times [2022-03-03 19:08:24,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:24,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745981112] [2022-03-03 19:08:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:24,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:24,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:24,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745981112] [2022-03-03 19:08:24,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745981112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:24,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757859110] [2022-03-03 19:08:24,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:08:24,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:24,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:24,956 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) [2022-03-03 19:08:24,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-03 19:08:24,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:08:24,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:24,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:25,062 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 [2022-03-03 19:08:25,153 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 [2022-03-03 19:08:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:25,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:25,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:25,624 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 79 treesize of output 70 [2022-03-03 19:08:25,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:25,753 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 31 treesize of output 33 [2022-03-03 19:08:25,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:25,757 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 25 treesize of output 27 [2022-03-03 19:08:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:25,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757859110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:25,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:25,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:08:25,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386328414] [2022-03-03 19:08:25,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:25,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:08:25,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:08:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:08:25,777 INFO L87 Difference]: Start difference. First operand 1848 states and 6113 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:26,243 INFO L93 Difference]: Finished difference Result 2149 states and 6965 transitions. [2022-03-03 19:08:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:08:26,243 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:26,247 INFO L225 Difference]: With dead ends: 2149 [2022-03-03 19:08:26,247 INFO L226 Difference]: Without dead ends: 2046 [2022-03-03 19:08:26,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:08:26,247 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:26,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 236 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2022-03-03 19:08:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1862. [2022-03-03 19:08:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 3.30736163353036) internal successors, (6155), 1861 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 6155 transitions. [2022-03-03 19:08:26,268 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 6155 transitions. Word has length 24 [2022-03-03 19:08:26,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:26,268 INFO L470 AbstractCegarLoop]: Abstraction has 1862 states and 6155 transitions. [2022-03-03 19:08:26,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 6155 transitions. [2022-03-03 19:08:26,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:26,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:26,270 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:26,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:26,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:26,471 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:26,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:26,471 INFO L85 PathProgramCache]: Analyzing trace with hash 159794913, now seen corresponding path program 271 times [2022-03-03 19:08:26,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:26,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336873461] [2022-03-03 19:08:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:26,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:26,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:26,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336873461] [2022-03-03 19:08:26,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336873461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:26,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155795045] [2022-03-03 19:08:26,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:08:26,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:26,620 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) [2022-03-03 19:08:26,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-03 19:08:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:08:26,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:26,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:26,745 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 23 treesize of output 19 [2022-03-03 19:08:26,786 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 23 treesize of output 19 [2022-03-03 19:08:26,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:26,788 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 12 treesize of output 3 [2022-03-03 19:08:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:26,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:27,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:27,463 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 110 treesize of output 98 [2022-03-03 19:08:27,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:27,647 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:08:27,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:27,650 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:08:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:27,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155795045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:27,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:27,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:08:27,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981787769] [2022-03-03 19:08:27,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:27,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:08:27,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:08:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:08:27,673 INFO L87 Difference]: Start difference. First operand 1862 states and 6155 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:08:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:28,791 INFO L93 Difference]: Finished difference Result 2471 states and 7763 transitions. [2022-03-03 19:08:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:08:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:08:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:28,795 INFO L225 Difference]: With dead ends: 2471 [2022-03-03 19:08:28,795 INFO L226 Difference]: Without dead ends: 2293 [2022-03-03 19:08:28,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:08:28,795 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 165 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:28,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 299 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2022-03-03 19:08:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1855. [2022-03-03 19:08:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.308522114347357) internal successors, (6134), 1854 states have internal predecessors, (6134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6134 transitions. [2022-03-03 19:08:28,820 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6134 transitions. Word has length 24 [2022-03-03 19:08:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:28,820 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 6134 transitions. [2022-03-03 19:08:28,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:08:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6134 transitions. [2022-03-03 19:08:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:28,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:28,822 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:28,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:29,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:29,023 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1068770537, now seen corresponding path program 272 times [2022-03-03 19:08:29,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:29,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548441203] [2022-03-03 19:08:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:29,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:29,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548441203] [2022-03-03 19:08:29,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548441203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:29,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396400468] [2022-03-03 19:08:29,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:08:29,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:29,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:29,168 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) [2022-03-03 19:08:29,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-03 19:08:29,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:08:29,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:29,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:29,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:29,311 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 [2022-03-03 19:08:29,344 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 [2022-03-03 19:08:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:29,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:29,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:29,849 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 143 treesize of output 123 [2022-03-03 19:08:30,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:30,109 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 31 treesize of output 33 [2022-03-03 19:08:30,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:30,112 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 25 treesize of output 27 [2022-03-03 19:08:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:30,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396400468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:30,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:30,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:08:30,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698131219] [2022-03-03 19:08:30,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:30,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:08:30,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:08:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:08:30,130 INFO L87 Difference]: Start difference. First operand 1855 states and 6134 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:08:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:30,578 INFO L93 Difference]: Finished difference Result 2170 states and 7058 transitions. [2022-03-03 19:08:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:08:30,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 24 [2022-03-03 19:08:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:30,582 INFO L225 Difference]: With dead ends: 2170 [2022-03-03 19:08:30,582 INFO L226 Difference]: Without dead ends: 2094 [2022-03-03 19:08:30,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:08:30,582 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 109 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:30,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 209 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:08:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2022-03-03 19:08:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1849. [2022-03-03 19:08:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.3095238095238093) internal successors, (6116), 1848 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:30,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6116 transitions. [2022-03-03 19:08:30,607 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6116 transitions. Word has length 24 [2022-03-03 19:08:30,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:30,607 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 6116 transitions. [2022-03-03 19:08:30,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-03-03 19:08:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6116 transitions. [2022-03-03 19:08:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:30,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:30,610 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:30,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-03-03 19:08:30,810 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,SelfDestructingSolverStorable287 [2022-03-03 19:08:30,810 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash 487009757, now seen corresponding path program 273 times [2022-03-03 19:08:30,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:30,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418463950] [2022-03-03 19:08:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:30,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:31,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:31,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418463950] [2022-03-03 19:08:31,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418463950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:31,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526934622] [2022-03-03 19:08:31,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:08:31,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:31,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:31,011 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) [2022-03-03 19:08:31,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-03 19:08:31,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:08:31,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:31,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:31,128 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 35 [2022-03-03 19:08:31,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:31,179 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 43 treesize of output 37 [2022-03-03 19:08:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:31,182 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:08:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:31,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:31,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:31,850 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 72 treesize of output 65 [2022-03-03 19:08:31,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:31,970 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:08:31,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:31,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:08:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:31,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526934622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:31,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:31,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:31,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874940770] [2022-03-03 19:08:31,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:31,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:31,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:31,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:31,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:31,993 INFO L87 Difference]: Start difference. First operand 1849 states and 6116 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:33,422 INFO L93 Difference]: Finished difference Result 2296 states and 7384 transitions. [2022-03-03 19:08:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:08:33,422 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:33,426 INFO L225 Difference]: With dead ends: 2296 [2022-03-03 19:08:33,426 INFO L226 Difference]: Without dead ends: 2195 [2022-03-03 19:08:33,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:08:33,426 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:33,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 356 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1098 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time] [2022-03-03 19:08:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2022-03-03 19:08:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1855. [2022-03-03 19:08:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.3128371089536137) internal successors, (6142), 1854 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6142 transitions. [2022-03-03 19:08:33,452 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6142 transitions. Word has length 24 [2022-03-03 19:08:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:33,452 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 6142 transitions. [2022-03-03 19:08:33,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6142 transitions. [2022-03-03 19:08:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:33,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:33,455 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:33,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:33,655 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,SelfDestructingSolverStorable288 [2022-03-03 19:08:33,655 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:33,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1383727907, now seen corresponding path program 274 times [2022-03-03 19:08:33,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:33,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946370002] [2022-03-03 19:08:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:08:33,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:33,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946370002] [2022-03-03 19:08:33,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946370002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:33,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207661029] [2022-03-03 19:08:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:08:33,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:33,885 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) [2022-03-03 19:08:33,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-03 19:08:33,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:08:33,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:33,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:08:33,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:34,004 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 35 [2022-03-03 19:08:34,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:34,073 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 43 treesize of output 37 [2022-03-03 19:08:34,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:34,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:08:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:08:34,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:34,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:34,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 90 [2022-03-03 19:08:35,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:35,177 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 35 treesize of output 37 [2022-03-03 19:08:35,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:35,180 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:08:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:08:35,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207661029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:35,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:35,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:35,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217293495] [2022-03-03 19:08:35,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:35,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:35,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:35,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:35,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:35,203 INFO L87 Difference]: Start difference. First operand 1855 states and 6142 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:36,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:36,847 INFO L93 Difference]: Finished difference Result 2895 states and 8926 transitions. [2022-03-03 19:08:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:08:36,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:36,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:36,852 INFO L225 Difference]: With dead ends: 2895 [2022-03-03 19:08:36,852 INFO L226 Difference]: Without dead ends: 2711 [2022-03-03 19:08:36,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:08:36,852 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 204 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:36,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 506 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1506 Invalid, 0 Unknown, 7 Unchecked, 0.6s Time] [2022-03-03 19:08:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2022-03-03 19:08:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 1869. [2022-03-03 19:08:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.3233404710920773) internal successors, (6208), 1868 states have internal predecessors, (6208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6208 transitions. [2022-03-03 19:08:36,882 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6208 transitions. Word has length 24 [2022-03-03 19:08:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:36,882 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 6208 transitions. [2022-03-03 19:08:36,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6208 transitions. [2022-03-03 19:08:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:36,884 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:36,884 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:36,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-03 19:08:37,085 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,SelfDestructingSolverStorable289 [2022-03-03 19:08:37,085 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:37,085 INFO L85 PathProgramCache]: Analyzing trace with hash 371489043, now seen corresponding path program 275 times [2022-03-03 19:08:37,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:37,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571462707] [2022-03-03 19:08:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:37,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:37,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571462707] [2022-03-03 19:08:37,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571462707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:37,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670851193] [2022-03-03 19:08:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:08:37,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:37,291 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) [2022-03-03 19:08:37,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-03 19:08:37,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:08:37,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:37,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:37,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:37,398 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 35 [2022-03-03 19:08:37,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:37,473 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 24 treesize of output 20 [2022-03-03 19:08:37,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:37,475 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:08:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:37,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:38,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:38,074 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 72 treesize of output 65 [2022-03-03 19:08:38,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:38,188 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 31 treesize of output 33 [2022-03-03 19:08:38,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:38,191 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:08:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:38,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670851193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:38,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:38,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:38,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735822683] [2022-03-03 19:08:38,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:38,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:38,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:38,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:38,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:38,211 INFO L87 Difference]: Start difference. First operand 1869 states and 6208 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:39,014 INFO L93 Difference]: Finished difference Result 2213 states and 7219 transitions. [2022-03-03 19:08:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:08:39,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:39,018 INFO L225 Difference]: With dead ends: 2213 [2022-03-03 19:08:39,018 INFO L226 Difference]: Without dead ends: 2128 [2022-03-03 19:08:39,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:08:39,019 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:39,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 245 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 828 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-03-03 19:08:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-03-03 19:08:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 1876. [2022-03-03 19:08:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.3258666666666667) internal successors, (6236), 1875 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6236 transitions. [2022-03-03 19:08:39,042 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6236 transitions. Word has length 24 [2022-03-03 19:08:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:39,042 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 6236 transitions. [2022-03-03 19:08:39,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6236 transitions. [2022-03-03 19:08:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:39,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:39,044 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:39,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:39,245 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,SelfDestructingSolverStorable290 [2022-03-03 19:08:39,245 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1177075131, now seen corresponding path program 276 times [2022-03-03 19:08:39,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:39,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563168638] [2022-03-03 19:08:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:39,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:39,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:39,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563168638] [2022-03-03 19:08:39,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563168638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:39,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747327244] [2022-03-03 19:08:39,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:08:39,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:39,430 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) [2022-03-03 19:08:39,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-03 19:08:39,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:08:39,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:39,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:08:39,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:39,540 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 35 [2022-03-03 19:08:39,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:39,805 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:08:39,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:39,808 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-03 19:08:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:39,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:40,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:40,435 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 115 treesize of output 101 [2022-03-03 19:08:40,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:40,635 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 35 treesize of output 37 [2022-03-03 19:08:40,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:40,639 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 29 treesize of output 31 [2022-03-03 19:08:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:40,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747327244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:40,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:40,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:40,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762885569] [2022-03-03 19:08:40,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:40,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:40,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:40,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:40,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:40,659 INFO L87 Difference]: Start difference. First operand 1876 states and 6236 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:41,107 INFO L93 Difference]: Finished difference Result 2209 states and 7167 transitions. [2022-03-03 19:08:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:08:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:41,111 INFO L225 Difference]: With dead ends: 2209 [2022-03-03 19:08:41,111 INFO L226 Difference]: Without dead ends: 2121 [2022-03-03 19:08:41,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:08:41,112 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:41,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 332 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 837 Invalid, 0 Unknown, 211 Unchecked, 0.3s Time] [2022-03-03 19:08:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2022-03-03 19:08:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1874. [2022-03-03 19:08:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1873 states have (on average 3.3251468232781636) internal successors, (6228), 1873 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 6228 transitions. [2022-03-03 19:08:41,134 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 6228 transitions. Word has length 24 [2022-03-03 19:08:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:41,135 INFO L470 AbstractCegarLoop]: Abstraction has 1874 states and 6228 transitions. [2022-03-03 19:08:41,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 6228 transitions. [2022-03-03 19:08:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:41,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:41,137 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:41,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:41,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:41,338 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:41,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1661477901, now seen corresponding path program 277 times [2022-03-03 19:08:41,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:41,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019185966] [2022-03-03 19:08:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:41,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:41,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:41,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019185966] [2022-03-03 19:08:41,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019185966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:41,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149964955] [2022-03-03 19:08:41,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:08:41,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:41,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:41,471 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) [2022-03-03 19:08:41,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-03 19:08:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:41,570 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 35 [2022-03-03 19:08:41,637 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 43 treesize of output 37 [2022-03-03 19:08:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:41,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:42,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:42,190 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 141 treesize of output 121 [2022-03-03 19:08:42,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:42,378 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 31 treesize of output 33 [2022-03-03 19:08:42,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:42,381 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 25 treesize of output 27 [2022-03-03 19:08:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:42,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149964955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:42,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:42,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:42,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80023230] [2022-03-03 19:08:42,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:42,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:42,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:42,399 INFO L87 Difference]: Start difference. First operand 1874 states and 6228 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:43,348 INFO L93 Difference]: Finished difference Result 2362 states and 7590 transitions. [2022-03-03 19:08:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:08:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:43,352 INFO L225 Difference]: With dead ends: 2362 [2022-03-03 19:08:43,352 INFO L226 Difference]: Without dead ends: 2261 [2022-03-03 19:08:43,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:08:43,353 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:43,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 293 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2022-03-03 19:08:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1886. [2022-03-03 19:08:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3230769230769233) internal successors, (6264), 1885 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6264 transitions. [2022-03-03 19:08:43,376 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6264 transitions. Word has length 24 [2022-03-03 19:08:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:43,377 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 6264 transitions. [2022-03-03 19:08:43,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6264 transitions. [2022-03-03 19:08:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:43,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:43,379 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:43,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-03-03 19:08:43,579 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,SelfDestructingSolverStorable292 [2022-03-03 19:08:43,580 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1120487053, now seen corresponding path program 278 times [2022-03-03 19:08:43,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:43,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401660061] [2022-03-03 19:08:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:08:43,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:43,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401660061] [2022-03-03 19:08:43,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401660061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:43,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263870750] [2022-03-03 19:08:43,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:08:43,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:43,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:43,751 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) [2022-03-03 19:08:43,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-03 19:08:43,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:08:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:43,865 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 35 [2022-03-03 19:08:44,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:44,067 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 24 treesize of output 20 [2022-03-03 19:08:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:44,069 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 12 treesize of output 3 [2022-03-03 19:08:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:08:44,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:44,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:44,605 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 141 treesize of output 121 [2022-03-03 19:08:44,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:44,806 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 31 treesize of output 33 [2022-03-03 19:08:44,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:44,809 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 25 treesize of output 27 [2022-03-03 19:08:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:08:44,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263870750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:44,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:44,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:44,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128920551] [2022-03-03 19:08:44,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:44,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:44,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:44,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:44,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:44,829 INFO L87 Difference]: Start difference. First operand 1886 states and 6264 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:45,386 INFO L93 Difference]: Finished difference Result 2242 states and 7265 transitions. [2022-03-03 19:08:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:08:45,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:45,390 INFO L225 Difference]: With dead ends: 2242 [2022-03-03 19:08:45,390 INFO L226 Difference]: Without dead ends: 2204 [2022-03-03 19:08:45,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:08:45,390 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:45,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 267 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 820 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2022-03-03 19:08:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-03-03 19:08:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1884. [2022-03-03 19:08:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.325013276686139) internal successors, (6261), 1883 states have internal predecessors, (6261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6261 transitions. [2022-03-03 19:08:45,415 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6261 transitions. Word has length 24 [2022-03-03 19:08:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:45,415 INFO L470 AbstractCegarLoop]: Abstraction has 1884 states and 6261 transitions. [2022-03-03 19:08:45,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6261 transitions. [2022-03-03 19:08:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:45,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:45,417 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:45,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:45,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-03-03 19:08:45,618 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:45,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:45,618 INFO L85 PathProgramCache]: Analyzing trace with hash 512696771, now seen corresponding path program 279 times [2022-03-03 19:08:45,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:45,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094062812] [2022-03-03 19:08:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:45,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:45,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:45,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094062812] [2022-03-03 19:08:45,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094062812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:45,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509980618] [2022-03-03 19:08:45,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:08:45,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:45,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:45,751 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) [2022-03-03 19:08:45,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-03 19:08:45,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:08:45,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:45,844 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 [2022-03-03 19:08:45,934 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 [2022-03-03 19:08:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:46,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:46,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:46,400 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 79 treesize of output 70 [2022-03-03 19:08:46,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:46,502 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 31 treesize of output 33 [2022-03-03 19:08:46,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:46,506 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:08:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:46,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509980618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:46,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:46,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 19:08:46,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637247012] [2022-03-03 19:08:46,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:46,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:08:46,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:46,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:08:46,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:08:46,523 INFO L87 Difference]: Start difference. First operand 1884 states and 6261 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:46,920 INFO L93 Difference]: Finished difference Result 2177 states and 7092 transitions. [2022-03-03 19:08:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:08:46,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:46,924 INFO L225 Difference]: With dead ends: 2177 [2022-03-03 19:08:46,924 INFO L226 Difference]: Without dead ends: 2074 [2022-03-03 19:08:46,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:46,925 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:46,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 199 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:08:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-03-03 19:08:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1867. [2022-03-03 19:08:46,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.327974276527331) internal successors, (6210), 1866 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6210 transitions. [2022-03-03 19:08:46,955 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6210 transitions. Word has length 24 [2022-03-03 19:08:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:46,955 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 6210 transitions. [2022-03-03 19:08:46,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6210 transitions. [2022-03-03 19:08:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:46,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:46,957 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:46,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-03-03 19:08:47,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:47,158 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash -567399921, now seen corresponding path program 280 times [2022-03-03 19:08:47,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:47,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663303682] [2022-03-03 19:08:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:47,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:47,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:47,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663303682] [2022-03-03 19:08:47,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663303682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:47,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058873184] [2022-03-03 19:08:47,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:08:47,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:47,315 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) [2022-03-03 19:08:47,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-03 19:08:47,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:08:47,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:47,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:08:47,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:47,429 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 [2022-03-03 19:08:47,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:08:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:47,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:48,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:48,181 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 110 treesize of output 98 [2022-03-03 19:08:48,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:48,360 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 35 treesize of output 37 [2022-03-03 19:08:48,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:48,364 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 29 treesize of output 31 [2022-03-03 19:08:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:48,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058873184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:48,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:48,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:08:48,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106016679] [2022-03-03 19:08:48,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:48,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:08:48,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:08:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:08:48,387 INFO L87 Difference]: Start difference. First operand 1867 states and 6210 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:49,574 INFO L93 Difference]: Finished difference Result 2469 states and 7893 transitions. [2022-03-03 19:08:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:08:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:49,578 INFO L225 Difference]: With dead ends: 2469 [2022-03-03 19:08:49,578 INFO L226 Difference]: Without dead ends: 2322 [2022-03-03 19:08:49,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:08:49,579 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:49,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 469 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1293 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2022-03-03 19:08:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-03-03 19:08:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1860. [2022-03-03 19:08:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.329209252286175) internal successors, (6189), 1859 states have internal predecessors, (6189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6189 transitions. [2022-03-03 19:08:49,615 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6189 transitions. Word has length 24 [2022-03-03 19:08:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:49,615 INFO L470 AbstractCegarLoop]: Abstraction has 1860 states and 6189 transitions. [2022-03-03 19:08:49,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6189 transitions. [2022-03-03 19:08:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:49,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:49,618 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:49,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-03-03 19:08:49,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:49,818 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:49,819 INFO L85 PathProgramCache]: Analyzing trace with hash 518892243, now seen corresponding path program 281 times [2022-03-03 19:08:49,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:49,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563043965] [2022-03-03 19:08:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:49,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:49,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:49,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563043965] [2022-03-03 19:08:49,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563043965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:49,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605802106] [2022-03-03 19:08:49,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:08:49,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:49,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:49,992 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) [2022-03-03 19:08:49,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-03 19:08:50,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:08:50,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:50,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:50,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:50,101 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 [2022-03-03 19:08:50,139 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 [2022-03-03 19:08:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:50,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:50,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:50,885 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-03 19:08:51,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:51,093 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 31 treesize of output 33 [2022-03-03 19:08:51,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:51,097 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 25 treesize of output 27 [2022-03-03 19:08:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:51,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605802106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:51,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:51,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:08:51,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823533533] [2022-03-03 19:08:51,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:08:51,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:08:51,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:08:51,120 INFO L87 Difference]: Start difference. First operand 1860 states and 6189 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:51,663 INFO L93 Difference]: Finished difference Result 2282 states and 7373 transitions. [2022-03-03 19:08:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:08:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:51,667 INFO L225 Difference]: With dead ends: 2282 [2022-03-03 19:08:51,667 INFO L226 Difference]: Without dead ends: 2210 [2022-03-03 19:08:51,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:08:51,667 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:51,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 241 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2022-03-03 19:08:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1836. [2022-03-03 19:08:51,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 3.319891008174387) internal successors, (6092), 1835 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6092 transitions. [2022-03-03 19:08:51,690 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6092 transitions. Word has length 24 [2022-03-03 19:08:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:51,690 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 6092 transitions. [2022-03-03 19:08:51,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6092 transitions. [2022-03-03 19:08:51,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:51,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:51,692 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:51,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-03 19:08:51,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:51,893 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:51,893 INFO L85 PathProgramCache]: Analyzing trace with hash 291174387, now seen corresponding path program 282 times [2022-03-03 19:08:51,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:51,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077413793] [2022-03-03 19:08:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:51,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:52,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:52,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077413793] [2022-03-03 19:08:52,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077413793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:52,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367569710] [2022-03-03 19:08:52,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:08:52,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:52,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:52,056 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) [2022-03-03 19:08:52,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-03 19:08:52,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:08:52,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:52,165 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 [2022-03-03 19:08:52,246 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 [2022-03-03 19:08:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:52,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:52,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:52,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-03 19:08:52,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:52,908 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 31 treesize of output 33 [2022-03-03 19:08:52,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:52,911 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 25 treesize of output 27 [2022-03-03 19:08:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:52,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367569710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:52,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:52,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:08:52,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951769623] [2022-03-03 19:08:52,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:52,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:08:52,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:08:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:08:52,933 INFO L87 Difference]: Start difference. First operand 1836 states and 6092 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2022-03-03 19:08:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:53,309 INFO L93 Difference]: Finished difference Result 2379 states and 7775 transitions. [2022-03-03 19:08:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:08:53,309 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 24 [2022-03-03 19:08:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:53,313 INFO L225 Difference]: With dead ends: 2379 [2022-03-03 19:08:53,313 INFO L226 Difference]: Without dead ends: 2317 [2022-03-03 19:08:53,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:53,314 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:53,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 215 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:08:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-03-03 19:08:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1836. [2022-03-03 19:08:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 3.319891008174387) internal successors, (6092), 1835 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6092 transitions. [2022-03-03 19:08:53,345 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6092 transitions. Word has length 24 [2022-03-03 19:08:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:53,345 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 6092 transitions. [2022-03-03 19:08:53,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2022-03-03 19:08:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6092 transitions. [2022-03-03 19:08:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:53,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:53,348 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:53,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-03-03 19:08:53,548 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,SelfDestructingSolverStorable297 [2022-03-03 19:08:53,548 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:53,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:53,549 INFO L85 PathProgramCache]: Analyzing trace with hash 892806561, now seen corresponding path program 283 times [2022-03-03 19:08:53,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:53,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482048030] [2022-03-03 19:08:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:53,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:53,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:53,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482048030] [2022-03-03 19:08:53,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482048030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:53,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457113337] [2022-03-03 19:08:53,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:08:53,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:53,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:53,770 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) [2022-03-03 19:08:53,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-03 19:08:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:53,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:08:53,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:53,854 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 35 [2022-03-03 19:08:53,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:53,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-03 19:08:53,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:53,978 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 37 treesize of output 21 [2022-03-03 19:08:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:54,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:54,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:54,821 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-03-03 19:08:54,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:54,933 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:08:54,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:54,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:08:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:54,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457113337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:54,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:54,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:54,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243029020] [2022-03-03 19:08:54,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:54,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:54,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:54,957 INFO L87 Difference]: Start difference. First operand 1836 states and 6092 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:56,667 INFO L93 Difference]: Finished difference Result 2777 states and 8767 transitions. [2022-03-03 19:08:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:08:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:56,672 INFO L225 Difference]: With dead ends: 2777 [2022-03-03 19:08:56,672 INFO L226 Difference]: Without dead ends: 2573 [2022-03-03 19:08:56,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:08:56,672 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 301 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:56,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 462 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 950 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-03-03 19:08:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2022-03-03 19:08:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 1838. [2022-03-03 19:08:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 3.3206314643440393) internal successors, (6100), 1837 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 6100 transitions. [2022-03-03 19:08:56,700 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 6100 transitions. Word has length 24 [2022-03-03 19:08:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:56,700 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 6100 transitions. [2022-03-03 19:08:56,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 6100 transitions. [2022-03-03 19:08:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:56,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:56,703 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:56,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-03-03 19:08:56,903 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,SelfDestructingSolverStorable298 [2022-03-03 19:08:56,903 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:56,903 INFO L85 PathProgramCache]: Analyzing trace with hash 777285847, now seen corresponding path program 284 times [2022-03-03 19:08:56,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:56,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507604115] [2022-03-03 19:08:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:56,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:57,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:57,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507604115] [2022-03-03 19:08:57,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507604115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:57,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669466668] [2022-03-03 19:08:57,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:08:57,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:57,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:57,124 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) [2022-03-03 19:08:57,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-03 19:08:57,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:08:57,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:57,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:57,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:57,205 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 35 [2022-03-03 19:08:57,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:57,358 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:08:57,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:57,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:08:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:57,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:58,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:58,204 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 120 treesize of output 104 [2022-03-03 19:08:58,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:58,295 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 31 treesize of output 33 [2022-03-03 19:08:58,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:58,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:08:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:58,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669466668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:58,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:58,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:08:58,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478349864] [2022-03-03 19:08:58,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:58,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:08:58,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:58,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:08:58,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:58,318 INFO L87 Difference]: Start difference. First operand 1838 states and 6100 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:58,850 INFO L93 Difference]: Finished difference Result 2361 states and 7800 transitions. [2022-03-03 19:08:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:08:58,850 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:08:58,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:58,854 INFO L225 Difference]: With dead ends: 2361 [2022-03-03 19:08:58,854 INFO L226 Difference]: Without dead ends: 2330 [2022-03-03 19:08:58,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:08:58,854 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:58,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 218 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 549 Invalid, 0 Unknown, 252 Unchecked, 0.3s Time] [2022-03-03 19:08:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2022-03-03 19:08:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1848. [2022-03-03 19:08:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.3243096913914454) internal successors, (6140), 1847 states have internal predecessors, (6140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6140 transitions. [2022-03-03 19:08:58,878 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6140 transitions. Word has length 24 [2022-03-03 19:08:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:58,878 INFO L470 AbstractCegarLoop]: Abstraction has 1848 states and 6140 transitions. [2022-03-03 19:08:58,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6140 transitions. [2022-03-03 19:08:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:08:58,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:58,880 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:58,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-03 19:08:59,081 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,SelfDestructingSolverStorable299 [2022-03-03 19:08:59,081 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:59,081 INFO L85 PathProgramCache]: Analyzing trace with hash -771278327, now seen corresponding path program 285 times [2022-03-03 19:08:59,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:59,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821468644] [2022-03-03 19:08:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:59,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:08:59,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:59,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821468644] [2022-03-03 19:08:59,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821468644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:59,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982794308] [2022-03-03 19:08:59,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:08:59,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:59,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:59,264 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) [2022-03-03 19:08:59,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-03 19:08:59,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:08:59,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:59,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:08:59,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:59,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:59,356 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 41 treesize of output 35 [2022-03-03 19:08:59,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:59,934 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-03 19:08:59,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:59,951 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 26 treesize of output 8 [2022-03-03 19:09:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:00,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:00,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:00,707 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 120 treesize of output 104 [2022-03-03 19:09:00,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:00,815 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 31 treesize of output 33 [2022-03-03 19:09:00,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:00,818 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:09:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:00,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982794308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:00,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:00,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:09:00,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227699590] [2022-03-03 19:09:00,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:00,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:09:00,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:00,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:09:00,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:09:00,842 INFO L87 Difference]: Start difference. First operand 1848 states and 6140 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-03-03 19:09:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:01,083 INFO L93 Difference]: Finished difference Result 1976 states and 6497 transitions. [2022-03-03 19:09:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:09:01,083 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-03-03 19:09:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:01,087 INFO L225 Difference]: With dead ends: 1976 [2022-03-03 19:09:01,087 INFO L226 Difference]: Without dead ends: 1945 [2022-03-03 19:09:01,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:09:01,087 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:01,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 258 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 588 Invalid, 0 Unknown, 504 Unchecked, 0.2s Time] [2022-03-03 19:09:01,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-03-03 19:09:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1841. [2022-03-03 19:09:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3217391304347825) internal successors, (6112), 1840 states have internal predecessors, (6112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6112 transitions. [2022-03-03 19:09:01,108 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6112 transitions. Word has length 24 [2022-03-03 19:09:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:01,108 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 6112 transitions. [2022-03-03 19:09:01,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-03-03 19:09:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6112 transitions. [2022-03-03 19:09:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:01,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:01,110 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:01,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-03 19:09:01,311 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,SelfDestructingSolverStorable300 [2022-03-03 19:09:01,311 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1255681097, now seen corresponding path program 286 times [2022-03-03 19:09:01,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:01,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975579302] [2022-03-03 19:09:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:01,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:01,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:01,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975579302] [2022-03-03 19:09:01,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975579302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:01,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520270137] [2022-03-03 19:09:01,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:01,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:01,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:01,498 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) [2022-03-03 19:09:01,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-03 19:09:01,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:01,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:01,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:09:01,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:01,576 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 35 [2022-03-03 19:09:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:01,817 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 58 treesize of output 50 [2022-03-03 19:09:01,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:01,819 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 51 treesize of output 25 [2022-03-03 19:09:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:01,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:02,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:02,454 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 78 treesize of output 70 [2022-03-03 19:09:02,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:02,554 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 35 treesize of output 37 [2022-03-03 19:09:02,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:02,558 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:09:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:02,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520270137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:02,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:02,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:02,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630252799] [2022-03-03 19:09:02,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:02,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:02,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:02,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:02,582 INFO L87 Difference]: Start difference. First operand 1841 states and 6112 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:03,688 INFO L93 Difference]: Finished difference Result 2479 states and 7942 transitions. [2022-03-03 19:09:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:09:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:03,692 INFO L225 Difference]: With dead ends: 2479 [2022-03-03 19:09:03,692 INFO L226 Difference]: Without dead ends: 2350 [2022-03-03 19:09:03,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:09:03,693 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 230 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:03,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 341 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 826 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2022-03-03 19:09:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2022-03-03 19:09:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1843. [2022-03-03 19:09:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 3.320846905537459) internal successors, (6117), 1842 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 6117 transitions. [2022-03-03 19:09:03,717 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 6117 transitions. Word has length 24 [2022-03-03 19:09:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:03,717 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 6117 transitions. [2022-03-03 19:09:03,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 6117 transitions. [2022-03-03 19:09:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:03,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:03,719 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:03,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-03 19:09:03,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-03 19:09:03,920 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash -566670911, now seen corresponding path program 287 times [2022-03-03 19:09:03,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:03,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685034299] [2022-03-03 19:09:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:04,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:04,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685034299] [2022-03-03 19:09:04,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685034299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:04,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248163425] [2022-03-03 19:09:04,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:04,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:04,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:04,055 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) [2022-03-03 19:09:04,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-03 19:09:04,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:09:04,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:04,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:04,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:04,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:04,140 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 [2022-03-03 19:09:04,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:04,567 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 23 treesize of output 19 [2022-03-03 19:09:04,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:04,570 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 12 treesize of output 3 [2022-03-03 19:09:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:04,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:05,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:05,093 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 50 treesize of output 47 [2022-03-03 19:09:05,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:05,145 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 31 treesize of output 33 [2022-03-03 19:09:05,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:05,148 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 25 treesize of output 27 [2022-03-03 19:09:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:05,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248163425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:05,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:05,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:05,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516176669] [2022-03-03 19:09:05,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:05,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:05,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:05,176 INFO L87 Difference]: Start difference. First operand 1843 states and 6117 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:05,536 INFO L93 Difference]: Finished difference Result 2059 states and 6704 transitions. [2022-03-03 19:09:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:09:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:05,540 INFO L225 Difference]: With dead ends: 2059 [2022-03-03 19:09:05,540 INFO L226 Difference]: Without dead ends: 1986 [2022-03-03 19:09:05,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:09:05,540 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:05,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 233 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 599 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-03-03 19:09:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2022-03-03 19:09:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1845. [2022-03-03 19:09:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 3.321583514099783) internal successors, (6125), 1844 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 6125 transitions. [2022-03-03 19:09:05,562 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 6125 transitions. Word has length 24 [2022-03-03 19:09:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:05,563 INFO L470 AbstractCegarLoop]: Abstraction has 1845 states and 6125 transitions. [2022-03-03 19:09:05,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 6125 transitions. [2022-03-03 19:09:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:05,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:05,565 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:05,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-03-03 19:09:05,765 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,SelfDestructingSolverStorable302 [2022-03-03 19:09:05,765 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash 615280617, now seen corresponding path program 288 times [2022-03-03 19:09:05,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:05,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892817163] [2022-03-03 19:09:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:05,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:05,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:05,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892817163] [2022-03-03 19:09:05,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892817163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:05,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638054815] [2022-03-03 19:09:05,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:05,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:05,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:05,976 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) [2022-03-03 19:09:05,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-03 19:09:06,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:09:06,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:06,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:06,058 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 35 [2022-03-03 19:09:06,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:06,194 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:09:06,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:06,197 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 12 treesize of output 3 [2022-03-03 19:09:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:06,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:07,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:07,007 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 120 treesize of output 104 [2022-03-03 19:09:07,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:07,143 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 31 treesize of output 33 [2022-03-03 19:09:07,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:07,147 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 25 treesize of output 27 [2022-03-03 19:09:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:07,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638054815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:07,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:07,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:07,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180726518] [2022-03-03 19:09:07,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:07,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:07,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:07,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:07,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:07,166 INFO L87 Difference]: Start difference. First operand 1845 states and 6125 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:07,913 INFO L93 Difference]: Finished difference Result 2477 states and 8225 transitions. [2022-03-03 19:09:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:09:07,914 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:07,918 INFO L225 Difference]: With dead ends: 2477 [2022-03-03 19:09:07,918 INFO L226 Difference]: Without dead ends: 2392 [2022-03-03 19:09:07,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:09:07,918 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:07,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 322 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 834 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2022-03-03 19:09:07,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2022-03-03 19:09:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 1859. [2022-03-03 19:09:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 3.3266953713670615) internal successors, (6181), 1858 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 6181 transitions. [2022-03-03 19:09:07,946 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 6181 transitions. Word has length 24 [2022-03-03 19:09:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:07,946 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 6181 transitions. [2022-03-03 19:09:07,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 6181 transitions. [2022-03-03 19:09:07,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:07,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:07,948 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:07,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:08,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:08,149 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:08,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1304290803, now seen corresponding path program 289 times [2022-03-03 19:09:08,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:08,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524213868] [2022-03-03 19:09:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:08,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:08,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:08,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524213868] [2022-03-03 19:09:08,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524213868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:08,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441367138] [2022-03-03 19:09:08,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:08,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:08,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:08,356 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) [2022-03-03 19:09:08,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-03 19:09:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:09:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:08,437 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 41 treesize of output 35 [2022-03-03 19:09:08,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:08,594 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:09:08,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:08,596 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 12 treesize of output 3 [2022-03-03 19:09:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:08,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:09,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:09,310 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-03-03 19:09:09,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:09,428 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 35 treesize of output 37 [2022-03-03 19:09:09,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:09,432 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 29 treesize of output 31 [2022-03-03 19:09:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:09,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441367138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:09,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:09,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:09,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577147313] [2022-03-03 19:09:09,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:09,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:09,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:09,452 INFO L87 Difference]: Start difference. First operand 1859 states and 6181 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:10,215 INFO L93 Difference]: Finished difference Result 2928 states and 9624 transitions. [2022-03-03 19:09:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:09:10,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:10,220 INFO L225 Difference]: With dead ends: 2928 [2022-03-03 19:09:10,220 INFO L226 Difference]: Without dead ends: 2897 [2022-03-03 19:09:10,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:09:10,221 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:10,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 340 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 838 Invalid, 0 Unknown, 495 Unchecked, 0.3s Time] [2022-03-03 19:09:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-03-03 19:09:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1872. [2022-03-03 19:09:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 3.331373597006948) internal successors, (6233), 1871 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 6233 transitions. [2022-03-03 19:09:10,250 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 6233 transitions. Word has length 24 [2022-03-03 19:09:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:10,250 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 6233 transitions. [2022-03-03 19:09:10,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 6233 transitions. [2022-03-03 19:09:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:10,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:10,253 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:10,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:10,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-03 19:09:10,453 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1281038707, now seen corresponding path program 290 times [2022-03-03 19:09:10,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:10,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975602550] [2022-03-03 19:09:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:10,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:10,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:10,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975602550] [2022-03-03 19:09:10,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975602550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:10,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549058933] [2022-03-03 19:09:10,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:10,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:10,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:10,648 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) [2022-03-03 19:09:10,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-03 19:09:10,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:10,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:10,725 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 35 [2022-03-03 19:09:10,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:10,898 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:09:10,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:10,901 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:09:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:11,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:11,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:11,746 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 120 treesize of output 104 [2022-03-03 19:09:11,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:11,860 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 31 treesize of output 33 [2022-03-03 19:09:11,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:11,864 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:09:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:11,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549058933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:11,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:11,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:11,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761930557] [2022-03-03 19:09:11,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:11,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:11,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:11,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:11,883 INFO L87 Difference]: Start difference. First operand 1872 states and 6233 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:12,488 INFO L93 Difference]: Finished difference Result 2464 states and 8221 transitions. [2022-03-03 19:09:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:09:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:12,492 INFO L225 Difference]: With dead ends: 2464 [2022-03-03 19:09:12,493 INFO L226 Difference]: Without dead ends: 2414 [2022-03-03 19:09:12,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:09:12,493 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 115 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:12,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 306 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 830 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-03-03 19:09:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2022-03-03 19:09:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1872. [2022-03-03 19:09:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 3.331373597006948) internal successors, (6233), 1871 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 6233 transitions. [2022-03-03 19:09:12,518 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 6233 transitions. Word has length 24 [2022-03-03 19:09:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:12,518 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 6233 transitions. [2022-03-03 19:09:12,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 6233 transitions. [2022-03-03 19:09:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:12,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:12,520 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:12,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:12,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-03-03 19:09:12,721 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:12,721 INFO L85 PathProgramCache]: Analyzing trace with hash -933283557, now seen corresponding path program 291 times [2022-03-03 19:09:12,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:12,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299749938] [2022-03-03 19:09:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:12,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:12,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:12,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299749938] [2022-03-03 19:09:12,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299749938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:12,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547024688] [2022-03-03 19:09:12,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:12,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:12,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:12,897 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) [2022-03-03 19:09:12,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-03 19:09:12,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:09:12,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:09:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:12,978 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 41 treesize of output 35 [2022-03-03 19:09:13,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:13,264 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 29 treesize of output 23 [2022-03-03 19:09:13,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:13,267 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 25 treesize of output 12 [2022-03-03 19:09:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:13,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:13,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:13,893 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 78 treesize of output 70 [2022-03-03 19:09:13,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:13,989 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 35 treesize of output 37 [2022-03-03 19:09:13,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:13,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:09:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:14,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547024688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:14,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:14,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:14,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159280303] [2022-03-03 19:09:14,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:14,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:14,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:14,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:14,017 INFO L87 Difference]: Start difference. First operand 1872 states and 6233 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:14,371 INFO L93 Difference]: Finished difference Result 2471 states and 8253 transitions. [2022-03-03 19:09:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:09:14,372 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:14,376 INFO L225 Difference]: With dead ends: 2471 [2022-03-03 19:09:14,376 INFO L226 Difference]: Without dead ends: 2371 [2022-03-03 19:09:14,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:09:14,376 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 106 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:14,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 304 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 749 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2022-03-03 19:09:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2022-03-03 19:09:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1889. [2022-03-03 19:09:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 3.3342161016949152) internal successors, (6295), 1888 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6295 transitions. [2022-03-03 19:09:14,413 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6295 transitions. Word has length 24 [2022-03-03 19:09:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:14,413 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 6295 transitions. [2022-03-03 19:09:14,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6295 transitions. [2022-03-03 19:09:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:14,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:14,416 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:14,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-03-03 19:09:14,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:14,619 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1576019039, now seen corresponding path program 292 times [2022-03-03 19:09:14,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:14,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645163267] [2022-03-03 19:09:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:14,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:14,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:14,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645163267] [2022-03-03 19:09:14,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645163267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:14,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486927669] [2022-03-03 19:09:14,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:14,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:14,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:14,745 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) [2022-03-03 19:09:14,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-03 19:09:14,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:14,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:14,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:09:14,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:14,816 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 35 [2022-03-03 19:09:14,972 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 [2022-03-03 19:09:14,974 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 [2022-03-03 19:09:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:15,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:15,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:15,487 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 78 treesize of output 70 [2022-03-03 19:09:15,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:15,582 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 35 treesize of output 37 [2022-03-03 19:09:15,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:15,586 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 29 treesize of output 31 [2022-03-03 19:09:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:15,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486927669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:15,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:15,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:15,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64062728] [2022-03-03 19:09:15,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:15,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:15,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:15,602 INFO L87 Difference]: Start difference. First operand 1889 states and 6295 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:16,920 INFO L93 Difference]: Finished difference Result 3643 states and 11683 transitions. [2022-03-03 19:09:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:09:16,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:16,926 INFO L225 Difference]: With dead ends: 3643 [2022-03-03 19:09:16,927 INFO L226 Difference]: Without dead ends: 3479 [2022-03-03 19:09:16,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:09:16,927 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 302 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:16,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 449 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:09:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2022-03-03 19:09:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 1894. [2022-03-03 19:09:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 3.325937665081881) internal successors, (6296), 1893 states have internal predecessors, (6296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 6296 transitions. [2022-03-03 19:09:16,961 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 6296 transitions. Word has length 24 [2022-03-03 19:09:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:16,961 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 6296 transitions. [2022-03-03 19:09:16,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 6296 transitions. [2022-03-03 19:09:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:16,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:16,963 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:16,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:17,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2022-03-03 19:09:17,164 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1742721873, now seen corresponding path program 293 times [2022-03-03 19:09:17,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:17,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664121987] [2022-03-03 19:09:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:17,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:17,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:17,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664121987] [2022-03-03 19:09:17,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664121987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:17,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747574621] [2022-03-03 19:09:17,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:17,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:17,348 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) [2022-03-03 19:09:17,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-03 19:09:17,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:09:17,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:17,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:17,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:17,427 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 41 treesize of output 35 [2022-03-03 19:09:17,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:17,635 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 49 treesize of output 41 [2022-03-03 19:09:17,637 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 13 treesize of output 9 [2022-03-03 19:09:17,641 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 25 treesize of output 17 [2022-03-03 19:09:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:17,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:18,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:18,232 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 120 treesize of output 104 [2022-03-03 19:09:18,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:18,330 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:09:18,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:18,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:09:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:18,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747574621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:18,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:18,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:18,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179433899] [2022-03-03 19:09:18,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:18,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:18,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:18,356 INFO L87 Difference]: Start difference. First operand 1894 states and 6296 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:19,213 INFO L93 Difference]: Finished difference Result 2689 states and 8518 transitions. [2022-03-03 19:09:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:09:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:19,218 INFO L225 Difference]: With dead ends: 2689 [2022-03-03 19:09:19,218 INFO L226 Difference]: Without dead ends: 2576 [2022-03-03 19:09:19,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:09:19,218 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 136 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:19,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 346 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 856 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-03-03 19:09:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2022-03-03 19:09:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1896. [2022-03-03 19:09:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.325065963060686) internal successors, (6301), 1895 states have internal predecessors, (6301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6301 transitions. [2022-03-03 19:09:19,244 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6301 transitions. Word has length 24 [2022-03-03 19:09:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:19,244 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 6301 transitions. [2022-03-03 19:09:19,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6301 transitions. [2022-03-03 19:09:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:19,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:19,247 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:19,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:19,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:19,447 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1959470161, now seen corresponding path program 294 times [2022-03-03 19:09:19,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:19,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098791464] [2022-03-03 19:09:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:19,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:19,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:19,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098791464] [2022-03-03 19:09:19,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098791464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:19,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123473782] [2022-03-03 19:09:19,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:19,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:19,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:19,614 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) [2022-03-03 19:09:19,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-03 19:09:19,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:09:19,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:19,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:19,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:19,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:19,688 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 41 treesize of output 35 [2022-03-03 19:09:19,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:19,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2022-03-03 19:09:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:20,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:20,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:20,526 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 120 treesize of output 104 [2022-03-03 19:09:20,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:20,621 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:09:20,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:20,624 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 25 treesize of output 27 [2022-03-03 19:09:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:20,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123473782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:20,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:20,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:09:20,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555791480] [2022-03-03 19:09:20,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:20,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:09:20,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:09:20,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:09:20,644 INFO L87 Difference]: Start difference. First operand 1896 states and 6301 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2022-03-03 19:09:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:21,489 INFO L93 Difference]: Finished difference Result 2805 states and 9043 transitions. [2022-03-03 19:09:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:09:21,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2022-03-03 19:09:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:21,494 INFO L225 Difference]: With dead ends: 2805 [2022-03-03 19:09:21,494 INFO L226 Difference]: Without dead ends: 2719 [2022-03-03 19:09:21,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:09:21,494 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 155 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:21,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 327 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 741 Invalid, 0 Unknown, 233 Unchecked, 0.3s Time] [2022-03-03 19:09:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2022-03-03 19:09:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 1908. [2022-03-03 19:09:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 3.3230204509701102) internal successors, (6337), 1907 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 6337 transitions. [2022-03-03 19:09:21,521 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 6337 transitions. Word has length 24 [2022-03-03 19:09:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:21,521 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 6337 transitions. [2022-03-03 19:09:21,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2022-03-03 19:09:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 6337 transitions. [2022-03-03 19:09:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:21,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:21,524 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:21,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:21,724 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,SelfDestructingSolverStorable309 [2022-03-03 19:09:21,725 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2011254575, now seen corresponding path program 295 times [2022-03-03 19:09:21,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:21,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734038422] [2022-03-03 19:09:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:21,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:21,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:21,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734038422] [2022-03-03 19:09:21,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734038422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:21,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439558149] [2022-03-03 19:09:21,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:21,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:21,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:21,890 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) [2022-03-03 19:09:21,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-03 19:09:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:21,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:09:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:21,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:21,963 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 41 treesize of output 35 [2022-03-03 19:09:22,194 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 [2022-03-03 19:09:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:22,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:22,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:22,740 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-03 19:09:22,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:22,823 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:09:22,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:22,827 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 29 treesize of output 31 [2022-03-03 19:09:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:22,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439558149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:22,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:22,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:09:22,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269159954] [2022-03-03 19:09:22,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:22,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:09:22,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:09:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:09:22,847 INFO L87 Difference]: Start difference. First operand 1908 states and 6337 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:23,320 INFO L93 Difference]: Finished difference Result 2435 states and 7905 transitions. [2022-03-03 19:09:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:09:23,320 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:23,324 INFO L225 Difference]: With dead ends: 2435 [2022-03-03 19:09:23,324 INFO L226 Difference]: Without dead ends: 2364 [2022-03-03 19:09:23,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:09:23,325 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:23,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 369 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1014 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-03-03 19:09:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2022-03-03 19:09:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1926. [2022-03-03 19:09:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.3132467532467533) internal successors, (6378), 1925 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 6378 transitions. [2022-03-03 19:09:23,348 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 6378 transitions. Word has length 24 [2022-03-03 19:09:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:23,348 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 6378 transitions. [2022-03-03 19:09:23,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 6378 transitions. [2022-03-03 19:09:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:23,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:23,350 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:23,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:23,551 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,SelfDestructingSolverStorable310 [2022-03-03 19:09:23,551 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:23,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1669178643, now seen corresponding path program 296 times [2022-03-03 19:09:23,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:23,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137129871] [2022-03-03 19:09:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:23,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:23,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:23,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137129871] [2022-03-03 19:09:23,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137129871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:23,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830931373] [2022-03-03 19:09:23,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:23,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:23,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:23,696 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) [2022-03-03 19:09:23,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-03 19:09:23,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:23,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:23,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:23,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:23,839 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 23 treesize of output 19 [2022-03-03 19:09:23,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:23,949 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 41 treesize of output 35 [2022-03-03 19:09:23,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:23,952 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 37 treesize of output 21 [2022-03-03 19:09:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:24,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:24,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:24,671 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 102 treesize of output 96 [2022-03-03 19:09:24,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:24,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2022-03-03 19:09:24,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:24,980 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 101 treesize of output 85 [2022-03-03 19:09:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:25,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830931373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:25,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:25,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:25,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439768780] [2022-03-03 19:09:25,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:25,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:25,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:25,066 INFO L87 Difference]: Start difference. First operand 1926 states and 6378 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:25,573 INFO L93 Difference]: Finished difference Result 2081 states and 6798 transitions. [2022-03-03 19:09:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:09:25,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:25,577 INFO L225 Difference]: With dead ends: 2081 [2022-03-03 19:09:25,577 INFO L226 Difference]: Without dead ends: 1997 [2022-03-03 19:09:25,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:09:25,577 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:25,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 229 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 803 Invalid, 0 Unknown, 244 Unchecked, 0.3s Time] [2022-03-03 19:09:25,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2022-03-03 19:09:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1932. [2022-03-03 19:09:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.3153806317969963) internal successors, (6402), 1931 states have internal predecessors, (6402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6402 transitions. [2022-03-03 19:09:25,600 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6402 transitions. Word has length 24 [2022-03-03 19:09:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:25,600 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 6402 transitions. [2022-03-03 19:09:25,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6402 transitions. [2022-03-03 19:09:25,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:25,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:25,603 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:25,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-03 19:09:25,803 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,SelfDestructingSolverStorable311 [2022-03-03 19:09:25,803 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:25,804 INFO L85 PathProgramCache]: Analyzing trace with hash -343886093, now seen corresponding path program 297 times [2022-03-03 19:09:25,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:25,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517982091] [2022-03-03 19:09:25,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:25,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:26,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:26,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517982091] [2022-03-03 19:09:26,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517982091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:26,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282346015] [2022-03-03 19:09:26,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:26,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:26,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:26,012 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) [2022-03-03 19:09:26,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-03 19:09:26,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:09:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:26,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:26,157 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 [2022-03-03 19:09:26,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:26,309 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 55 treesize of output 47 [2022-03-03 19:09:26,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:26,312 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:09:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:26,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:26,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:26,873 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 102 treesize of output 96 [2022-03-03 19:09:27,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:27,124 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 123 treesize of output 107 [2022-03-03 19:09:27,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:27,129 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-03 19:09:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:27,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282346015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:27,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:27,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:09:27,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543646438] [2022-03-03 19:09:27,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:27,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:09:27,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:09:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:09:27,244 INFO L87 Difference]: Start difference. First operand 1932 states and 6402 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2022-03-03 19:09:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:27,650 INFO L93 Difference]: Finished difference Result 2022 states and 6650 transitions. [2022-03-03 19:09:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:09:27,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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 24 [2022-03-03 19:09:27,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:27,654 INFO L225 Difference]: With dead ends: 2022 [2022-03-03 19:09:27,654 INFO L226 Difference]: Without dead ends: 1983 [2022-03-03 19:09:27,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:09:27,654 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:27,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 235 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 617 Invalid, 0 Unknown, 255 Unchecked, 0.3s Time] [2022-03-03 19:09:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2022-03-03 19:09:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1932. [2022-03-03 19:09:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.314344899016054) internal successors, (6400), 1931 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6400 transitions. [2022-03-03 19:09:27,677 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6400 transitions. Word has length 24 [2022-03-03 19:09:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:27,677 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 6400 transitions. [2022-03-03 19:09:27,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2022-03-03 19:09:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6400 transitions. [2022-03-03 19:09:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:27,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:27,679 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:27,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:27,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-03 19:09:27,880 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:27,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1977729487, now seen corresponding path program 298 times [2022-03-03 19:09:27,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:27,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210686360] [2022-03-03 19:09:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:27,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:28,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:28,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210686360] [2022-03-03 19:09:28,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210686360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:28,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465098811] [2022-03-03 19:09:28,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:28,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:28,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:28,146 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) [2022-03-03 19:09:28,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-03 19:09:28,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:28,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:28,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:28,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:28,276 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 [2022-03-03 19:09:28,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:28,332 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 42 treesize of output 36 [2022-03-03 19:09:28,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:28,335 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:09:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:28,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:29,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:29,126 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 102 treesize of output 96 [2022-03-03 19:09:29,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:29,441 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-03 19:09:29,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:29,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 87 [2022-03-03 19:09:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:29,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465098811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:29,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:29,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:29,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513027975] [2022-03-03 19:09:29,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:29,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:29,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:29,510 INFO L87 Difference]: Start difference. First operand 1932 states and 6400 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:30,032 INFO L93 Difference]: Finished difference Result 2076 states and 6798 transitions. [2022-03-03 19:09:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:09:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:30,035 INFO L225 Difference]: With dead ends: 2076 [2022-03-03 19:09:30,035 INFO L226 Difference]: Without dead ends: 2010 [2022-03-03 19:09:30,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:09:30,036 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:30,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 209 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 664 Invalid, 0 Unknown, 226 Unchecked, 0.3s Time] [2022-03-03 19:09:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-03-03 19:09:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1932. [2022-03-03 19:09:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.314344899016054) internal successors, (6400), 1931 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6400 transitions. [2022-03-03 19:09:30,057 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6400 transitions. Word has length 24 [2022-03-03 19:09:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:30,057 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 6400 transitions. [2022-03-03 19:09:30,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6400 transitions. [2022-03-03 19:09:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:30,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:30,059 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:30,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:30,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:30,260 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash -55237457, now seen corresponding path program 299 times [2022-03-03 19:09:30,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:30,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801768009] [2022-03-03 19:09:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:30,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:30,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:30,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801768009] [2022-03-03 19:09:30,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801768009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:30,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325317867] [2022-03-03 19:09:30,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:30,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:30,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:30,491 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) [2022-03-03 19:09:30,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-03 19:09:30,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:09:30,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:30,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:30,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:30,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:30,644 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 23 treesize of output 19 [2022-03-03 19:09:30,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:30,794 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 41 treesize of output 35 [2022-03-03 19:09:30,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:30,796 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 37 treesize of output 21 [2022-03-03 19:09:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:30,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:31,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:31,300 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 100 treesize of output 94 [2022-03-03 19:09:31,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:31,587 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 126 treesize of output 110 [2022-03-03 19:09:31,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:31,592 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-03 19:09:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:31,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325317867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:31,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:31,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:31,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727475368] [2022-03-03 19:09:31,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:31,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:31,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:31,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:31,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:31,689 INFO L87 Difference]: Start difference. First operand 1932 states and 6400 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:32,138 INFO L93 Difference]: Finished difference Result 2022 states and 6648 transitions. [2022-03-03 19:09:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:09:32,138 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:32,141 INFO L225 Difference]: With dead ends: 2022 [2022-03-03 19:09:32,141 INFO L226 Difference]: Without dead ends: 1983 [2022-03-03 19:09:32,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:09:32,142 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:32,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 304 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 617 Invalid, 0 Unknown, 420 Unchecked, 0.3s Time] [2022-03-03 19:09:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2022-03-03 19:09:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1932. [2022-03-03 19:09:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.314344899016054) internal successors, (6400), 1931 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6400 transitions. [2022-03-03 19:09:32,162 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6400 transitions. Word has length 24 [2022-03-03 19:09:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:32,162 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 6400 transitions. [2022-03-03 19:09:32,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6400 transitions. [2022-03-03 19:09:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:32,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:32,165 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:32,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:32,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:32,365 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:32,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1153662861, now seen corresponding path program 300 times [2022-03-03 19:09:32,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:32,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27284773] [2022-03-03 19:09:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:32,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:32,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27284773] [2022-03-03 19:09:32,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27284773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:32,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703913609] [2022-03-03 19:09:32,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:32,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:32,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:32,634 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) [2022-03-03 19:09:32,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-03 19:09:32,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:09:32,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:32,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:32,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:32,773 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 23 treesize of output 19 [2022-03-03 19:09:32,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:32,868 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 55 treesize of output 47 [2022-03-03 19:09:32,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:32,870 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 37 treesize of output 21 [2022-03-03 19:09:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:32,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:33,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:33,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 94 [2022-03-03 19:09:33,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:33,705 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 126 treesize of output 110 [2022-03-03 19:09:33,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:33,710 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 102 treesize of output 86 [2022-03-03 19:09:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:33,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703913609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:33,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:33,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:33,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419494227] [2022-03-03 19:09:33,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:33,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:33,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:33,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:33,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:33,783 INFO L87 Difference]: Start difference. First operand 1932 states and 6400 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:34,274 INFO L93 Difference]: Finished difference Result 2046 states and 6710 transitions. [2022-03-03 19:09:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:09:34,274 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:34,278 INFO L225 Difference]: With dead ends: 2046 [2022-03-03 19:09:34,278 INFO L226 Difference]: Without dead ends: 2011 [2022-03-03 19:09:34,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:09:34,278 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:34,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 210 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 580 Invalid, 0 Unknown, 257 Unchecked, 0.3s Time] [2022-03-03 19:09:34,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-03-03 19:09:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1932. [2022-03-03 19:09:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.314344899016054) internal successors, (6400), 1931 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6400 transitions. [2022-03-03 19:09:34,308 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6400 transitions. Word has length 24 [2022-03-03 19:09:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:34,308 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 6400 transitions. [2022-03-03 19:09:34,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:34,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6400 transitions. [2022-03-03 19:09:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:34,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:34,311 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:34,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-03-03 19:09:34,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:34,511 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1911963491, now seen corresponding path program 301 times [2022-03-03 19:09:34,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:34,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637178681] [2022-03-03 19:09:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:34,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:34,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637178681] [2022-03-03 19:09:34,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637178681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:34,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330530963] [2022-03-03 19:09:34,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:34,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:34,756 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) [2022-03-03 19:09:34,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-03 19:09:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:09:34,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:34,880 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 35 [2022-03-03 19:09:34,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:34,952 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 43 treesize of output 37 [2022-03-03 19:09:34,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:34,954 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 37 treesize of output 21 [2022-03-03 19:09:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:35,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:35,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:35,782 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 77 treesize of output 75 [2022-03-03 19:09:35,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:35,926 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 78 treesize of output 72 [2022-03-03 19:09:35,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:35,931 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2022-03-03 19:09:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:35,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330530963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:35,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:35,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:35,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860447768] [2022-03-03 19:09:35,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:35,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:35,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:35,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:35,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:35,987 INFO L87 Difference]: Start difference. First operand 1932 states and 6400 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:37,378 INFO L93 Difference]: Finished difference Result 2602 states and 8159 transitions. [2022-03-03 19:09:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:09:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:37,382 INFO L225 Difference]: With dead ends: 2602 [2022-03-03 19:09:37,382 INFO L226 Difference]: Without dead ends: 2429 [2022-03-03 19:09:37,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:09:37,382 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 200 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:37,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 306 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 862 Invalid, 0 Unknown, 70 Unchecked, 0.4s Time] [2022-03-03 19:09:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2022-03-03 19:09:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1943. [2022-03-03 19:09:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 3.3135942327497427) internal successors, (6435), 1942 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 6435 transitions. [2022-03-03 19:09:37,407 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 6435 transitions. Word has length 24 [2022-03-03 19:09:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:37,408 INFO L470 AbstractCegarLoop]: Abstraction has 1943 states and 6435 transitions. [2022-03-03 19:09:37,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 6435 transitions. [2022-03-03 19:09:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:37,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:37,410 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:37,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-03-03 19:09:37,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-03-03 19:09:37,610 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2027484205, now seen corresponding path program 302 times [2022-03-03 19:09:37,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:37,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250083215] [2022-03-03 19:09:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:37,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:37,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:37,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250083215] [2022-03-03 19:09:37,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250083215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:37,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838990248] [2022-03-03 19:09:37,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:37,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:37,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:37,838 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) [2022-03-03 19:09:37,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-03 19:09:37,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:37,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:37,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:37,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:37,966 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 35 [2022-03-03 19:09:38,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:38,061 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 24 treesize of output 20 [2022-03-03 19:09:38,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:38,063 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 15 treesize of output 7 [2022-03-03 19:09:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:38,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:38,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:38,824 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-03-03 19:09:39,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:39,043 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 126 treesize of output 110 [2022-03-03 19:09:39,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:39,048 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 102 treesize of output 86 [2022-03-03 19:09:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:39,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838990248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:39,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:39,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:39,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145483544] [2022-03-03 19:09:39,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:39,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:39,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:39,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:39,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:39,107 INFO L87 Difference]: Start difference. First operand 1943 states and 6435 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:39,393 INFO L93 Difference]: Finished difference Result 2098 states and 6866 transitions. [2022-03-03 19:09:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:09:39,393 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:39,397 INFO L225 Difference]: With dead ends: 2098 [2022-03-03 19:09:39,397 INFO L226 Difference]: Without dead ends: 2036 [2022-03-03 19:09:39,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:09:39,397 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:39,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 207 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 605 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-03-03 19:09:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2022-03-03 19:09:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1950. [2022-03-03 19:09:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.3160595177013854) internal successors, (6463), 1949 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6463 transitions. [2022-03-03 19:09:39,419 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6463 transitions. Word has length 24 [2022-03-03 19:09:39,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:39,419 INFO L470 AbstractCegarLoop]: Abstraction has 1950 states and 6463 transitions. [2022-03-03 19:09:39,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:39,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6463 transitions. [2022-03-03 19:09:39,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:39,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:39,422 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:39,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-03-03 19:09:39,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:39,622 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:39,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:39,622 INFO L85 PathProgramCache]: Analyzing trace with hash 718918917, now seen corresponding path program 303 times [2022-03-03 19:09:39,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:39,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127468551] [2022-03-03 19:09:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:39,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:39,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:39,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127468551] [2022-03-03 19:09:39,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127468551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:39,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427494521] [2022-03-03 19:09:39,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:39,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:39,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:39,830 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) [2022-03-03 19:09:39,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-03 19:09:39,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:09:39,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:39,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:09:39,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:39,959 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 35 [2022-03-03 19:09:40,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:40,190 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-03 19:09:40,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:40,193 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 26 treesize of output 8 [2022-03-03 19:09:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:40,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:40,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:40,785 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 78 treesize of output 74 [2022-03-03 19:09:40,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:40,982 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 86 treesize of output 78 [2022-03-03 19:09:40,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:40,987 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 70 treesize of output 62 [2022-03-03 19:09:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:41,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427494521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:41,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:41,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:41,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306440904] [2022-03-03 19:09:41,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:41,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:41,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:41,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:41,055 INFO L87 Difference]: Start difference. First operand 1950 states and 6463 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:41,532 INFO L93 Difference]: Finished difference Result 2181 states and 7065 transitions. [2022-03-03 19:09:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:09:41,533 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:41,536 INFO L225 Difference]: With dead ends: 2181 [2022-03-03 19:09:41,536 INFO L226 Difference]: Without dead ends: 2104 [2022-03-03 19:09:41,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:09:41,537 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:41,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 258 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 691 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-03-03 19:09:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2022-03-03 19:09:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1964. [2022-03-03 19:09:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.3036169128884363) internal successors, (6485), 1963 states have internal predecessors, (6485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 6485 transitions. [2022-03-03 19:09:41,582 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 6485 transitions. Word has length 24 [2022-03-03 19:09:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 6485 transitions. [2022-03-03 19:09:41,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 6485 transitions. [2022-03-03 19:09:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:41,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:41,584 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:41,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-03 19:09:41,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:41,785 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash 43536989, now seen corresponding path program 304 times [2022-03-03 19:09:41,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:41,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067872386] [2022-03-03 19:09:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:41,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:41,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067872386] [2022-03-03 19:09:41,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067872386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:41,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213970878] [2022-03-03 19:09:41,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:41,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:41,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:41,992 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) [2022-03-03 19:09:41,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-03 19:09:42,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:42,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:42,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:42,121 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 35 [2022-03-03 19:09:42,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:42,366 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-03 19:09:42,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:42,368 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 12 treesize of output 3 [2022-03-03 19:09:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:42,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:43,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:43,027 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 100 treesize of output 94 [2022-03-03 19:09:43,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:43,285 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 129 treesize of output 113 [2022-03-03 19:09:43,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:43,291 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 105 treesize of output 89 [2022-03-03 19:09:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:43,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213970878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:43,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:43,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:43,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469158813] [2022-03-03 19:09:43,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:43,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:43,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:43,381 INFO L87 Difference]: Start difference. First operand 1964 states and 6485 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:43,744 INFO L93 Difference]: Finished difference Result 2088 states and 6816 transitions. [2022-03-03 19:09:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:09:43,744 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:43,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:43,748 INFO L225 Difference]: With dead ends: 2088 [2022-03-03 19:09:43,748 INFO L226 Difference]: Without dead ends: 2061 [2022-03-03 19:09:43,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:43,748 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:43,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 351 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 859 Invalid, 0 Unknown, 274 Unchecked, 0.3s Time] [2022-03-03 19:09:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-03-03 19:09:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1949. [2022-03-03 19:09:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.316221765913758) internal successors, (6460), 1948 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6460 transitions. [2022-03-03 19:09:43,779 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6460 transitions. Word has length 24 [2022-03-03 19:09:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:43,779 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 6460 transitions. [2022-03-03 19:09:43,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6460 transitions. [2022-03-03 19:09:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:43,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:43,781 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:43,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:43,981 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,SelfDestructingSolverStorable319 [2022-03-03 19:09:43,982 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash 234516147, now seen corresponding path program 305 times [2022-03-03 19:09:43,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:43,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832476552] [2022-03-03 19:09:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:43,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:44,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:44,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832476552] [2022-03-03 19:09:44,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832476552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:44,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426165765] [2022-03-03 19:09:44,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:44,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:44,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:44,200 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) [2022-03-03 19:09:44,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-03 19:09:44,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:09:44,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:44,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:44,329 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 35 [2022-03-03 19:09:44,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:44,501 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 55 treesize of output 47 [2022-03-03 19:09:44,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:44,503 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 47 treesize of output 25 [2022-03-03 19:09:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:44,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:45,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:45,070 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-03 19:09:45,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:45,262 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 123 treesize of output 107 [2022-03-03 19:09:45,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:45,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 83 [2022-03-03 19:09:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:45,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426165765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:45,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:45,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:45,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522718489] [2022-03-03 19:09:45,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:45,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:45,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:45,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:45,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:45,333 INFO L87 Difference]: Start difference. First operand 1949 states and 6460 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:45,814 INFO L93 Difference]: Finished difference Result 2136 states and 6914 transitions. [2022-03-03 19:09:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:09:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:45,818 INFO L225 Difference]: With dead ends: 2136 [2022-03-03 19:09:45,818 INFO L226 Difference]: Without dead ends: 2062 [2022-03-03 19:09:45,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:09:45,818 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:45,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 287 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 700 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-03-03 19:09:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-03-03 19:09:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1949. [2022-03-03 19:09:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.316221765913758) internal successors, (6460), 1948 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6460 transitions. [2022-03-03 19:09:45,841 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6460 transitions. Word has length 24 [2022-03-03 19:09:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:45,841 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 6460 transitions. [2022-03-03 19:09:45,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6460 transitions. [2022-03-03 19:09:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:45,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:45,844 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:45,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:46,044 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,SelfDestructingSolverStorable320 [2022-03-03 19:09:46,044 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash 451264435, now seen corresponding path program 306 times [2022-03-03 19:09:46,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:46,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814227812] [2022-03-03 19:09:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:46,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:46,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:46,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814227812] [2022-03-03 19:09:46,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814227812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:46,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327948741] [2022-03-03 19:09:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:46,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:46,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:46,201 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) [2022-03-03 19:09:46,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-03 19:09:46,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:09:46,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:46,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:46,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:46,345 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 41 treesize of output 35 [2022-03-03 19:09:46,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:46,651 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 55 treesize of output 47 [2022-03-03 19:09:46,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:46,654 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 48 treesize of output 26 [2022-03-03 19:09:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:46,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:47,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:47,214 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-03 19:09:47,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:47,415 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-03 19:09:47,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:47,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 83 [2022-03-03 19:09:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:47,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327948741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:47,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:47,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:47,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252752938] [2022-03-03 19:09:47,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:47,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:47,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:47,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:47,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:47,501 INFO L87 Difference]: Start difference. First operand 1949 states and 6460 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:47,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:47,904 INFO L93 Difference]: Finished difference Result 2033 states and 6689 transitions. [2022-03-03 19:09:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:09:47,904 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:47,908 INFO L225 Difference]: With dead ends: 2033 [2022-03-03 19:09:47,908 INFO L226 Difference]: Without dead ends: 2014 [2022-03-03 19:09:47,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:09:47,908 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:47,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 218 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 569 Invalid, 0 Unknown, 312 Unchecked, 0.2s Time] [2022-03-03 19:09:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-03-03 19:09:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1949. [2022-03-03 19:09:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.316221765913758) internal successors, (6460), 1948 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6460 transitions. [2022-03-03 19:09:47,930 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6460 transitions. Word has length 24 [2022-03-03 19:09:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:47,930 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 6460 transitions. [2022-03-03 19:09:47,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6460 transitions. [2022-03-03 19:09:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:47,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:47,933 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:47,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:48,133 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,SelfDestructingSolverStorable321 [2022-03-03 19:09:48,133 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:48,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:48,134 INFO L85 PathProgramCache]: Analyzing trace with hash 923526333, now seen corresponding path program 307 times [2022-03-03 19:09:48,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:48,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331561542] [2022-03-03 19:09:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:48,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:48,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:48,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331561542] [2022-03-03 19:09:48,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331561542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:48,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138621249] [2022-03-03 19:09:48,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:48,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:48,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:48,356 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) [2022-03-03 19:09:48,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-03 19:09:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:48,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:48,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:48,481 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 35 [2022-03-03 19:09:48,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:48,656 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 24 treesize of output 20 [2022-03-03 19:09:48,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:48,658 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 15 treesize of output 7 [2022-03-03 19:09:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:48,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:49,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:49,173 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 100 treesize of output 94 [2022-03-03 19:09:49,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:49,430 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2022-03-03 19:09:49,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:49,435 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 101 treesize of output 85 [2022-03-03 19:09:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:49,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138621249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:49,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:49,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:49,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695812886] [2022-03-03 19:09:49,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:49,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:49,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:49,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:49,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:49,493 INFO L87 Difference]: Start difference. First operand 1949 states and 6460 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:49,861 INFO L93 Difference]: Finished difference Result 2109 states and 6883 transitions. [2022-03-03 19:09:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:09:49,861 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:49,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:49,864 INFO L225 Difference]: With dead ends: 2109 [2022-03-03 19:09:49,864 INFO L226 Difference]: Without dead ends: 2051 [2022-03-03 19:09:49,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:09:49,865 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:49,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 233 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 616 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-03-03 19:09:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2022-03-03 19:09:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1959. [2022-03-03 19:09:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 3.3130745658835545) internal successors, (6487), 1958 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 6487 transitions. [2022-03-03 19:09:49,886 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 6487 transitions. Word has length 24 [2022-03-03 19:09:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:49,886 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 6487 transitions. [2022-03-03 19:09:49,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 6487 transitions. [2022-03-03 19:09:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:49,888 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:49,888 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:49,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:50,088 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,SelfDestructingSolverStorable322 [2022-03-03 19:09:50,089 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:50,089 INFO L85 PathProgramCache]: Analyzing trace with hash -104932065, now seen corresponding path program 308 times [2022-03-03 19:09:50,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:50,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737787142] [2022-03-03 19:09:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:50,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:50,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:50,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737787142] [2022-03-03 19:09:50,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737787142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:50,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208209255] [2022-03-03 19:09:50,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:50,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:50,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:50,278 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) [2022-03-03 19:09:50,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-03 19:09:50,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:50,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:50,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:50,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:50,403 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 35 [2022-03-03 19:09:50,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:50,616 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 24 treesize of output 20 [2022-03-03 19:09:50,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:50,618 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 15 treesize of output 7 [2022-03-03 19:09:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:50,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:51,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:51,151 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 100 treesize of output 94 [2022-03-03 19:09:51,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:51,410 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-03 19:09:51,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:51,415 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-03-03 19:09:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:51,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208209255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:51,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:51,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:51,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039233125] [2022-03-03 19:09:51,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:51,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:51,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:51,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:51,510 INFO L87 Difference]: Start difference. First operand 1959 states and 6487 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:51,820 INFO L93 Difference]: Finished difference Result 2075 states and 6790 transitions. [2022-03-03 19:09:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:09:51,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:51,824 INFO L225 Difference]: With dead ends: 2075 [2022-03-03 19:09:51,824 INFO L226 Difference]: Without dead ends: 2060 [2022-03-03 19:09:51,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:51,824 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:51,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 247 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 711 Invalid, 0 Unknown, 203 Unchecked, 0.3s Time] [2022-03-03 19:09:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-03-03 19:09:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1949. [2022-03-03 19:09:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.316221765913758) internal successors, (6460), 1948 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6460 transitions. [2022-03-03 19:09:51,847 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6460 transitions. Word has length 24 [2022-03-03 19:09:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:51,847 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 6460 transitions. [2022-03-03 19:09:51,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6460 transitions. [2022-03-03 19:09:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:51,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:51,850 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:51,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:52,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-03 19:09:52,050 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:52,050 INFO L85 PathProgramCache]: Analyzing trace with hash -784522235, now seen corresponding path program 309 times [2022-03-03 19:09:52,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:52,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702918496] [2022-03-03 19:09:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:52,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:52,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:52,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702918496] [2022-03-03 19:09:52,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702918496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:52,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026997138] [2022-03-03 19:09:52,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:52,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:52,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:52,218 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) [2022-03-03 19:09:52,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-03 19:09:52,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:09:52,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:52,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:52,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:52,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:52,371 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:09:52,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:52,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:09:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:52,460 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-03 19:09:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:52,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:52,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:52,877 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 108 treesize of output 102 [2022-03-03 19:09:53,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:53,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 52 [2022-03-03 19:09:53,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:53,127 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 43 treesize of output 40 [2022-03-03 19:09:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:53,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026997138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:53,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:53,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:53,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296975417] [2022-03-03 19:09:53,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:53,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:53,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:53,170 INFO L87 Difference]: Start difference. First operand 1949 states and 6460 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:53,634 INFO L93 Difference]: Finished difference Result 2041 states and 6713 transitions. [2022-03-03 19:09:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:09:53,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:53,637 INFO L225 Difference]: With dead ends: 2041 [2022-03-03 19:09:53,637 INFO L226 Difference]: Without dead ends: 2002 [2022-03-03 19:09:53,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:09:53,638 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:53,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 289 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 497 Invalid, 0 Unknown, 423 Unchecked, 0.2s Time] [2022-03-03 19:09:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2022-03-03 19:09:53,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1951. [2022-03-03 19:09:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3153846153846156) internal successors, (6465), 1950 states have internal predecessors, (6465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6465 transitions. [2022-03-03 19:09:53,659 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6465 transitions. Word has length 24 [2022-03-03 19:09:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:53,659 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 6465 transitions. [2022-03-03 19:09:53,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6465 transitions. [2022-03-03 19:09:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:53,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:53,661 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:53,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:53,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:53,862 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:53,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1882947639, now seen corresponding path program 310 times [2022-03-03 19:09:53,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:53,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085388765] [2022-03-03 19:09:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:54,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:54,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085388765] [2022-03-03 19:09:54,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085388765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:54,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833202539] [2022-03-03 19:09:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:54,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:54,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:54,064 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) [2022-03-03 19:09:54,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-03 19:09:54,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:54,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:54,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:54,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:54,241 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 35 treesize of output 29 [2022-03-03 19:09:54,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:54,278 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 42 treesize of output 36 [2022-03-03 19:09:54,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:54,281 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 37 treesize of output 21 [2022-03-03 19:09:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:54,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:54,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:54,740 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-03 19:09:55,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:55,047 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 123 treesize of output 107 [2022-03-03 19:09:55,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:55,052 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 99 treesize of output 83 [2022-03-03 19:09:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:55,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833202539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:55,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:55,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:55,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10730185] [2022-03-03 19:09:55,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:55,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:55,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:55,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:55,145 INFO L87 Difference]: Start difference. First operand 1951 states and 6465 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:55,590 INFO L93 Difference]: Finished difference Result 2065 states and 6775 transitions. [2022-03-03 19:09:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:09:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:55,593 INFO L225 Difference]: With dead ends: 2065 [2022-03-03 19:09:55,593 INFO L226 Difference]: Without dead ends: 2030 [2022-03-03 19:09:55,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:09:55,593 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:55,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 202 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 545 Invalid, 0 Unknown, 141 Unchecked, 0.2s Time] [2022-03-03 19:09:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-03-03 19:09:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1949. [2022-03-03 19:09:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.316221765913758) internal successors, (6460), 1948 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6460 transitions. [2022-03-03 19:09:55,615 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6460 transitions. Word has length 24 [2022-03-03 19:09:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:55,615 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 6460 transitions. [2022-03-03 19:09:55,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:55,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6460 transitions. [2022-03-03 19:09:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:55,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:55,618 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:55,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:55,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:55,818 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1655808971, now seen corresponding path program 311 times [2022-03-03 19:09:55,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:55,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786165532] [2022-03-03 19:09:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:55,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:56,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:56,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786165532] [2022-03-03 19:09:56,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786165532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:56,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928366079] [2022-03-03 19:09:56,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:56,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:56,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:56,042 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) [2022-03-03 19:09:56,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-03 19:09:56,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:09:56,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:56,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:56,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:56,111 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 35 [2022-03-03 19:09:56,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:56,202 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 43 treesize of output 37 [2022-03-03 19:09:56,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:56,204 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:09:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:56,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:56,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:56,910 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-03-03 19:09:56,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:56,972 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2022-03-03 19:09:56,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:56,977 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-03-03 19:09:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:57,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928366079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:57,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:57,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:57,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645518249] [2022-03-03 19:09:57,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:57,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:57,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:57,052 INFO L87 Difference]: Start difference. First operand 1949 states and 6460 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:57,933 INFO L93 Difference]: Finished difference Result 2193 states and 7096 transitions. [2022-03-03 19:09:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:09:57,933 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:09:57,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:57,937 INFO L225 Difference]: With dead ends: 2193 [2022-03-03 19:09:57,937 INFO L226 Difference]: Without dead ends: 2073 [2022-03-03 19:09:57,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:09:57,937 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:57,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 290 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 843 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-03-03 19:09:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2022-03-03 19:09:57,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1953. [2022-03-03 19:09:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.3160860655737703) internal successors, (6473), 1952 states have internal predecessors, (6473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 6473 transitions. [2022-03-03 19:09:57,959 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 6473 transitions. Word has length 24 [2022-03-03 19:09:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:57,959 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 6473 transitions. [2022-03-03 19:09:57,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 6473 transitions. [2022-03-03 19:09:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:09:57,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:57,962 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:09:57,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:58,162 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,SelfDestructingSolverStorable326 [2022-03-03 19:09:58,162 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:58,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1540288257, now seen corresponding path program 312 times [2022-03-03 19:09:58,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:58,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401576881] [2022-03-03 19:09:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:58,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:58,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:58,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401576881] [2022-03-03 19:09:58,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401576881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:58,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425709747] [2022-03-03 19:09:58,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:58,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:58,382 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) [2022-03-03 19:09:58,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-03 19:09:58,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:09:58,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:58,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:09:58,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:58,451 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 35 [2022-03-03 19:09:58,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:58,567 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 24 treesize of output 20 [2022-03-03 19:09:58,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:58,570 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 15 treesize of output 7 [2022-03-03 19:09:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:58,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:59,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:59,221 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-03-03 19:09:59,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:59,293 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 51 treesize of output 50 [2022-03-03 19:09:59,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:59,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-03-03 19:09:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:09:59,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425709747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:59,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:59,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:09:59,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909093308] [2022-03-03 19:09:59,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:59,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:09:59,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:59,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:09:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:09:59,359 INFO L87 Difference]: Start difference. First operand 1953 states and 6473 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:00,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:00,096 INFO L93 Difference]: Finished difference Result 2190 states and 7135 transitions. [2022-03-03 19:10:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:00,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:00,099 INFO L225 Difference]: With dead ends: 2190 [2022-03-03 19:10:00,099 INFO L226 Difference]: Without dead ends: 2105 [2022-03-03 19:10:00,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:10:00,100 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:00,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 214 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 624 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-03-03 19:10:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2022-03-03 19:10:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1967. [2022-03-03 19:10:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.317904374364191) internal successors, (6523), 1966 states have internal predecessors, (6523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6523 transitions. [2022-03-03 19:10:00,122 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6523 transitions. Word has length 24 [2022-03-03 19:10:00,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:00,122 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 6523 transitions. [2022-03-03 19:10:00,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6523 transitions. [2022-03-03 19:10:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:00,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:00,124 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:00,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:00,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:00,325 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:00,325 INFO L85 PathProgramCache]: Analyzing trace with hash -8275917, now seen corresponding path program 313 times [2022-03-03 19:10:00,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:00,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917396915] [2022-03-03 19:10:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:00,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:00,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:00,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917396915] [2022-03-03 19:10:00,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917396915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:00,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325117594] [2022-03-03 19:10:00,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:00,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:00,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:00,546 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) [2022-03-03 19:10:00,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-03 19:10:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:00,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:00,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:00,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:00,639 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:10:01,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:01,102 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 35 treesize of output 29 [2022-03-03 19:10:01,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:01,104 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 12 treesize of output 3 [2022-03-03 19:10:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:01,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:01,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:01,826 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-03 19:10:01,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:01,933 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 123 treesize of output 107 [2022-03-03 19:10:01,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:01,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 83 [2022-03-03 19:10:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:01,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325117594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:01,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:01,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:01,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810229618] [2022-03-03 19:10:01,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:01,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:01,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:01,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:01,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:01,991 INFO L87 Difference]: Start difference. First operand 1967 states and 6523 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:02,221 INFO L93 Difference]: Finished difference Result 2098 states and 6904 transitions. [2022-03-03 19:10:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:10:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:02,224 INFO L225 Difference]: With dead ends: 2098 [2022-03-03 19:10:02,224 INFO L226 Difference]: Without dead ends: 2067 [2022-03-03 19:10:02,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:02,225 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:02,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 234 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 507 Invalid, 0 Unknown, 263 Unchecked, 0.2s Time] [2022-03-03 19:10:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-03-03 19:10:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1969. [2022-03-03 19:10:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3185975609756095) internal successors, (6531), 1968 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6531 transitions. [2022-03-03 19:10:02,246 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6531 transitions. Word has length 24 [2022-03-03 19:10:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:02,246 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 6531 transitions. [2022-03-03 19:10:02,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6531 transitions. [2022-03-03 19:10:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:02,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:02,249 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:02,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-03-03 19:10:02,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:02,449 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash -492678687, now seen corresponding path program 314 times [2022-03-03 19:10:02,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:02,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844802983] [2022-03-03 19:10:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:02,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:02,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:02,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844802983] [2022-03-03 19:10:02,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844802983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:02,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918338407] [2022-03-03 19:10:02,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:02,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:02,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:02,646 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) [2022-03-03 19:10:02,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-03 19:10:02,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:02,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:02,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:02,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:02,731 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 35 [2022-03-03 19:10:02,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:02,936 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 43 treesize of output 37 [2022-03-03 19:10:02,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:02,938 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 37 treesize of output 21 [2022-03-03 19:10:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:03,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:03,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:03,558 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-03 19:10:03,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:03,683 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 126 treesize of output 110 [2022-03-03 19:10:03,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:03,688 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 102 treesize of output 86 [2022-03-03 19:10:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:03,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918338407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:03,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:03,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:03,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406181733] [2022-03-03 19:10:03,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:03,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:03,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:03,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:03,745 INFO L87 Difference]: Start difference. First operand 1969 states and 6531 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:04,110 INFO L93 Difference]: Finished difference Result 2128 states and 6956 transitions. [2022-03-03 19:10:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:10:04,111 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:04,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:04,114 INFO L225 Difference]: With dead ends: 2128 [2022-03-03 19:10:04,114 INFO L226 Difference]: Without dead ends: 2093 [2022-03-03 19:10:04,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:10:04,114 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:04,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 233 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 662 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2022-03-03 19:10:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2022-03-03 19:10:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1969. [2022-03-03 19:10:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3185975609756095) internal successors, (6531), 1968 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6531 transitions. [2022-03-03 19:10:04,136 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6531 transitions. Word has length 24 [2022-03-03 19:10:04,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:04,136 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 6531 transitions. [2022-03-03 19:10:04,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6531 transitions. [2022-03-03 19:10:04,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:04,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:04,139 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:04,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:04,339 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,SelfDestructingSolverStorable329 [2022-03-03 19:10:04,339 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash 196331499, now seen corresponding path program 315 times [2022-03-03 19:10:04,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:04,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441463583] [2022-03-03 19:10:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:04,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:04,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:04,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441463583] [2022-03-03 19:10:04,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441463583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:04,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305488916] [2022-03-03 19:10:04,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:04,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:04,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:04,516 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) [2022-03-03 19:10:04,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-03 19:10:04,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:10:04,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:04,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:04,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:04,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:04,627 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 [2022-03-03 19:10:05,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:05,042 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 24 treesize of output 20 [2022-03-03 19:10:05,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:05,044 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:10:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:05,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:05,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:05,615 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 87 treesize of output 81 [2022-03-03 19:10:05,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:05,731 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 123 treesize of output 107 [2022-03-03 19:10:05,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:05,737 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-03 19:10:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:05,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305488916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:05,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:05,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:05,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95662830] [2022-03-03 19:10:05,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:05,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:05,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:05,805 INFO L87 Difference]: Start difference. First operand 1969 states and 6531 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:06,070 INFO L93 Difference]: Finished difference Result 2156 states and 7026 transitions. [2022-03-03 19:10:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:06,074 INFO L225 Difference]: With dead ends: 2156 [2022-03-03 19:10:06,074 INFO L226 Difference]: Without dead ends: 2083 [2022-03-03 19:10:06,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:06,074 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:06,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 233 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 619 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-03-03 19:10:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-03-03 19:10:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1969. [2022-03-03 19:10:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3185975609756095) internal successors, (6531), 1968 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:06,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6531 transitions. [2022-03-03 19:10:06,096 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6531 transitions. Word has length 24 [2022-03-03 19:10:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:06,097 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 6531 transitions. [2022-03-03 19:10:06,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6531 transitions. [2022-03-03 19:10:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:06,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:06,099 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:06,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-03-03 19:10:06,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:06,299 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:06,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:06,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1378283027, now seen corresponding path program 316 times [2022-03-03 19:10:06,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:06,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560088250] [2022-03-03 19:10:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:06,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:06,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:06,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560088250] [2022-03-03 19:10:06,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560088250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:06,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556993781] [2022-03-03 19:10:06,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:06,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:06,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:06,525 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) [2022-03-03 19:10:06,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-03 19:10:06,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:06,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:06,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:06,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:06,615 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 35 [2022-03-03 19:10:06,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:06,745 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 24 treesize of output 20 [2022-03-03 19:10:06,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:06,747 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 12 treesize of output 3 [2022-03-03 19:10:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:06,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:07,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:07,555 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 87 treesize of output 81 [2022-03-03 19:10:07,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:07,661 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 123 treesize of output 107 [2022-03-03 19:10:07,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:07,667 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 99 treesize of output 83 [2022-03-03 19:10:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:07,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556993781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:07,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:07,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:07,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415453290] [2022-03-03 19:10:07,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:07,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:07,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:07,742 INFO L87 Difference]: Start difference. First operand 1969 states and 6531 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:08,618 INFO L93 Difference]: Finished difference Result 2527 states and 8045 transitions. [2022-03-03 19:10:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:10:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:08,622 INFO L225 Difference]: With dead ends: 2527 [2022-03-03 19:10:08,622 INFO L226 Difference]: Without dead ends: 2396 [2022-03-03 19:10:08,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:10:08,622 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 194 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:08,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 239 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 589 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-03-03 19:10:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2022-03-03 19:10:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1982. [2022-03-03 19:10:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.3220595658758203) internal successors, (6581), 1981 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 6581 transitions. [2022-03-03 19:10:08,649 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 6581 transitions. Word has length 24 [2022-03-03 19:10:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:08,649 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 6581 transitions. [2022-03-03 19:10:08,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 6581 transitions. [2022-03-03 19:10:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:08,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:08,651 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:08,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:08,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:08,852 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:08,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2067293213, now seen corresponding path program 317 times [2022-03-03 19:10:08,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:08,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760556892] [2022-03-03 19:10:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:08,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:09,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:09,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760556892] [2022-03-03 19:10:09,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760556892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:09,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027839562] [2022-03-03 19:10:09,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:09,062 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) [2022-03-03 19:10:09,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-03 19:10:09,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 19:10:09,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:09,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:09,151 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 35 [2022-03-03 19:10:09,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:09,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:10:09,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:09,300 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 15 treesize of output 7 [2022-03-03 19:10:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:09,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:10,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:10,115 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 87 treesize of output 81 [2022-03-03 19:10:10,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:10,223 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-03 19:10:10,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:10,229 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 99 treesize of output 83 [2022-03-03 19:10:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:10,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027839562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:10,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:10,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:10,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672692720] [2022-03-03 19:10:10,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:10,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:10,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:10,321 INFO L87 Difference]: Start difference. First operand 1982 states and 6581 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:10,656 INFO L93 Difference]: Finished difference Result 2441 states and 7919 transitions. [2022-03-03 19:10:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:10:10,656 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:10,660 INFO L225 Difference]: With dead ends: 2441 [2022-03-03 19:10:10,661 INFO L226 Difference]: Without dead ends: 2377 [2022-03-03 19:10:10,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:10:10,661 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:10,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 316 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 571 Invalid, 0 Unknown, 233 Unchecked, 0.2s Time] [2022-03-03 19:10:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-03-03 19:10:10,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2062. [2022-03-03 19:10:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.3134400776322175) internal successors, (6829), 2061 states have internal predecessors, (6829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6829 transitions. [2022-03-03 19:10:10,687 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6829 transitions. Word has length 24 [2022-03-03 19:10:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:10,687 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 6829 transitions. [2022-03-03 19:10:10,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6829 transitions. [2022-03-03 19:10:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:10,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:10,690 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:10,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:10,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:10,890 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:10,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash -928259871, now seen corresponding path program 318 times [2022-03-03 19:10:10,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:10,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628325120] [2022-03-03 19:10:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:10,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:10:11,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:11,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628325120] [2022-03-03 19:10:11,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628325120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:11,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841756951] [2022-03-03 19:10:11,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:11,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:11,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:11,087 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) [2022-03-03 19:10:11,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-03 19:10:11,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:10:11,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:11,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:11,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:11,162 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 41 treesize of output 35 [2022-03-03 19:10:11,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:11,332 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 24 treesize of output 20 [2022-03-03 19:10:11,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:11,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:10:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:10:11,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:12,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:12,001 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 51 treesize of output 51 [2022-03-03 19:10:12,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:12,062 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 51 treesize of output 50 [2022-03-03 19:10:12,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:12,067 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 41 treesize of output 40 [2022-03-03 19:10:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:10:12,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841756951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:12,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:12,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:10:12,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240113364] [2022-03-03 19:10:12,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:12,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:10:12,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:10:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:10:12,109 INFO L87 Difference]: Start difference. First operand 2062 states and 6829 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-03-03 19:10:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:15,048 INFO L93 Difference]: Finished difference Result 3216 states and 10328 transitions. [2022-03-03 19:10:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:10:15,048 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) Word has length 24 [2022-03-03 19:10:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:15,054 INFO L225 Difference]: With dead ends: 3216 [2022-03-03 19:10:15,054 INFO L226 Difference]: Without dead ends: 3027 [2022-03-03 19:10:15,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 19:10:15,054 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 191 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 477 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:15,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 555 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1002 Invalid, 0 Unknown, 477 Unchecked, 0.5s Time] [2022-03-03 19:10:15,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2022-03-03 19:10:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 2192. [2022-03-03 19:10:15,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 3.3308991328160658) internal successors, (7298), 2191 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 7298 transitions. [2022-03-03 19:10:15,094 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 7298 transitions. Word has length 24 [2022-03-03 19:10:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:15,094 INFO L470 AbstractCegarLoop]: Abstraction has 2192 states and 7298 transitions. [2022-03-03 19:10:15,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-03-03 19:10:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 7298 transitions. [2022-03-03 19:10:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:15,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:15,097 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:15,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:15,297 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,SelfDestructingSolverStorable333 [2022-03-03 19:10:15,297 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash 667409697, now seen corresponding path program 319 times [2022-03-03 19:10:15,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:15,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538825661] [2022-03-03 19:10:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:15,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:15,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538825661] [2022-03-03 19:10:15,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538825661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:15,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238740842] [2022-03-03 19:10:15,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:15,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:15,509 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) [2022-03-03 19:10:15,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-03 19:10:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:15,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:15,596 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 35 [2022-03-03 19:10:15,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:15,741 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 24 treesize of output 20 [2022-03-03 19:10:15,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:15,744 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 15 treesize of output 7 [2022-03-03 19:10:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:15,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:16,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:16,591 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-03 19:10:16,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:16,700 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 123 treesize of output 107 [2022-03-03 19:10:16,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:16,706 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 99 treesize of output 83 [2022-03-03 19:10:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:16,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238740842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:16,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:16,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:16,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103926925] [2022-03-03 19:10:16,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:16,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:16,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:16,778 INFO L87 Difference]: Start difference. First operand 2192 states and 7298 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:17,570 INFO L93 Difference]: Finished difference Result 2781 states and 8972 transitions. [2022-03-03 19:10:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:10:17,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:17,575 INFO L225 Difference]: With dead ends: 2781 [2022-03-03 19:10:17,575 INFO L226 Difference]: Without dead ends: 2712 [2022-03-03 19:10:17,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:10:17,575 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 156 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:17,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 333 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 830 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-03-03 19:10:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2022-03-03 19:10:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2184. [2022-03-03 19:10:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 3.3234081539166285) internal successors, (7255), 2183 states have internal predecessors, (7255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 7255 transitions. [2022-03-03 19:10:17,604 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 7255 transitions. Word has length 24 [2022-03-03 19:10:17,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:17,604 INFO L470 AbstractCegarLoop]: Abstraction has 2184 states and 7255 transitions. [2022-03-03 19:10:17,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 7255 transitions. [2022-03-03 19:10:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:17,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:17,607 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:17,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:17,807 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,SelfDestructingSolverStorable334 [2022-03-03 19:10:17,807 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:17,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:17,808 INFO L85 PathProgramCache]: Analyzing trace with hash -439156239, now seen corresponding path program 320 times [2022-03-03 19:10:17,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:17,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666160301] [2022-03-03 19:10:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:17,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:18,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:18,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666160301] [2022-03-03 19:10:18,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666160301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:18,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858983558] [2022-03-03 19:10:18,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:18,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:18,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:18,008 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) [2022-03-03 19:10:18,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-03 19:10:18,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:18,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:18,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:18,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:18,092 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 41 treesize of output 35 [2022-03-03 19:10:18,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:18,287 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 24 treesize of output 20 [2022-03-03 19:10:18,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:18,289 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 12 treesize of output 3 [2022-03-03 19:10:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:18,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:19,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:19,097 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 87 treesize of output 81 [2022-03-03 19:10:19,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:19,202 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-03 19:10:19,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:19,208 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 99 treesize of output 83 [2022-03-03 19:10:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:19,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858983558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:19,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:19,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:19,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727879115] [2022-03-03 19:10:19,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:19,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:19,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:19,275 INFO L87 Difference]: Start difference. First operand 2184 states and 7255 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:19,564 INFO L93 Difference]: Finished difference Result 2562 states and 8334 transitions. [2022-03-03 19:10:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:10:19,565 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:19,577 INFO L225 Difference]: With dead ends: 2562 [2022-03-03 19:10:19,578 INFO L226 Difference]: Without dead ends: 2518 [2022-03-03 19:10:19,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:10:19,578 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:19,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 270 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 455 Invalid, 0 Unknown, 369 Unchecked, 0.2s Time] [2022-03-03 19:10:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-03-03 19:10:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2161. [2022-03-03 19:10:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 3.3337962962962964) internal successors, (7201), 2160 states have internal predecessors, (7201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 7201 transitions. [2022-03-03 19:10:19,604 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 7201 transitions. Word has length 24 [2022-03-03 19:10:19,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:19,604 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 7201 transitions. [2022-03-03 19:10:19,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 7201 transitions. [2022-03-03 19:10:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:19,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:19,607 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:19,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:19,807 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,SelfDestructingSolverStorable335 [2022-03-03 19:10:19,807 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash 937475181, now seen corresponding path program 321 times [2022-03-03 19:10:19,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:19,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689307057] [2022-03-03 19:10:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:19,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:20,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:20,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689307057] [2022-03-03 19:10:20,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689307057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:20,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946328885] [2022-03-03 19:10:20,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:20,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:20,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:20,026 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) [2022-03-03 19:10:20,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-03 19:10:20,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:10:20,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:20,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:20,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:20,094 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 35 [2022-03-03 19:10:20,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:20,224 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 24 treesize of output 20 [2022-03-03 19:10:20,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:20,226 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 12 treesize of output 3 [2022-03-03 19:10:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:20,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:20,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:20,923 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 50 treesize of output 50 [2022-03-03 19:10:20,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:20,996 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 50 treesize of output 49 [2022-03-03 19:10:21,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:21,001 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 40 treesize of output 39 [2022-03-03 19:10:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:21,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946328885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:21,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:21,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:21,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675811444] [2022-03-03 19:10:21,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:21,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:21,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:21,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:21,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:21,062 INFO L87 Difference]: Start difference. First operand 2161 states and 7201 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:21,465 INFO L93 Difference]: Finished difference Result 2517 states and 8215 transitions. [2022-03-03 19:10:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:10:21,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:21,470 INFO L225 Difference]: With dead ends: 2517 [2022-03-03 19:10:21,470 INFO L226 Difference]: Without dead ends: 2510 [2022-03-03 19:10:21,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:10:21,471 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:21,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 296 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 533 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2022-03-03 19:10:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2022-03-03 19:10:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2167. [2022-03-03 19:10:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.337026777469991) internal successors, (7228), 2166 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7228 transitions. [2022-03-03 19:10:21,498 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7228 transitions. Word has length 24 [2022-03-03 19:10:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:21,498 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 7228 transitions. [2022-03-03 19:10:21,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7228 transitions. [2022-03-03 19:10:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:21,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:21,501 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:21,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:21,701 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,SelfDestructingSolverStorable336 [2022-03-03 19:10:21,701 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:21,701 INFO L85 PathProgramCache]: Analyzing trace with hash -978702409, now seen corresponding path program 322 times [2022-03-03 19:10:21,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:21,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374902410] [2022-03-03 19:10:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:21,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:21,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:21,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374902410] [2022-03-03 19:10:21,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374902410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:21,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637528114] [2022-03-03 19:10:21,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:21,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:21,918 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) [2022-03-03 19:10:21,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-03 19:10:21,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:21,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:21,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:21,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:22,017 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 35 [2022-03-03 19:10:22,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:22,216 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 24 treesize of output 20 [2022-03-03 19:10:22,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:22,218 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 15 treesize of output 7 [2022-03-03 19:10:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:22,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:22,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:22,977 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-03 19:10:23,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:23,103 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 126 treesize of output 110 [2022-03-03 19:10:23,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:23,108 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-03 19:10:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:23,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637528114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:23,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:23,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:23,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554301287] [2022-03-03 19:10:23,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:23,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:23,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:23,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:23,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:23,170 INFO L87 Difference]: Start difference. First operand 2167 states and 7228 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:23,437 INFO L93 Difference]: Finished difference Result 2645 states and 8622 transitions. [2022-03-03 19:10:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:10:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:23,441 INFO L225 Difference]: With dead ends: 2645 [2022-03-03 19:10:23,441 INFO L226 Difference]: Without dead ends: 2583 [2022-03-03 19:10:23,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:10:23,441 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 88 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 595 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:23,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 290 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 488 Invalid, 0 Unknown, 595 Unchecked, 0.2s Time] [2022-03-03 19:10:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2022-03-03 19:10:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2105. [2022-03-03 19:10:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2105 states, 2104 states have (on average 3.3407794676806084) internal successors, (7029), 2104 states have internal predecessors, (7029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 7029 transitions. [2022-03-03 19:10:23,468 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 7029 transitions. Word has length 24 [2022-03-03 19:10:23,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:23,468 INFO L470 AbstractCegarLoop]: Abstraction has 2105 states and 7029 transitions. [2022-03-03 19:10:23,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:23,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 7029 transitions. [2022-03-03 19:10:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:23,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:23,471 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:23,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:23,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:23,671 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash -170281147, now seen corresponding path program 323 times [2022-03-03 19:10:23,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:23,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369597992] [2022-03-03 19:10:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:23,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:23,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:23,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369597992] [2022-03-03 19:10:23,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369597992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:23,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748963183] [2022-03-03 19:10:23,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:23,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:23,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:23,857 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) [2022-03-03 19:10:23,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-03 19:10:23,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:10:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:23,926 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 35 [2022-03-03 19:10:24,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:24,120 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 21 treesize of output 17 [2022-03-03 19:10:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:24,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-03 19:10:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:24,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:24,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:24,690 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 56 treesize of output 54 [2022-03-03 19:10:24,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:24,757 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 54 treesize of output 51 [2022-03-03 19:10:24,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:24,761 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 42 treesize of output 39 [2022-03-03 19:10:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:24,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748963183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:24,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:24,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:24,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243629345] [2022-03-03 19:10:24,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:24,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:24,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:24,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:24,802 INFO L87 Difference]: Start difference. First operand 2105 states and 7029 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:25,821 INFO L93 Difference]: Finished difference Result 2842 states and 9063 transitions. [2022-03-03 19:10:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:10:25,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:25,825 INFO L225 Difference]: With dead ends: 2842 [2022-03-03 19:10:25,826 INFO L226 Difference]: Without dead ends: 2757 [2022-03-03 19:10:25,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=212, Invalid=1510, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:10:25,826 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 169 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:25,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 350 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 729 Invalid, 0 Unknown, 215 Unchecked, 0.3s Time] [2022-03-03 19:10:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2022-03-03 19:10:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2116. [2022-03-03 19:10:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 3.34468085106383) internal successors, (7074), 2115 states have internal predecessors, (7074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7074 transitions. [2022-03-03 19:10:25,855 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7074 transitions. Word has length 24 [2022-03-03 19:10:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:25,855 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 7074 transitions. [2022-03-03 19:10:25,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7074 transitions. [2022-03-03 19:10:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:25,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:25,858 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:25,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-03-03 19:10:26,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:26,059 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash -845663075, now seen corresponding path program 324 times [2022-03-03 19:10:26,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:26,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871044622] [2022-03-03 19:10:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:26,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:26,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:26,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871044622] [2022-03-03 19:10:26,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871044622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:26,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533078266] [2022-03-03 19:10:26,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:26,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:26,242 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) [2022-03-03 19:10:26,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-03 19:10:26,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:10:26,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:26,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:10:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:26,327 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 35 [2022-03-03 19:10:26,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:26,632 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 29 treesize of output 23 [2022-03-03 19:10:26,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:26,634 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 25 treesize of output 12 [2022-03-03 19:10:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:26,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:27,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:27,265 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 53 treesize of output 51 [2022-03-03 19:10:27,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:27,337 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 81 treesize of output 73 [2022-03-03 19:10:27,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:27,342 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-03-03 19:10:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:27,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533078266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:27,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:27,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:27,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902390174] [2022-03-03 19:10:27,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:27,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:27,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:27,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:27,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:27,410 INFO L87 Difference]: Start difference. First operand 2116 states and 7074 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:27,778 INFO L93 Difference]: Finished difference Result 2744 states and 8806 transitions. [2022-03-03 19:10:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:10:27,779 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:27,783 INFO L225 Difference]: With dead ends: 2744 [2022-03-03 19:10:27,783 INFO L226 Difference]: Without dead ends: 2688 [2022-03-03 19:10:27,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:10:27,784 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 135 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:27,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 251 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 518 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-03-03 19:10:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2022-03-03 19:10:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2161. [2022-03-03 19:10:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 3.3449074074074074) internal successors, (7225), 2160 states have internal predecessors, (7225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 7225 transitions. [2022-03-03 19:10:27,823 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 7225 transitions. Word has length 24 [2022-03-03 19:10:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:27,823 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 7225 transitions. [2022-03-03 19:10:27,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 7225 transitions. [2022-03-03 19:10:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:27,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:27,826 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:27,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-03-03 19:10:28,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:28,027 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:28,027 INFO L85 PathProgramCache]: Analyzing trace with hash 362322879, now seen corresponding path program 325 times [2022-03-03 19:10:28,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:28,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884844509] [2022-03-03 19:10:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:28,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:28,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:28,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884844509] [2022-03-03 19:10:28,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884844509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:28,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668753259] [2022-03-03 19:10:28,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:28,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:28,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:28,239 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) [2022-03-03 19:10:28,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-03 19:10:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:28,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:28,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:28,327 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 35 [2022-03-03 19:10:28,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:28,581 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-03 19:10:28,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:28,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 8 [2022-03-03 19:10:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:28,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:29,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:29,265 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 87 treesize of output 81 [2022-03-03 19:10:29,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:29,419 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 125 treesize of output 109 [2022-03-03 19:10:29,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:29,424 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 101 treesize of output 85 [2022-03-03 19:10:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:29,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668753259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:29,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:29,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:29,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335411081] [2022-03-03 19:10:29,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:29,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:29,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:29,520 INFO L87 Difference]: Start difference. First operand 2161 states and 7225 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:29,856 INFO L93 Difference]: Finished difference Result 2494 states and 8119 transitions. [2022-03-03 19:10:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:29,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:29,861 INFO L225 Difference]: With dead ends: 2494 [2022-03-03 19:10:29,861 INFO L226 Difference]: Without dead ends: 2480 [2022-03-03 19:10:29,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:10:29,861 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 97 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:29,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 373 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 606 Invalid, 0 Unknown, 220 Unchecked, 0.2s Time] [2022-03-03 19:10:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2022-03-03 19:10:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2165. [2022-03-03 19:10:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 3.343345656192237) internal successors, (7235), 2164 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 7235 transitions. [2022-03-03 19:10:29,887 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 7235 transitions. Word has length 24 [2022-03-03 19:10:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:29,887 INFO L470 AbstractCegarLoop]: Abstraction has 2165 states and 7235 transitions. [2022-03-03 19:10:29,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 7235 transitions. [2022-03-03 19:10:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:29,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:29,890 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:29,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:30,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:30,090 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:30,091 INFO L85 PathProgramCache]: Analyzing trace with hash -313059049, now seen corresponding path program 326 times [2022-03-03 19:10:30,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:30,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149057244] [2022-03-03 19:10:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:30,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:30,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:30,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149057244] [2022-03-03 19:10:30,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149057244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:30,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48805896] [2022-03-03 19:10:30,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:30,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:30,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:30,293 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) [2022-03-03 19:10:30,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-03-03 19:10:30,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:30,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:30,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:30,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:30,378 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 35 [2022-03-03 19:10:30,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:30,656 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 35 treesize of output 29 [2022-03-03 19:10:30,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:30,658 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 12 treesize of output 3 [2022-03-03 19:10:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:30,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:31,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:31,349 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 87 treesize of output 81 [2022-03-03 19:10:31,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:31,499 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-03 19:10:31,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:31,504 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 103 treesize of output 87 [2022-03-03 19:10:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:31,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48805896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:31,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:31,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:31,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240376117] [2022-03-03 19:10:31,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:31,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:31,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:31,564 INFO L87 Difference]: Start difference. First operand 2165 states and 7235 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:31,855 INFO L93 Difference]: Finished difference Result 2602 states and 8503 transitions. [2022-03-03 19:10:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:10:31,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:31,860 INFO L225 Difference]: With dead ends: 2602 [2022-03-03 19:10:31,860 INFO L226 Difference]: Without dead ends: 2571 [2022-03-03 19:10:31,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:10:31,860 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:31,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 316 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 519 Invalid, 0 Unknown, 659 Unchecked, 0.2s Time] [2022-03-03 19:10:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2022-03-03 19:10:31,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2121. [2022-03-03 19:10:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 3.345754716981132) internal successors, (7093), 2120 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 7093 transitions. [2022-03-03 19:10:31,887 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 7093 transitions. Word has length 24 [2022-03-03 19:10:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:31,887 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 7093 transitions. [2022-03-03 19:10:31,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 7093 transitions. [2022-03-03 19:10:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:31,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:31,889 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:31,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-03-03 19:10:32,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:32,090 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:32,090 INFO L85 PathProgramCache]: Analyzing trace with hash -813016629, now seen corresponding path program 327 times [2022-03-03 19:10:32,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:32,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995758721] [2022-03-03 19:10:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:32,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:32,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:32,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995758721] [2022-03-03 19:10:32,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995758721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:32,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397466895] [2022-03-03 19:10:32,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:32,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:32,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:32,262 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) [2022-03-03 19:10:32,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-03-03 19:10:32,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:10:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:10:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:32,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:32,356 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 41 treesize of output 35 [2022-03-03 19:10:32,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:32,568 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 29 treesize of output 23 [2022-03-03 19:10:32,570 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 [2022-03-03 19:10:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:32,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:33,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:33,082 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 53 treesize of output 51 [2022-03-03 19:10:33,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:33,155 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 81 treesize of output 73 [2022-03-03 19:10:33,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:33,160 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 65 treesize of output 57 [2022-03-03 19:10:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:33,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397466895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:33,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:33,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:33,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122653478] [2022-03-03 19:10:33,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:33,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:33,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:33,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:33,207 INFO L87 Difference]: Start difference. First operand 2121 states and 7093 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:33,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:33,632 INFO L93 Difference]: Finished difference Result 3296 states and 10391 transitions. [2022-03-03 19:10:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:10:33,632 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:33,638 INFO L225 Difference]: With dead ends: 3296 [2022-03-03 19:10:33,638 INFO L226 Difference]: Without dead ends: 3275 [2022-03-03 19:10:33,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:10:33,638 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:33,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 346 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 508 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2022-03-03 19:10:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2022-03-03 19:10:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 2173. [2022-03-03 19:10:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.324585635359116) internal successors, (7221), 2172 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7221 transitions. [2022-03-03 19:10:33,672 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7221 transitions. Word has length 24 [2022-03-03 19:10:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:33,672 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 7221 transitions. [2022-03-03 19:10:33,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7221 transitions. [2022-03-03 19:10:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:33,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:33,674 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:33,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:33,875 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,SelfDestructingSolverStorable342 [2022-03-03 19:10:33,875 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:33,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1937585227, now seen corresponding path program 328 times [2022-03-03 19:10:33,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:33,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910170817] [2022-03-03 19:10:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:33,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:34,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:34,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910170817] [2022-03-03 19:10:34,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910170817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:34,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303432029] [2022-03-03 19:10:34,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:34,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:34,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:34,044 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) [2022-03-03 19:10:34,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-03-03 19:10:34,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:34,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:34,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:34,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:34,130 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:10:34,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:34,341 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:10:34,343 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 [2022-03-03 19:10:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:34,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:34,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:34,968 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 87 treesize of output 81 [2022-03-03 19:10:35,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:35,074 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 123 treesize of output 107 [2022-03-03 19:10:35,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:35,079 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 99 treesize of output 83 [2022-03-03 19:10:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:35,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303432029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:35,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:35,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:35,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570007037] [2022-03-03 19:10:35,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:35,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:35,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:35,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:35,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:35,146 INFO L87 Difference]: Start difference. First operand 2173 states and 7221 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:35,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:35,415 INFO L93 Difference]: Finished difference Result 2715 states and 8829 transitions. [2022-03-03 19:10:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:35,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:35,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:35,420 INFO L225 Difference]: With dead ends: 2715 [2022-03-03 19:10:35,420 INFO L226 Difference]: Without dead ends: 2712 [2022-03-03 19:10:35,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:10:35,420 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:35,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 278 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 397 Invalid, 0 Unknown, 225 Unchecked, 0.2s Time] [2022-03-03 19:10:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2022-03-03 19:10:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2175. [2022-03-03 19:10:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.3233670653173872) internal successors, (7225), 2174 states have internal predecessors, (7225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7225 transitions. [2022-03-03 19:10:35,450 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7225 transitions. Word has length 24 [2022-03-03 19:10:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:35,450 INFO L470 AbstractCegarLoop]: Abstraction has 2175 states and 7225 transitions. [2022-03-03 19:10:35,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7225 transitions. [2022-03-03 19:10:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:35,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:35,453 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:35,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-03-03 19:10:35,653 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,SelfDestructingSolverStorable343 [2022-03-03 19:10:35,653 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:35,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1488398557, now seen corresponding path program 329 times [2022-03-03 19:10:35,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:35,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593999561] [2022-03-03 19:10:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:35,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:35,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:35,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593999561] [2022-03-03 19:10:35,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593999561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:35,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695157774] [2022-03-03 19:10:35,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:35,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:35,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:35,829 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) [2022-03-03 19:10:35,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-03-03 19:10:35,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:10:35,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:35,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:35,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:35,898 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:10:36,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:36,057 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 21 treesize of output 17 [2022-03-03 19:10:36,058 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 11 treesize of output 7 [2022-03-03 19:10:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:36,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:36,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:36,546 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-03 19:10:36,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:36,608 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2022-03-03 19:10:36,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:36,613 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-03 19:10:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:36,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695157774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:36,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:36,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:36,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210212836] [2022-03-03 19:10:36,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:36,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:36,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:36,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:36,647 INFO L87 Difference]: Start difference. First operand 2175 states and 7225 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:36,975 INFO L93 Difference]: Finished difference Result 2633 states and 8496 transitions. [2022-03-03 19:10:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:10:36,975 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:36,979 INFO L225 Difference]: With dead ends: 2633 [2022-03-03 19:10:36,979 INFO L226 Difference]: Without dead ends: 2602 [2022-03-03 19:10:36,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:10:36,979 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 79 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:36,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 314 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 349 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-03-03 19:10:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2022-03-03 19:10:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2224. [2022-03-03 19:10:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 3.307242465137202) internal successors, (7352), 2223 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 7352 transitions. [2022-03-03 19:10:37,006 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 7352 transitions. Word has length 24 [2022-03-03 19:10:37,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:37,006 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 7352 transitions. [2022-03-03 19:10:37,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:37,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 7352 transitions. [2022-03-03 19:10:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:37,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:37,009 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:37,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:37,209 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,SelfDestructingSolverStorable344 [2022-03-03 19:10:37,209 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1414662453, now seen corresponding path program 330 times [2022-03-03 19:10:37,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:37,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51748352] [2022-03-03 19:10:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:37,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:37,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:37,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51748352] [2022-03-03 19:10:37,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51748352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:37,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764096699] [2022-03-03 19:10:37,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:37,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:37,382 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) [2022-03-03 19:10:37,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-03-03 19:10:37,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:10:37,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:10:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:37,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:37,472 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 41 treesize of output 35 [2022-03-03 19:10:37,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:37,696 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:10:37,698 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 22 treesize of output 14 [2022-03-03 19:10:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:37,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:38,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:38,199 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-03-03 19:10:38,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:38,269 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 81 treesize of output 73 [2022-03-03 19:10:38,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:38,274 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 65 treesize of output 57 [2022-03-03 19:10:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:38,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764096699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:38,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:38,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:38,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911562925] [2022-03-03 19:10:38,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:38,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:38,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:38,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:38,326 INFO L87 Difference]: Start difference. First operand 2224 states and 7352 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:38,793 INFO L93 Difference]: Finished difference Result 3060 states and 9611 transitions. [2022-03-03 19:10:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:10:38,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:38,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:38,798 INFO L225 Difference]: With dead ends: 3060 [2022-03-03 19:10:38,798 INFO L226 Difference]: Without dead ends: 2954 [2022-03-03 19:10:38,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:10:38,798 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 141 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:38,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 358 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 578 Invalid, 0 Unknown, 324 Unchecked, 0.2s Time] [2022-03-03 19:10:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2022-03-03 19:10:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2235. [2022-03-03 19:10:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 3.307072515666965) internal successors, (7388), 2234 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 7388 transitions. [2022-03-03 19:10:38,830 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 7388 transitions. Word has length 24 [2022-03-03 19:10:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:38,830 INFO L470 AbstractCegarLoop]: Abstraction has 2235 states and 7388 transitions. [2022-03-03 19:10:38,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 7388 transitions. [2022-03-03 19:10:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:38,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:38,833 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:38,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:39,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-03-03 19:10:39,034 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash -411701403, now seen corresponding path program 331 times [2022-03-03 19:10:39,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:39,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939640911] [2022-03-03 19:10:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:39,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:39,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939640911] [2022-03-03 19:10:39,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939640911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:39,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821836010] [2022-03-03 19:10:39,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:39,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:39,211 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) [2022-03-03 19:10:39,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-03-03 19:10:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:39,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:39,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:39,299 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 41 treesize of output 35 [2022-03-03 19:10:39,509 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 [2022-03-03 19:10:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:39,511 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-03 19:10:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:39,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:40,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:40,115 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 87 treesize of output 81 [2022-03-03 19:10:40,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:40,222 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-03 19:10:40,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:40,227 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-03 19:10:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:40,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821836010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:40,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:40,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:40,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985650308] [2022-03-03 19:10:40,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:40,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:40,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:40,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:40,295 INFO L87 Difference]: Start difference. First operand 2235 states and 7388 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:40,616 INFO L93 Difference]: Finished difference Result 2652 states and 8550 transitions. [2022-03-03 19:10:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:40,617 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:40,621 INFO L225 Difference]: With dead ends: 2652 [2022-03-03 19:10:40,621 INFO L226 Difference]: Without dead ends: 2618 [2022-03-03 19:10:40,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:10:40,621 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 63 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:40,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 364 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 706 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-03-03 19:10:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2022-03-03 19:10:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2279. [2022-03-03 19:10:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 3.28972783143108) internal successors, (7494), 2278 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 7494 transitions. [2022-03-03 19:10:40,652 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 7494 transitions. Word has length 24 [2022-03-03 19:10:40,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:40,653 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 7494 transitions. [2022-03-03 19:10:40,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 7494 transitions. [2022-03-03 19:10:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:40,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:40,656 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:40,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-03-03 19:10:40,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:40,856 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:40,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1956066843, now seen corresponding path program 332 times [2022-03-03 19:10:40,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:40,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193282391] [2022-03-03 19:10:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:40,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:41,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:41,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193282391] [2022-03-03 19:10:41,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193282391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:41,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016538166] [2022-03-03 19:10:41,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:41,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:41,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:41,032 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) [2022-03-03 19:10:41,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-03-03 19:10:41,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:41,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:41,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:41,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:41,121 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 41 treesize of output 35 [2022-03-03 19:10:41,323 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 [2022-03-03 19:10:41,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:41,326 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-03 19:10:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:41,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:41,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:41,952 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 87 treesize of output 81 [2022-03-03 19:10:42,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:42,058 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-03 19:10:42,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:42,064 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 99 treesize of output 83 [2022-03-03 19:10:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:42,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016538166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:42,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:42,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:42,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274921403] [2022-03-03 19:10:42,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:42,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:42,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:42,140 INFO L87 Difference]: Start difference. First operand 2279 states and 7494 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:42,439 INFO L93 Difference]: Finished difference Result 2824 states and 9031 transitions. [2022-03-03 19:10:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:42,443 INFO L225 Difference]: With dead ends: 2824 [2022-03-03 19:10:42,443 INFO L226 Difference]: Without dead ends: 2821 [2022-03-03 19:10:42,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:10:42,444 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 147 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:42,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 311 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 410 Invalid, 0 Unknown, 651 Unchecked, 0.2s Time] [2022-03-03 19:10:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2022-03-03 19:10:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2309. [2022-03-03 19:10:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.2863951473136916) internal successors, (7585), 2308 states have internal predecessors, (7585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 7585 transitions. [2022-03-03 19:10:42,491 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 7585 transitions. Word has length 24 [2022-03-03 19:10:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:42,491 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 7585 transitions. [2022-03-03 19:10:42,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 7585 transitions. [2022-03-03 19:10:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:42,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:42,494 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:42,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-03-03 19:10:42,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:42,695 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:42,695 INFO L85 PathProgramCache]: Analyzing trace with hash 911591463, now seen corresponding path program 333 times [2022-03-03 19:10:42,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:42,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523697890] [2022-03-03 19:10:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:42,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:42,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:42,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523697890] [2022-03-03 19:10:42,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523697890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:42,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206421018] [2022-03-03 19:10:42,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:42,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:42,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:42,890 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) [2022-03-03 19:10:42,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-03-03 19:10:42,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:10:42,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:10:42,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:42,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:42,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:43,140 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 [2022-03-03 19:10:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:43,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:43,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:43,748 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 53 treesize of output 51 [2022-03-03 19:10:43,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:43,839 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 86 treesize of output 78 [2022-03-03 19:10:43,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:43,845 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-03-03 19:10:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:43,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206421018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:43,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:43,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 19:10:43,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893222574] [2022-03-03 19:10:43,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:43,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:43,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:43,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:43,897 INFO L87 Difference]: Start difference. First operand 2309 states and 7585 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2022-03-03 19:10:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:44,458 INFO L93 Difference]: Finished difference Result 2974 states and 9339 transitions. [2022-03-03 19:10:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:10:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 24 [2022-03-03 19:10:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:44,463 INFO L225 Difference]: With dead ends: 2974 [2022-03-03 19:10:44,463 INFO L226 Difference]: Without dead ends: 2809 [2022-03-03 19:10:44,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:10:44,464 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 120 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:44,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 298 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 787 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-03-03 19:10:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2022-03-03 19:10:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2233. [2022-03-03 19:10:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.3015232974910393) internal successors, (7369), 2232 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 7369 transitions. [2022-03-03 19:10:44,494 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 7369 transitions. Word has length 24 [2022-03-03 19:10:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:44,494 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 7369 transitions. [2022-03-03 19:10:44,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2022-03-03 19:10:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 7369 transitions. [2022-03-03 19:10:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:44,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:44,497 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:44,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:44,697 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,SelfDestructingSolverStorable348 [2022-03-03 19:10:44,697 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1789243013, now seen corresponding path program 334 times [2022-03-03 19:10:44,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:44,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67839773] [2022-03-03 19:10:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:44,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:44,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:44,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67839773] [2022-03-03 19:10:44,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67839773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:44,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838083406] [2022-03-03 19:10:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:44,879 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) [2022-03-03 19:10:44,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-03-03 19:10:44,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:44,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:44,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:44,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:44,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:44,968 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 [2022-03-03 19:10:45,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:45,105 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-03 19:10:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:45,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:45,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:45,679 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 87 treesize of output 81 [2022-03-03 19:10:45,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:45,783 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 123 treesize of output 107 [2022-03-03 19:10:45,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:45,789 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 99 treesize of output 83 [2022-03-03 19:10:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:45,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838083406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:45,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:45,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:45,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058743729] [2022-03-03 19:10:45,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:45,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:45,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:45,896 INFO L87 Difference]: Start difference. First operand 2233 states and 7369 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:46,310 INFO L93 Difference]: Finished difference Result 2487 states and 8073 transitions. [2022-03-03 19:10:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:46,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:46,314 INFO L225 Difference]: With dead ends: 2487 [2022-03-03 19:10:46,314 INFO L226 Difference]: Without dead ends: 2417 [2022-03-03 19:10:46,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:10:46,314 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:46,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 345 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 676 Invalid, 0 Unknown, 483 Unchecked, 0.3s Time] [2022-03-03 19:10:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-03-03 19:10:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2243. [2022-03-03 19:10:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.297948260481713) internal successors, (7394), 2242 states have internal predecessors, (7394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 7394 transitions. [2022-03-03 19:10:46,340 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 7394 transitions. Word has length 24 [2022-03-03 19:10:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:46,340 INFO L470 AbstractCegarLoop]: Abstraction has 2243 states and 7394 transitions. [2022-03-03 19:10:46,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 7394 transitions. [2022-03-03 19:10:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:46,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:46,343 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:46,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:46,543 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,SelfDestructingSolverStorable349 [2022-03-03 19:10:46,543 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash -162108105, now seen corresponding path program 335 times [2022-03-03 19:10:46,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:46,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096261983] [2022-03-03 19:10:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:46,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:46,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:46,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096261983] [2022-03-03 19:10:46,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096261983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:46,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155636117] [2022-03-03 19:10:46,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:46,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:46,746 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) [2022-03-03 19:10:46,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-03-03 19:10:46,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:10:46,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:46,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:46,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:46,836 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 [2022-03-03 19:10:46,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:46,962 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 43 treesize of output 37 [2022-03-03 19:10:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:47,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:47,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:47,535 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 87 treesize of output 81 [2022-03-03 19:10:47,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:47,693 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 114 [2022-03-03 19:10:47,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:47,699 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 106 treesize of output 90 [2022-03-03 19:10:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:47,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155636117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:47,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:47,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:47,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351865620] [2022-03-03 19:10:47,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:47,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:47,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:47,778 INFO L87 Difference]: Start difference. First operand 2243 states and 7394 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:48,312 INFO L93 Difference]: Finished difference Result 2561 states and 8234 transitions. [2022-03-03 19:10:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:48,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:48,316 INFO L225 Difference]: With dead ends: 2561 [2022-03-03 19:10:48,316 INFO L226 Difference]: Without dead ends: 2491 [2022-03-03 19:10:48,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:10:48,316 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:48,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 365 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1003 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-03-03 19:10:48,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-03-03 19:10:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 2245. [2022-03-03 19:10:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.2972370766488415) internal successors, (7399), 2244 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7399 transitions. [2022-03-03 19:10:48,343 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7399 transitions. Word has length 24 [2022-03-03 19:10:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:48,343 INFO L470 AbstractCegarLoop]: Abstraction has 2245 states and 7399 transitions. [2022-03-03 19:10:48,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7399 transitions. [2022-03-03 19:10:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:48,346 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:48,346 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:48,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-03-03 19:10:48,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:48,546 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1248252165, now seen corresponding path program 336 times [2022-03-03 19:10:48,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:48,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689337828] [2022-03-03 19:10:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:48,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:48,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:48,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689337828] [2022-03-03 19:10:48,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689337828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:48,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361242537] [2022-03-03 19:10:48,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:48,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:48,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:48,720 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) [2022-03-03 19:10:48,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-03-03 19:10:48,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:10:48,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:48,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:48,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:48,810 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 41 treesize of output 35 [2022-03-03 19:10:48,977 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 [2022-03-03 19:10:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:49,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:49,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:49,556 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-03 19:10:49,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:49,681 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 126 treesize of output 110 [2022-03-03 19:10:49,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:49,687 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 102 treesize of output 86 [2022-03-03 19:10:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:49,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361242537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:49,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:49,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:10:49,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413952824] [2022-03-03 19:10:49,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:49,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:10:49,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:10:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:10:49,753 INFO L87 Difference]: Start difference. First operand 2245 states and 7399 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:49,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:49,950 INFO L93 Difference]: Finished difference Result 2410 states and 7843 transitions. [2022-03-03 19:10:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:10:49,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:49,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:49,954 INFO L225 Difference]: With dead ends: 2410 [2022-03-03 19:10:49,954 INFO L226 Difference]: Without dead ends: 2391 [2022-03-03 19:10:49,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:10:49,954 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:49,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 235 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 446 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-03-03 19:10:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-03-03 19:10:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2255. [2022-03-03 19:10:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 3.294587400177462) internal successors, (7426), 2254 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 7426 transitions. [2022-03-03 19:10:49,979 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 7426 transitions. Word has length 24 [2022-03-03 19:10:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:49,979 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 7426 transitions. [2022-03-03 19:10:49,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 7426 transitions. [2022-03-03 19:10:49,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:49,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:49,982 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:49,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:50,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:50,183 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:50,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:50,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2128691225, now seen corresponding path program 337 times [2022-03-03 19:10:50,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:50,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872024453] [2022-03-03 19:10:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:50,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:50,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:50,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872024453] [2022-03-03 19:10:50,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872024453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:50,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722158312] [2022-03-03 19:10:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:50,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:50,369 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) [2022-03-03 19:10:50,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-03-03 19:10:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:50,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:50,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:50,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:50,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:50,644 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 24 treesize of output 20 [2022-03-03 19:10:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:50,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:51,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:51,204 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 87 treesize of output 81 [2022-03-03 19:10:51,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:51,308 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-03 19:10:51,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:51,314 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 99 treesize of output 83 [2022-03-03 19:10:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:51,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722158312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:51,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:51,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:51,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487289685] [2022-03-03 19:10:51,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:51,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:51,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:51,382 INFO L87 Difference]: Start difference. First operand 2255 states and 7426 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:51,678 INFO L93 Difference]: Finished difference Result 2421 states and 7867 transitions. [2022-03-03 19:10:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:10:51,679 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:51,683 INFO L225 Difference]: With dead ends: 2421 [2022-03-03 19:10:51,683 INFO L226 Difference]: Without dead ends: 2406 [2022-03-03 19:10:51,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:51,683 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:51,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 257 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 708 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2022-03-03 19:10:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2022-03-03 19:10:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2255. [2022-03-03 19:10:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 3.294587400177462) internal successors, (7426), 2254 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 7426 transitions. [2022-03-03 19:10:51,710 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 7426 transitions. Word has length 24 [2022-03-03 19:10:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:51,710 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 7426 transitions. [2022-03-03 19:10:51,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 7426 transitions. [2022-03-03 19:10:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:51,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:51,713 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:51,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:51,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:51,913 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash -753477275, now seen corresponding path program 338 times [2022-03-03 19:10:51,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:51,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77011150] [2022-03-03 19:10:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:51,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:52,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:52,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77011150] [2022-03-03 19:10:52,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77011150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:52,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760190516] [2022-03-03 19:10:52,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:52,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:52,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:52,076 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) [2022-03-03 19:10:52,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-03-03 19:10:52,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:52,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:52,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:52,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:52,172 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 41 treesize of output 35 [2022-03-03 19:10:52,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:52,376 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 24 treesize of output 20 [2022-03-03 19:10:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:52,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:52,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:52,934 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 87 treesize of output 81 [2022-03-03 19:10:53,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:53,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2022-03-03 19:10:53,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:53,081 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 85 [2022-03-03 19:10:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:53,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760190516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:53,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:53,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:53,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476071900] [2022-03-03 19:10:53,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:53,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:53,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:53,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:53,142 INFO L87 Difference]: Start difference. First operand 2255 states and 7426 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:53,305 INFO L93 Difference]: Finished difference Result 2407 states and 7835 transitions. [2022-03-03 19:10:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:10:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:53,310 INFO L225 Difference]: With dead ends: 2407 [2022-03-03 19:10:53,310 INFO L226 Difference]: Without dead ends: 2400 [2022-03-03 19:10:53,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:53,310 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:53,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 302 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 336 Invalid, 0 Unknown, 222 Unchecked, 0.1s Time] [2022-03-03 19:10:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-03-03 19:10:53,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2259. [2022-03-03 19:10:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 3.2931798051372896) internal successors, (7436), 2258 states have internal predecessors, (7436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 7436 transitions. [2022-03-03 19:10:53,336 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 7436 transitions. Word has length 24 [2022-03-03 19:10:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:53,336 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 7436 transitions. [2022-03-03 19:10:53,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 7436 transitions. [2022-03-03 19:10:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:53,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:53,339 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:53,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:53,539 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,SelfDestructingSolverStorable353 [2022-03-03 19:10:53,539 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1428859203, now seen corresponding path program 339 times [2022-03-03 19:10:53,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:53,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833169199] [2022-03-03 19:10:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:53,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:53,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:53,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833169199] [2022-03-03 19:10:53,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833169199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:53,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2700997] [2022-03-03 19:10:53,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:53,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:53,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:53,701 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) [2022-03-03 19:10:53,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-03-03 19:10:53,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:10:53,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:53,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:53,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:53,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:53,789 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 41 treesize of output 35 [2022-03-03 19:10:54,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:54,009 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 24 treesize of output 20 [2022-03-03 19:10:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:54,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:54,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:54,584 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 87 treesize of output 81 [2022-03-03 19:10:54,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:54,687 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 123 treesize of output 107 [2022-03-03 19:10:54,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:54,693 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-03 19:10:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:54,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2700997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:54,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:54,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:54,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127101456] [2022-03-03 19:10:54,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:54,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:54,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:54,759 INFO L87 Difference]: Start difference. First operand 2259 states and 7436 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:55,092 INFO L93 Difference]: Finished difference Result 2403 states and 7825 transitions. [2022-03-03 19:10:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:10:55,093 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:55,097 INFO L225 Difference]: With dead ends: 2403 [2022-03-03 19:10:55,097 INFO L226 Difference]: Without dead ends: 2400 [2022-03-03 19:10:55,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:55,097 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:55,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 344 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 824 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-03-03 19:10:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-03-03 19:10:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2245. [2022-03-03 19:10:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.2972370766488415) internal successors, (7399), 2244 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7399 transitions. [2022-03-03 19:10:55,123 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7399 transitions. Word has length 24 [2022-03-03 19:10:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:55,123 INFO L470 AbstractCegarLoop]: Abstraction has 2245 states and 7399 transitions. [2022-03-03 19:10:55,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:55,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7399 transitions. [2022-03-03 19:10:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:55,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:55,126 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:55,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:55,327 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,SelfDestructingSolverStorable354 [2022-03-03 19:10:55,327 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash 141467187, now seen corresponding path program 340 times [2022-03-03 19:10:55,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:55,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863655328] [2022-03-03 19:10:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:55,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:55,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:55,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863655328] [2022-03-03 19:10:55,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863655328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:55,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840201516] [2022-03-03 19:10:55,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:55,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:55,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:55,503 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) [2022-03-03 19:10:55,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-03-03 19:10:55,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:55,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:55,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:55,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:55,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:55,597 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:10:55,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:55,731 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 24 treesize of output 20 [2022-03-03 19:10:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:55,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:56,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:56,247 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 87 treesize of output 81 [2022-03-03 19:10:56,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:56,398 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 127 treesize of output 111 [2022-03-03 19:10:56,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:56,404 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 103 treesize of output 87 [2022-03-03 19:10:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:56,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840201516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:56,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:56,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:10:56,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442770303] [2022-03-03 19:10:56,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:56,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:10:56,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:10:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:56,486 INFO L87 Difference]: Start difference. First operand 2245 states and 7399 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:57,056 INFO L93 Difference]: Finished difference Result 2807 states and 8911 transitions. [2022-03-03 19:10:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:10:57,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:10:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:57,061 INFO L225 Difference]: With dead ends: 2807 [2022-03-03 19:10:57,061 INFO L226 Difference]: Without dead ends: 2746 [2022-03-03 19:10:57,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:10:57,061 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 97 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:57,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 362 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 600 Invalid, 0 Unknown, 401 Unchecked, 0.3s Time] [2022-03-03 19:10:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2022-03-03 19:10:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2295. [2022-03-03 19:10:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 3.2824760244115083) internal successors, (7530), 2294 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:57,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7530 transitions. [2022-03-03 19:10:57,090 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7530 transitions. Word has length 24 [2022-03-03 19:10:57,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:57,090 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 7530 transitions. [2022-03-03 19:10:57,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7530 transitions. [2022-03-03 19:10:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:57,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:57,093 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:57,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-03-03 19:10:57,294 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,SelfDestructingSolverStorable355 [2022-03-03 19:10:57,294 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:57,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1213111501, now seen corresponding path program 341 times [2022-03-03 19:10:57,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:57,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475829778] [2022-03-03 19:10:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:57,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:57,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:57,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475829778] [2022-03-03 19:10:57,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475829778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:57,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910071007] [2022-03-03 19:10:57,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:57,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:57,466 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) [2022-03-03 19:10:57,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-03-03 19:10:57,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:10:57,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:10:57,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:57,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:57,555 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 41 treesize of output 35 [2022-03-03 19:10:57,665 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 [2022-03-03 19:10:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:57,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:58,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:58,270 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-03 19:10:58,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:58,390 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 126 treesize of output 110 [2022-03-03 19:10:58,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:58,395 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-03 19:10:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:58,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910071007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:58,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:58,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-03 19:10:58,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469423944] [2022-03-03 19:10:58,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:58,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:10:58,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:10:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:10:58,462 INFO L87 Difference]: Start difference. First operand 2295 states and 7530 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2022-03-03 19:10:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:58,880 INFO L93 Difference]: Finished difference Result 2737 states and 8733 transitions. [2022-03-03 19:10:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:10:58,880 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 24 [2022-03-03 19:10:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:58,885 INFO L225 Difference]: With dead ends: 2737 [2022-03-03 19:10:58,885 INFO L226 Difference]: Without dead ends: 2734 [2022-03-03 19:10:58,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:10:58,885 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:58,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 283 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 756 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2022-03-03 19:10:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2022-03-03 19:10:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 2281. [2022-03-03 19:10:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2280 states have (on average 3.287280701754386) internal successors, (7495), 2280 states have internal predecessors, (7495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 7495 transitions. [2022-03-03 19:10:58,913 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 7495 transitions. Word has length 24 [2022-03-03 19:10:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:58,913 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 7495 transitions. [2022-03-03 19:10:58,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2022-03-03 19:10:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 7495 transitions. [2022-03-03 19:10:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:10:58,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:58,916 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:10:58,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:59,116 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,SelfDestructingSolverStorable356 [2022-03-03 19:10:59,116 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:59,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1971656619, now seen corresponding path program 342 times [2022-03-03 19:10:59,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:59,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991669903] [2022-03-03 19:10:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:59,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:59,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:59,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991669903] [2022-03-03 19:10:59,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991669903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:59,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863516259] [2022-03-03 19:10:59,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:59,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:59,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:59,288 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) [2022-03-03 19:10:59,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-03-03 19:10:59,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:10:59,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:59,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:10:59,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:59,399 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 [2022-03-03 19:10:59,504 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 52 treesize of output 44 [2022-03-03 19:10:59,505 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 [2022-03-03 19:10:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:10:59,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:59,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:59,967 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-03-03 19:11:00,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:00,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 75 [2022-03-03 19:11:00,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:00,212 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 67 treesize of output 59 [2022-03-03 19:11:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:00,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863516259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:00,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:00,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:11:00,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792580694] [2022-03-03 19:11:00,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:00,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:00,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:00,291 INFO L87 Difference]: Start difference. First operand 2281 states and 7495 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:01,372 INFO L93 Difference]: Finished difference Result 2508 states and 8108 transitions. [2022-03-03 19:11:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:11:01,373 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:11:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:01,377 INFO L225 Difference]: With dead ends: 2508 [2022-03-03 19:11:01,377 INFO L226 Difference]: Without dead ends: 2426 [2022-03-03 19:11:01,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:11:01,377 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:01,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 344 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:11:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2022-03-03 19:11:01,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2291. [2022-03-03 19:11:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.2838427947598254) internal successors, (7520), 2290 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 7520 transitions. [2022-03-03 19:11:01,404 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 7520 transitions. Word has length 24 [2022-03-03 19:11:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:01,404 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 7520 transitions. [2022-03-03 19:11:01,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 7520 transitions. [2022-03-03 19:11:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:01,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:01,407 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:01,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:01,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:01,608 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash 873231215, now seen corresponding path program 343 times [2022-03-03 19:11:01,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:01,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259797431] [2022-03-03 19:11:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:01,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:01,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:01,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259797431] [2022-03-03 19:11:01,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259797431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:01,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497400848] [2022-03-03 19:11:01,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:01,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:01,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:01,779 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) [2022-03-03 19:11:01,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-03-03 19:11:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:01,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:11:01,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:01,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:01,938 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 55 treesize of output 47 [2022-03-03 19:11:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:02,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:02,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:02,375 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 77 treesize of output 75 [2022-03-03 19:11:02,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:02,626 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 126 treesize of output 110 [2022-03-03 19:11:02,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:02,632 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-03 19:11:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:02,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497400848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:02,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:02,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:11:02,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205145158] [2022-03-03 19:11:02,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:02,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:11:02,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:11:02,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:11:02,700 INFO L87 Difference]: Start difference. First operand 2291 states and 7520 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:03,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:03,304 INFO L93 Difference]: Finished difference Result 2441 states and 7917 transitions. [2022-03-03 19:11:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:11:03,305 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:11:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:03,309 INFO L225 Difference]: With dead ends: 2441 [2022-03-03 19:11:03,309 INFO L226 Difference]: Without dead ends: 2406 [2022-03-03 19:11:03,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:11:03,309 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:03,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 204 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2022-03-03 19:11:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2287. [2022-03-03 19:11:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 3.285214348206474) internal successors, (7510), 2286 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 7510 transitions. [2022-03-03 19:11:03,338 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 7510 transitions. Word has length 24 [2022-03-03 19:11:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:03,338 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 7510 transitions. [2022-03-03 19:11:03,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 7510 transitions. [2022-03-03 19:11:03,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:03,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:03,341 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:03,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:03,541 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,SelfDestructingSolverStorable358 [2022-03-03 19:11:03,542 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1216007631, now seen corresponding path program 344 times [2022-03-03 19:11:03,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:03,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844823257] [2022-03-03 19:11:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:03,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:03,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:03,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844823257] [2022-03-03 19:11:03,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844823257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:03,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362524380] [2022-03-03 19:11:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:03,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:03,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:03,707 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) [2022-03-03 19:11:03,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-03-03 19:11:03,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:03,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:03,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:11:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:03,855 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 41 treesize of output 35 [2022-03-03 19:11:03,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:03,968 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 47 treesize of output 41 [2022-03-03 19:11:03,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:03,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:11:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:04,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:04,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:04,692 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 83 treesize of output 74 [2022-03-03 19:11:04,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:04,808 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 31 treesize of output 33 [2022-03-03 19:11:04,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:04,811 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 25 treesize of output 27 [2022-03-03 19:11:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:04,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362524380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:04,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:04,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:11:04,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222551008] [2022-03-03 19:11:04,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:04,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:11:04,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:11:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:11:04,833 INFO L87 Difference]: Start difference. First operand 2287 states and 7510 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:05,664 INFO L93 Difference]: Finished difference Result 2645 states and 8376 transitions. [2022-03-03 19:11:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:11:05,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) Word has length 24 [2022-03-03 19:11:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:05,668 INFO L225 Difference]: With dead ends: 2645 [2022-03-03 19:11:05,668 INFO L226 Difference]: Without dead ends: 2520 [2022-03-03 19:11:05,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:11:05,669 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:05,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 331 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 906 Invalid, 0 Unknown, 196 Unchecked, 0.4s Time] [2022-03-03 19:11:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2022-03-03 19:11:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2287. [2022-03-03 19:11:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 3.285214348206474) internal successors, (7510), 2286 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 7510 transitions. [2022-03-03 19:11:05,706 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 7510 transitions. Word has length 24 [2022-03-03 19:11:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:05,706 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 7510 transitions. [2022-03-03 19:11:05,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 7510 transitions. [2022-03-03 19:11:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:05,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:05,709 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:05,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-03-03 19:11:05,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:05,909 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:05,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1499680715, now seen corresponding path program 345 times [2022-03-03 19:11:05,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:05,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803907002] [2022-03-03 19:11:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:05,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:06,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:06,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803907002] [2022-03-03 19:11:06,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803907002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:06,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996611715] [2022-03-03 19:11:06,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:06,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:06,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:06,112 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) [2022-03-03 19:11:06,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-03-03 19:11:06,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:11:06,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:11:06,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:06,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:06,255 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-03 19:11:06,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:06,308 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 47 treesize of output 41 [2022-03-03 19:11:06,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:06,311 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 37 treesize of output 21 [2022-03-03 19:11:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:06,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:07,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:07,133 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-03 19:11:07,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:07,241 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 31 treesize of output 33 [2022-03-03 19:11:07,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:07,245 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 25 treesize of output 27 [2022-03-03 19:11:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:07,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996611715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:07,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:07,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:11:07,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858712084] [2022-03-03 19:11:07,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:07,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:11:07,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:07,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:11:07,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:11:07,262 INFO L87 Difference]: Start difference. First operand 2287 states and 7510 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:07,877 INFO L93 Difference]: Finished difference Result 2630 states and 8389 transitions. [2022-03-03 19:11:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:07,877 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:11:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:07,882 INFO L225 Difference]: With dead ends: 2630 [2022-03-03 19:11:07,882 INFO L226 Difference]: Without dead ends: 2537 [2022-03-03 19:11:07,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:11:07,882 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 164 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:07,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 198 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 546 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-03-03 19:11:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-03-03 19:11:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2288. [2022-03-03 19:11:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 3.285964145168343) internal successors, (7515), 2287 states have internal predecessors, (7515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 7515 transitions. [2022-03-03 19:11:07,923 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 7515 transitions. Word has length 24 [2022-03-03 19:11:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:07,923 INFO L470 AbstractCegarLoop]: Abstraction has 2288 states and 7515 transitions. [2022-03-03 19:11:07,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 7515 transitions. [2022-03-03 19:11:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:07,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:07,926 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:07,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-03-03 19:11:08,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:08,127 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash 926755951, now seen corresponding path program 346 times [2022-03-03 19:11:08,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:08,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772975242] [2022-03-03 19:11:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:08,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:08,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772975242] [2022-03-03 19:11:08,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772975242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:08,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155743316] [2022-03-03 19:11:08,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:08,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:08,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:08,344 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) [2022-03-03 19:11:08,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-03-03 19:11:08,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:08,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:08,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:11:08,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:08,448 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 35 [2022-03-03 19:11:08,495 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 41 [2022-03-03 19:11:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:08,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:09,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:09,269 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 110 treesize of output 98 [2022-03-03 19:11:09,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:09,425 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 35 treesize of output 37 [2022-03-03 19:11:09,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:09,429 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 29 treesize of output 31 [2022-03-03 19:11:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:09,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155743316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:09,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:09,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:11:09,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892200483] [2022-03-03 19:11:09,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:09,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:11:09,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:11:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:11:09,444 INFO L87 Difference]: Start difference. First operand 2288 states and 7515 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2022-03-03 19:11:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:10,909 INFO L93 Difference]: Finished difference Result 3251 states and 10106 transitions. [2022-03-03 19:11:10,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:11:10,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 24 [2022-03-03 19:11:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:10,915 INFO L225 Difference]: With dead ends: 3251 [2022-03-03 19:11:10,915 INFO L226 Difference]: Without dead ends: 3069 [2022-03-03 19:11:10,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:11:10,915 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 187 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:10,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 421 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:11:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2022-03-03 19:11:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2290. [2022-03-03 19:11:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 3.2870249017038007) internal successors, (7524), 2289 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 7524 transitions. [2022-03-03 19:11:10,948 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 7524 transitions. Word has length 24 [2022-03-03 19:11:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:10,948 INFO L470 AbstractCegarLoop]: Abstraction has 2290 states and 7524 transitions. [2022-03-03 19:11:10,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2022-03-03 19:11:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 7524 transitions. [2022-03-03 19:11:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:10,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:10,951 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:10,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:11,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:11,151 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:11,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:11,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1580559143, now seen corresponding path program 347 times [2022-03-03 19:11:11,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:11,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777072130] [2022-03-03 19:11:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:11,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:11,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777072130] [2022-03-03 19:11:11,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777072130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:11,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215097216] [2022-03-03 19:11:11,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:11,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:11,336 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) [2022-03-03 19:11:11,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-03-03 19:11:11,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:11:11,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:11:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:11,419 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 35 [2022-03-03 19:11:11,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:11,621 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 23 treesize of output 19 [2022-03-03 19:11:11,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:11,623 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 12 treesize of output 3 [2022-03-03 19:11:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:11,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:12,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:12,176 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 51 treesize of output 48 [2022-03-03 19:11:12,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:12,228 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 31 treesize of output 33 [2022-03-03 19:11:12,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:12,232 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 25 treesize of output 27 [2022-03-03 19:11:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:12,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215097216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:12,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:12,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:11:12,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400930658] [2022-03-03 19:11:12,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:12,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:11:12,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:11:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:11:12,249 INFO L87 Difference]: Start difference. First operand 2290 states and 7524 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:12,962 INFO L93 Difference]: Finished difference Result 2968 states and 9703 transitions. [2022-03-03 19:11:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:11:12,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) Word has length 24 [2022-03-03 19:11:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:12,968 INFO L225 Difference]: With dead ends: 2968 [2022-03-03 19:11:12,968 INFO L226 Difference]: Without dead ends: 2906 [2022-03-03 19:11:12,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:11:12,968 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 109 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:12,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 381 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 755 Invalid, 0 Unknown, 333 Unchecked, 0.3s Time] [2022-03-03 19:11:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-03-03 19:11:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2286. [2022-03-03 19:11:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 3.287527352297593) internal successors, (7512), 2285 states have internal predecessors, (7512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 7512 transitions. [2022-03-03 19:11:12,999 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 7512 transitions. Word has length 24 [2022-03-03 19:11:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:12,999 INFO L470 AbstractCegarLoop]: Abstraction has 2286 states and 7512 transitions. [2022-03-03 19:11:12,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 7512 transitions. [2022-03-03 19:11:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:13,002 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:13,002 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:13,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:13,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:13,203 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1361431313, now seen corresponding path program 348 times [2022-03-03 19:11:13,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:13,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769215845] [2022-03-03 19:11:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:13,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:13,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:13,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769215845] [2022-03-03 19:11:13,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769215845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:13,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111271487] [2022-03-03 19:11:13,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:13,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:13,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:13,401 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) [2022-03-03 19:11:13,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-03-03 19:11:13,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:11:13,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:11:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:13,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:13,485 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 [2022-03-03 19:11:13,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:13,804 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 43 treesize of output 37 [2022-03-03 19:11:13,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:13,806 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 37 treesize of output 21 [2022-03-03 19:11:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:13,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:14,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:14,543 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-03 19:11:14,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:14,597 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 31 treesize of output 33 [2022-03-03 19:11:14,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:14,600 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 25 treesize of output 27 [2022-03-03 19:11:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:14,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111271487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:14,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:14,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 19:11:14,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309267001] [2022-03-03 19:11:14,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:14,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:14,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:14,621 INFO L87 Difference]: Start difference. First operand 2286 states and 7512 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-03-03 19:11:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:15,115 INFO L93 Difference]: Finished difference Result 2421 states and 7923 transitions. [2022-03-03 19:11:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:11:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 24 [2022-03-03 19:11:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:15,120 INFO L225 Difference]: With dead ends: 2421 [2022-03-03 19:11:15,120 INFO L226 Difference]: Without dead ends: 2390 [2022-03-03 19:11:15,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:11:15,120 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:15,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 240 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 589 Invalid, 0 Unknown, 386 Unchecked, 0.2s Time] [2022-03-03 19:11:15,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2022-03-03 19:11:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2287. [2022-03-03 19:11:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 3.28827646544182) internal successors, (7517), 2286 states have internal predecessors, (7517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 7517 transitions. [2022-03-03 19:11:15,145 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 7517 transitions. Word has length 24 [2022-03-03 19:11:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:15,145 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 7517 transitions. [2022-03-03 19:11:15,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-03-03 19:11:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 7517 transitions. [2022-03-03 19:11:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:15,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:15,148 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:15,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:15,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:15,349 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:15,349 INFO L85 PathProgramCache]: Analyzing trace with hash 196989049, now seen corresponding path program 349 times [2022-03-03 19:11:15,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:15,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101718102] [2022-03-03 19:11:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:15,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:15,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:15,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101718102] [2022-03-03 19:11:15,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101718102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:15,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260583706] [2022-03-03 19:11:15,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:15,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:15,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:15,554 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) [2022-03-03 19:11:15,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-03-03 19:11:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:15,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:11:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:15,632 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 35 [2022-03-03 19:11:15,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:15,795 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 43 treesize of output 37 [2022-03-03 19:11:15,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:15,797 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 37 treesize of output 21 [2022-03-03 19:11:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:15,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:16,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:16,540 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 69 treesize of output 63 [2022-03-03 19:11:16,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:16,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:11:16,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:16,632 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:11:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:16,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260583706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:16,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:16,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:11:16,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904714621] [2022-03-03 19:11:16,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:16,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:11:16,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:16,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:11:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:11:16,655 INFO L87 Difference]: Start difference. First operand 2287 states and 7517 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:18,874 INFO L93 Difference]: Finished difference Result 3311 states and 10443 transitions. [2022-03-03 19:11:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:11:18,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) Word has length 24 [2022-03-03 19:11:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:18,879 INFO L225 Difference]: With dead ends: 3311 [2022-03-03 19:11:18,879 INFO L226 Difference]: Without dead ends: 3085 [2022-03-03 19:11:18,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:11:18,880 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 244 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:18,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 512 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1387 Invalid, 0 Unknown, 117 Unchecked, 0.7s Time] [2022-03-03 19:11:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-03-03 19:11:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2297. [2022-03-03 19:11:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2296 states have (on average 3.2939895470383274) internal successors, (7563), 2296 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 7563 transitions. [2022-03-03 19:11:18,920 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 7563 transitions. Word has length 24 [2022-03-03 19:11:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:18,920 INFO L470 AbstractCegarLoop]: Abstraction has 2297 states and 7563 transitions. [2022-03-03 19:11:18,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 7563 transitions. [2022-03-03 19:11:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:18,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:18,923 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:18,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-03-03 19:11:19,123 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,SelfDestructingSolverStorable364 [2022-03-03 19:11:19,124 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash -787056345, now seen corresponding path program 350 times [2022-03-03 19:11:19,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:19,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309257754] [2022-03-03 19:11:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:19,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:19,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:19,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309257754] [2022-03-03 19:11:19,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309257754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:19,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743995995] [2022-03-03 19:11:19,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:19,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:19,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:19,308 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) [2022-03-03 19:11:19,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-03-03 19:11:19,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:19,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:19,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:11:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:19,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 35 [2022-03-03 19:11:19,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:19,627 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 43 treesize of output 37 [2022-03-03 19:11:19,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:19,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:11:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:19,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:20,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:20,293 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 120 treesize of output 104 [2022-03-03 19:11:20,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:20,413 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 31 treesize of output 33 [2022-03-03 19:11:20,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:20,416 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 25 treesize of output 27 [2022-03-03 19:11:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:20,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743995995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:20,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:20,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:11:20,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523939788] [2022-03-03 19:11:20,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:20,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:11:20,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:20,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:11:20,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:11:20,433 INFO L87 Difference]: Start difference. First operand 2297 states and 7563 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:21,581 INFO L93 Difference]: Finished difference Result 2968 states and 9595 transitions. [2022-03-03 19:11:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:11:21,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) Word has length 24 [2022-03-03 19:11:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:21,587 INFO L225 Difference]: With dead ends: 2968 [2022-03-03 19:11:21,587 INFO L226 Difference]: Without dead ends: 2933 [2022-03-03 19:11:21,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:11:21,587 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 106 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:21,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 487 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1215 Invalid, 0 Unknown, 493 Unchecked, 0.5s Time] [2022-03-03 19:11:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-03-03 19:11:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2297. [2022-03-03 19:11:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2296 states have (on average 3.2939895470383274) internal successors, (7563), 2296 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 7563 transitions. [2022-03-03 19:11:21,626 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 7563 transitions. Word has length 24 [2022-03-03 19:11:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:21,626 INFO L470 AbstractCegarLoop]: Abstraction has 2297 states and 7563 transitions. [2022-03-03 19:11:21,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 7563 transitions. [2022-03-03 19:11:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:21,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:21,630 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:21,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:21,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:21,830 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:21,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:21,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2083620671, now seen corresponding path program 351 times [2022-03-03 19:11:21,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:21,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525508137] [2022-03-03 19:11:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:21,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:22,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:22,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525508137] [2022-03-03 19:11:22,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525508137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:22,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97197143] [2022-03-03 19:11:22,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:22,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:22,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:22,013 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) [2022-03-03 19:11:22,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-03-03 19:11:22,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:11:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:22,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:11:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:22,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:22,089 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 41 treesize of output 35 [2022-03-03 19:11:22,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:22,306 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 43 treesize of output 37 [2022-03-03 19:11:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:22,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:22,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:22,899 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 78 treesize of output 70 [2022-03-03 19:11:22,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:22,997 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 35 treesize of output 37 [2022-03-03 19:11:23,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:23,001 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 29 treesize of output 31 [2022-03-03 19:11:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:23,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97197143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:23,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:23,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:11:23,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303589105] [2022-03-03 19:11:23,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:23,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:11:23,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:23,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:11:23,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:11:23,016 INFO L87 Difference]: Start difference. First operand 2297 states and 7563 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:24,417 INFO L93 Difference]: Finished difference Result 3282 states and 10206 transitions. [2022-03-03 19:11:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:11:24,417 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) Word has length 24 [2022-03-03 19:11:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:24,432 INFO L225 Difference]: With dead ends: 3282 [2022-03-03 19:11:24,432 INFO L226 Difference]: Without dead ends: 3075 [2022-03-03 19:11:24,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:11:24,432 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 212 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:24,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 545 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1178 Invalid, 0 Unknown, 332 Unchecked, 0.5s Time] [2022-03-03 19:11:24,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2022-03-03 19:11:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2301. [2022-03-03 19:11:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 3.2917391304347827) internal successors, (7571), 2300 states have internal predecessors, (7571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 7571 transitions. [2022-03-03 19:11:24,464 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 7571 transitions. Word has length 24 [2022-03-03 19:11:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:24,465 INFO L470 AbstractCegarLoop]: Abstraction has 2301 states and 7571 transitions. [2022-03-03 19:11:24,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 7571 transitions. [2022-03-03 19:11:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:24,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:24,467 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:24,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:24,668 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,SelfDestructingSolverStorable366 [2022-03-03 19:11:24,668 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1489970191, now seen corresponding path program 352 times [2022-03-03 19:11:24,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:24,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687982444] [2022-03-03 19:11:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:24,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:11:24,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:24,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687982444] [2022-03-03 19:11:24,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687982444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:24,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192207344] [2022-03-03 19:11:24,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:24,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:24,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:24,846 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) [2022-03-03 19:11:24,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-03-03 19:11:24,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:24,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:24,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:11:24,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:24,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:24,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:11:25,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:25,184 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-03 19:11:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:11:25,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:25,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:25,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-03 19:11:25,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:25,883 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:11:25,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:25,886 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-03 19:11:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:11:25,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192207344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:25,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:25,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:11:25,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199238404] [2022-03-03 19:11:25,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:25,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:11:25,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:25,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:11:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:11:25,902 INFO L87 Difference]: Start difference. First operand 2301 states and 7571 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:26,563 INFO L93 Difference]: Finished difference Result 2854 states and 9234 transitions. [2022-03-03 19:11:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:11:26,563 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:11:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:26,568 INFO L225 Difference]: With dead ends: 2854 [2022-03-03 19:11:26,568 INFO L226 Difference]: Without dead ends: 2835 [2022-03-03 19:11:26,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:11:26,568 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:26,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 328 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 937 Invalid, 0 Unknown, 174 Unchecked, 0.4s Time] [2022-03-03 19:11:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-03-03 19:11:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2283. [2022-03-03 19:11:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 3.2953549517966696) internal successors, (7520), 2282 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 7520 transitions. [2022-03-03 19:11:26,598 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 7520 transitions. Word has length 24 [2022-03-03 19:11:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:26,598 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 7520 transitions. [2022-03-03 19:11:26,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 7520 transitions. [2022-03-03 19:11:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:26,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:26,601 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:26,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:26,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-03-03 19:11:26,801 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 746444225, now seen corresponding path program 353 times [2022-03-03 19:11:26,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:26,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135804887] [2022-03-03 19:11:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:26,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:26,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:26,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135804887] [2022-03-03 19:11:26,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135804887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:26,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422136488] [2022-03-03 19:11:26,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:26,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:26,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:26,988 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) [2022-03-03 19:11:26,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-03-03 19:11:27,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:11:27,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:11:27,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:27,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:27,053 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 41 treesize of output 35 [2022-03-03 19:11:27,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:27,203 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 21 treesize of output 17 [2022-03-03 19:11:27,205 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 11 treesize of output 7 [2022-03-03 19:11:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:27,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:27,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:27,727 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 56 treesize of output 54 [2022-03-03 19:11:27,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:27,806 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 56 [2022-03-03 19:11:27,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:27,811 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 47 treesize of output 44 [2022-03-03 19:11:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:27,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422136488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:27,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:27,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:11:27,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279051686] [2022-03-03 19:11:27,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:27,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:11:27,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:27,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:11:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:11:27,877 INFO L87 Difference]: Start difference. First operand 2283 states and 7520 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 19:11:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:28,194 INFO L93 Difference]: Finished difference Result 2775 states and 8980 transitions. [2022-03-03 19:11:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-03-03 19:11:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:28,199 INFO L225 Difference]: With dead ends: 2775 [2022-03-03 19:11:28,199 INFO L226 Difference]: Without dead ends: 2768 [2022-03-03 19:11:28,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:11:28,200 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 80 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:28,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 399 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 479 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-03-03 19:11:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2022-03-03 19:11:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2311. [2022-03-03 19:11:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 3.290909090909091) internal successors, (7602), 2310 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 7602 transitions. [2022-03-03 19:11:28,229 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 7602 transitions. Word has length 24 [2022-03-03 19:11:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:28,230 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 7602 transitions. [2022-03-03 19:11:28,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-03-03 19:11:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 7602 transitions. [2022-03-03 19:11:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:28,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:28,233 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:28,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-03-03 19:11:28,433 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,SelfDestructingSolverStorable368 [2022-03-03 19:11:28,433 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:28,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1214889155, now seen corresponding path program 354 times [2022-03-03 19:11:28,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:28,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465851202] [2022-03-03 19:11:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:28,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:11:28,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:28,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465851202] [2022-03-03 19:11:28,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465851202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:28,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610938069] [2022-03-03 19:11:28,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:28,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:28,608 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) [2022-03-03 19:11:28,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-03-03 19:11:28,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:11:28,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:28,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:11:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:28,690 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 35 [2022-03-03 19:11:28,829 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 39 [2022-03-03 19:11:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:11:28,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:29,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:29,360 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 53 treesize of output 51 [2022-03-03 19:11:29,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:29,447 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 86 treesize of output 78 [2022-03-03 19:11:29,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:29,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 62 [2022-03-03 19:11:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:11:29,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610938069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:29,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:29,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-03 19:11:29,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328999453] [2022-03-03 19:11:29,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:29,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:29,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:29,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:29,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:29,518 INFO L87 Difference]: Start difference. First operand 2311 states and 7602 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2022-03-03 19:11:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:30,710 INFO L93 Difference]: Finished difference Result 3515 states and 10887 transitions. [2022-03-03 19:11:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:11:30,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 24 [2022-03-03 19:11:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:30,716 INFO L225 Difference]: With dead ends: 3515 [2022-03-03 19:11:30,716 INFO L226 Difference]: Without dead ends: 3241 [2022-03-03 19:11:30,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:11:30,716 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 222 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:30,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 353 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:11:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2022-03-03 19:11:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 2052. [2022-03-03 19:11:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.326669917113603) internal successors, (6823), 2051 states have internal predecessors, (6823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6823 transitions. [2022-03-03 19:11:30,756 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6823 transitions. Word has length 24 [2022-03-03 19:11:30,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:30,756 INFO L470 AbstractCegarLoop]: Abstraction has 2052 states and 6823 transitions. [2022-03-03 19:11:30,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2022-03-03 19:11:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6823 transitions. [2022-03-03 19:11:30,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:30,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:30,759 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:30,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:30,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:30,959 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash -755297753, now seen corresponding path program 355 times [2022-03-03 19:11:30,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:30,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317925913] [2022-03-03 19:11:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:30,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:31,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:31,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317925913] [2022-03-03 19:11:31,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317925913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:31,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597976916] [2022-03-03 19:11:31,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:31,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:31,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:31,193 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) [2022-03-03 19:11:31,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-03-03 19:11:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:31,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:11:31,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:31,279 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 35 [2022-03-03 19:11:31,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:31,428 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 43 treesize of output 37 [2022-03-03 19:11:31,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:31,431 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-03 19:11:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:31,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:32,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:32,303 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 48 treesize of output 48 [2022-03-03 19:11:32,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:32,372 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 72 [2022-03-03 19:11:32,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:32,377 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 64 treesize of output 58 [2022-03-03 19:11:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:32,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597976916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:32,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:32,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 19:11:32,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836506918] [2022-03-03 19:11:32,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:32,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:11:32,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:11:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:11:32,419 INFO L87 Difference]: Start difference. First operand 2052 states and 6823 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:33,712 INFO L93 Difference]: Finished difference Result 2623 states and 8353 transitions. [2022-03-03 19:11:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:11:33,712 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) Word has length 24 [2022-03-03 19:11:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:33,716 INFO L225 Difference]: With dead ends: 2623 [2022-03-03 19:11:33,716 INFO L226 Difference]: Without dead ends: 2436 [2022-03-03 19:11:33,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:11:33,716 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 171 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:33,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 326 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 885 Invalid, 0 Unknown, 9 Unchecked, 0.4s Time] [2022-03-03 19:11:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2022-03-03 19:11:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2049. [2022-03-03 19:11:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.330078125) internal successors, (6820), 2048 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6820 transitions. [2022-03-03 19:11:33,742 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6820 transitions. Word has length 24 [2022-03-03 19:11:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:33,742 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 6820 transitions. [2022-03-03 19:11:33,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2022-03-03 19:11:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6820 transitions. [2022-03-03 19:11:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:11:33,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:33,745 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:11:33,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-03-03 19:11:33,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:33,945 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:33,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1391181885, now seen corresponding path program 356 times [2022-03-03 19:11:33,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:33,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144925334] [2022-03-03 19:11:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:33,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:34,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:34,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144925334] [2022-03-03 19:11:34,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144925334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:34,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850064273] [2022-03-03 19:11:34,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:34,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:34,136 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) [2022-03-03 19:11:34,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-03-03 19:11:34,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:11:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:34,218 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 35 [2022-03-03 19:11:34,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:34,471 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 43 treesize of output 37 [2022-03-03 19:11:34,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:11:34,473 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 37 treesize of output 21 [2022-03-03 19:11:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:11:34,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-03-03 19:11:34,958 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-03 19:11:34,960 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 19:11:34,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-03-03 19:11:34,984 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 19:11:34,988 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 19:11:35,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:35,161 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 0ms.. [2022-03-03 19:11:35,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 19:11:35,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 19:11:35,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 19:11:35,164 INFO L732 BasicCegarLoop]: Path program histogram: [356, 6, 4, 3, 3] [2022-03-03 19:11:35,166 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 19:11:35,166 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 19:11:35,167 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 07:11:35 BasicIcfg [2022-03-03 19:11:35,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 19:11:35,167 INFO L158 Benchmark]: Toolchain (without parser) took 767252.79ms. Allocated memory was 197.1MB in the beginning and 374.3MB in the end (delta: 177.2MB). Free memory was 161.8MB in the beginning and 264.1MB in the end (delta: -102.2MB). Peak memory consumption was 75.6MB. Max. memory is 8.0GB. [2022-03-03 19:11:35,167 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 163.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:11:35,167 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.25ms. Allocated memory is still 197.1MB. Free memory was 161.8MB in the beginning and 160.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:11:35,167 INFO L158 Benchmark]: Boogie Preprocessor took 14.65ms. Allocated memory is still 197.1MB. Free memory was 160.2MB in the beginning and 159.3MB in the end (delta: 986.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:11:35,167 INFO L158 Benchmark]: RCFGBuilder took 238.12ms. Allocated memory is still 197.1MB. Free memory was 159.2MB in the beginning and 147.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-03 19:11:35,167 INFO L158 Benchmark]: TraceAbstraction took 766976.67ms. Allocated memory was 197.1MB in the beginning and 374.3MB in the end (delta: 177.2MB). Free memory was 146.5MB in the beginning and 264.1MB in the end (delta: -117.6MB). Peak memory consumption was 61.0MB. Max. memory is 8.0GB. [2022-03-03 19:11:35,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 163.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.25ms. Allocated memory is still 197.1MB. Free memory was 161.8MB in the beginning and 160.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.65ms. Allocated memory is still 197.1MB. Free memory was 160.2MB in the beginning and 159.3MB in the end (delta: 986.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 238.12ms. Allocated memory is still 197.1MB. Free memory was 159.2MB in the beginning and 147.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 766976.67ms. Allocated memory was 197.1MB in the beginning and 374.3MB in the end (delta: 177.2MB). Free memory was 146.5MB in the beginning and 264.1MB in the end (delta: -117.6MB). Peak memory consumption was 61.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 0ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 0ms.. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 0ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 766.9s, OverallIterations: 372, TraceHistogramMax: 5, PathProgramHistogramMax: 356, EmptinessCheckTime: 0.7s, AutomataDifference: 236.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39011 SdHoareTripleChecker+Valid, 106.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39011 mSDsluCounter, 98377 SdHoareTripleChecker+Invalid, 89.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 48308 IncrementalHoareTripleChecker+Unchecked, 184035 mSDsCounter, 7881 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 256199 IncrementalHoareTripleChecker+Invalid, 312388 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7881 mSolverCounterUnsat, 7803 mSDtfsCounter, 256199 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22780 GetRequests, 11329 SyntacticMatches, 1111 SemanticMatches, 10340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76798 ImplicationChecksByTransitivity, 268.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2311occurred in iteration=369, InterpolantAutomatonStates: 5938, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.2s AutomataMinimizationTime, 371 MinimizatonAttempts, 89472 StatesRemovedByMinimization, 368 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 436.5s InterpolantComputationTime, 17324 NumberOfCodeBlocks, 17271 NumberOfCodeBlocksAsserted, 1281 NumberOfCheckSat, 24758 ConstructedInterpolants, 1984 QuantifiedInterpolants, 638307 SizeOfPredicates, 4831 NumberOfNonLiveVariables, 38289 ConjunctsInSsa, 8603 ConjunctsInUnsatCore, 1081 InterpolantComputations, 16 PerfectInterpolantSequences, 8101/18070 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown