/usr/bin/java -Xmx16000000000 -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-opt-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 04:48:18,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 04:48:18,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 04:48:18,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 04:48:18,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 04:48:18,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 04:48:18,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 04:48:18,833 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 [2022-01-18 04:48:18,857 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 04:48:18,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 04:48:18,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 04:48:18,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 04:48:18,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 04:48:18,858 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 04:48:18,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 04:48:18,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 04:48:18,859 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 04:48:18,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 04:48:18,859 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 04:48:18,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 04:48:18,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 04:48:18,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 04:48:18,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 04:48:18,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 04:48:18,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 04:48:18,860 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 04:48:18,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 04:48:18,860 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 04:48:18,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 04:48:18,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 04:48:18,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 04:48:18,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 04:48:18,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 04:48:18,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:48:18,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 04:48:18,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 04:48:18,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 04:48:18,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 04:48:18,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 04:48:18,861 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 04:48:18,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 04:48:18,862 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 04:48:19,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 04:48:19,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 04:48:19,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 04:48:19,060 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 04:48:19,063 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 04:48:19,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl [2022-01-18 04:48:19,064 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl' [2022-01-18 04:48:19,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 04:48:19,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 04:48:19,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 04:48:19,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 04:48:19,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 04:48:19,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,104 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 04:48:19,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 04:48:19,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 04:48:19,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 04:48:19,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 04:48:19,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 04:48:19,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 04:48:19,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 04:48:19,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 04:48:19,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/1) ... [2022-01-18 04:48:19,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:48:19,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:19,168 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) [2022-01-18 04:48:19,170 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 [2022-01-18 04:48:19,192 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 04:48:19,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 04:48:19,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 04:48:19,193 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 04:48:19,193 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 04:48:19,193 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 04:48:19,193 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 04:48:19,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 04:48:19,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 04:48:19,194 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 04:48:19,231 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 04:48:19,232 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 04:48:19,323 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 04:48:19,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 04:48:19,383 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 04:48:19,384 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:48:19 BoogieIcfgContainer [2022-01-18 04:48:19,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 04:48:19,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 04:48:19,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 04:48:19,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 04:48:19,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:48:19" (1/2) ... [2022-01-18 04:48:19,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5289d32 and model type chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:48:19, skipping insertion in model container [2022-01-18 04:48:19,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:48:19" (2/2) ... [2022-01-18 04:48:19,393 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-opt-symm.wvr.bpl [2022-01-18 04:48:19,396 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 04:48:19,396 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 04:48:19,396 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 04:48:19,396 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 04:48:19,446 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 04:48:19,498 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 04:48:19,504 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, 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 [2022-01-18 04:48:19,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 04:48:19,513 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2022-01-18 04:48:19,526 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 04:48:19,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:19,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:19,533 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1091897923, now seen corresponding path program 1 times [2022-01-18 04:48:19,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:19,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298644556] [2022-01-18 04:48:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:19,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:19,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:19,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298644556] [2022-01-18 04:48:19,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298644556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:48:19,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:48:19,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:48:19,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506758391] [2022-01-18 04:48:19,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:48:19,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:48:19,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:48:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:48:19,743 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:19,808 INFO L93 Difference]: Finished difference Result 46 states and 83 transitions. [2022-01-18 04:48:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:48:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 04:48:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:19,815 INFO L225 Difference]: With dead ends: 46 [2022-01-18 04:48:19,815 INFO L226 Difference]: Without dead ends: 44 [2022-01-18 04:48:19,817 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 [2022-01-18 04:48:19,829 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:19,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 15 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-18 04:48:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-01-18 04:48:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2022-01-18 04:48:19,868 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2022-01-18 04:48:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:19,868 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2022-01-18 04:48:19,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2022-01-18 04:48:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 04:48:19,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:19,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:19,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 04:48:19,870 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:19,870 INFO L85 PathProgramCache]: Analyzing trace with hash -28826553, now seen corresponding path program 2 times [2022-01-18 04:48:19,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:19,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202589128] [2022-01-18 04:48:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:19,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:19,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:19,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202589128] [2022-01-18 04:48:19,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202589128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:48:19,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:48:19,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:48:19,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088702229] [2022-01-18 04:48:19,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:48:19,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:48:19,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:48:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:48:19,899 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:19,926 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2022-01-18 04:48:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:48:19,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 04:48:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:19,927 INFO L225 Difference]: With dead ends: 32 [2022-01-18 04:48:19,927 INFO L226 Difference]: Without dead ends: 32 [2022-01-18 04:48:19,927 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 [2022-01-18 04:48:19,928 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:19,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-18 04:48:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-18 04:48:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) [2022-01-18 04:48:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2022-01-18 04:48:19,932 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2022-01-18 04:48:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:19,932 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2022-01-18 04:48:19,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2022-01-18 04:48:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 04:48:19,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:19,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:19,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 04:48:19,933 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:19,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2117344207, now seen corresponding path program 3 times [2022-01-18 04:48:19,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:19,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877569808] [2022-01-18 04:48:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:19,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:19,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:19,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877569808] [2022-01-18 04:48:19,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877569808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:48:19,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:48:19,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:48:19,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994845804] [2022-01-18 04:48:19,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:48:19,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:48:19,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:48:19,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:48:19,977 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:20,004 INFO L93 Difference]: Finished difference Result 54 states and 98 transitions. [2022-01-18 04:48:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:48:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 04:48:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:20,005 INFO L225 Difference]: With dead ends: 54 [2022-01-18 04:48:20,005 INFO L226 Difference]: Without dead ends: 54 [2022-01-18 04:48:20,005 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 [2022-01-18 04:48:20,006 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:20,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-18 04:48:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2022-01-18 04:48:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 66 transitions. [2022-01-18 04:48:20,009 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 66 transitions. Word has length 12 [2022-01-18 04:48:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:20,010 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 66 transitions. [2022-01-18 04:48:20,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 66 transitions. [2022-01-18 04:48:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 04:48:20,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:20,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:20,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 04:48:20,011 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash -101302491, now seen corresponding path program 4 times [2022-01-18 04:48:20,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:20,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596981386] [2022-01-18 04:48:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:20,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:20,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:20,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596981386] [2022-01-18 04:48:20,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596981386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:48:20,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:48:20,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:48:20,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814006283] [2022-01-18 04:48:20,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:48:20,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:48:20,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:48:20,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:48:20,044 INFO L87 Difference]: Start difference. First operand 34 states and 66 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:20,089 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2022-01-18 04:48:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:48:20,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 04:48:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:20,091 INFO L225 Difference]: With dead ends: 39 [2022-01-18 04:48:20,091 INFO L226 Difference]: Without dead ends: 34 [2022-01-18 04:48:20,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:48:20,096 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:20,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 14 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-18 04:48:20,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-18 04:48:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 64 transitions. [2022-01-18 04:48:20,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 64 transitions. Word has length 12 [2022-01-18 04:48:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:20,105 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 64 transitions. [2022-01-18 04:48:20,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 64 transitions. [2022-01-18 04:48:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 04:48:20,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:20,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:20,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 04:48:20,106 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:20,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:20,107 INFO L85 PathProgramCache]: Analyzing trace with hash -71692365, now seen corresponding path program 1 times [2022-01-18 04:48:20,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:20,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748350578] [2022-01-18 04:48:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:20,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:20,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:20,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748350578] [2022-01-18 04:48:20,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748350578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:48:20,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:48:20,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 04:48:20,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56977245] [2022-01-18 04:48:20,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:48:20,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:48:20,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:20,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:48:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:48:20,196 INFO L87 Difference]: Start difference. First operand 34 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:20,257 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2022-01-18 04:48:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 04:48:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 04:48:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:20,258 INFO L225 Difference]: With dead ends: 55 [2022-01-18 04:48:20,258 INFO L226 Difference]: Without dead ends: 53 [2022-01-18 04:48:20,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:48:20,262 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:20,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-18 04:48:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2022-01-18 04:48:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 66 transitions. [2022-01-18 04:48:20,270 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 66 transitions. Word has length 13 [2022-01-18 04:48:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:20,270 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 66 transitions. [2022-01-18 04:48:20,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 66 transitions. [2022-01-18 04:48:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 04:48:20,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:20,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:20,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 04:48:20,271 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2007601463, now seen corresponding path program 2 times [2022-01-18 04:48:20,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:20,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050654023] [2022-01-18 04:48:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:20,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:20,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050654023] [2022-01-18 04:48:20,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050654023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:48:20,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:48:20,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 04:48:20,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472214193] [2022-01-18 04:48:20,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:48:20,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:48:20,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:48:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:48:20,355 INFO L87 Difference]: Start difference. First operand 35 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:20,426 INFO L93 Difference]: Finished difference Result 57 states and 107 transitions. [2022-01-18 04:48:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 04:48:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 04:48:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:20,428 INFO L225 Difference]: With dead ends: 57 [2022-01-18 04:48:20,428 INFO L226 Difference]: Without dead ends: 57 [2022-01-18 04:48:20,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:48:20,429 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:20,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-18 04:48:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2022-01-18 04:48:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-01-18 04:48:20,432 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-01-18 04:48:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:20,432 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-01-18 04:48:20,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-01-18 04:48:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 04:48:20,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:20,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:20,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 04:48:20,433 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:20,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2035091755, now seen corresponding path program 3 times [2022-01-18 04:48:20,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:20,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814241403] [2022-01-18 04:48:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:20,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:20,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814241403] [2022-01-18 04:48:20,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814241403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:48:20,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:48:20,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 04:48:20,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482094676] [2022-01-18 04:48:20,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:48:20,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:48:20,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:48:20,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:48:20,485 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:20,529 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2022-01-18 04:48:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 04:48:20,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 04:48:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:20,530 INFO L225 Difference]: With dead ends: 42 [2022-01-18 04:48:20,530 INFO L226 Difference]: Without dead ends: 40 [2022-01-18 04:48:20,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-18 04:48:20,531 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:20,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-18 04:48:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-18 04:48:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2022-01-18 04:48:20,533 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2022-01-18 04:48:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:20,533 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2022-01-18 04:48:20,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2022-01-18 04:48:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 04:48:20,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:20,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:20,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 04:48:20,534 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash -180581713, now seen corresponding path program 4 times [2022-01-18 04:48:20,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:20,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197828815] [2022-01-18 04:48:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:20,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:20,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:20,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197828815] [2022-01-18 04:48:20,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197828815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:48:20,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:48:20,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 04:48:20,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459552329] [2022-01-18 04:48:20,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:48:20,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:48:20,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:48:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:48:20,577 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:20,635 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2022-01-18 04:48:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 04:48:20,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 04:48:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:20,636 INFO L225 Difference]: With dead ends: 44 [2022-01-18 04:48:20,636 INFO L226 Difference]: Without dead ends: 44 [2022-01-18 04:48:20,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 04:48:20,637 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:20,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-18 04:48:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-01-18 04:48:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-01-18 04:48:20,647 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-01-18 04:48:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:20,647 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-01-18 04:48:20,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-01-18 04:48:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 04:48:20,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:20,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:20,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 04:48:20,648 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash 892503667, now seen corresponding path program 5 times [2022-01-18 04:48:20,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:20,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065372342] [2022-01-18 04:48:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:20,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:20,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:20,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065372342] [2022-01-18 04:48:20,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065372342] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:48:20,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:48:20,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 04:48:20,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491394785] [2022-01-18 04:48:20,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:48:20,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:48:20,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:48:20,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:48:20,703 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:20,745 INFO L93 Difference]: Finished difference Result 48 states and 92 transitions. [2022-01-18 04:48:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 04:48:20,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 04:48:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:20,746 INFO L225 Difference]: With dead ends: 48 [2022-01-18 04:48:20,746 INFO L226 Difference]: Without dead ends: 48 [2022-01-18 04:48:20,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:48:20,747 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:20,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-18 04:48:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-01-18 04:48:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-01-18 04:48:20,749 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-01-18 04:48:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:20,749 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-01-18 04:48:20,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:20,749 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-01-18 04:48:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:48:20,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:20,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:20,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 04:48:20,750 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1512007823, now seen corresponding path program 1 times [2022-01-18 04:48:20,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:20,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544920863] [2022-01-18 04:48:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:20,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:21,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:21,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544920863] [2022-01-18 04:48:21,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544920863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:21,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705919449] [2022-01-18 04:48:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:21,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:21,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:21,064 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) [2022-01-18 04:48:21,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 04:48:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:21,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:48:21,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:21,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:48:21,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:48:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:21,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:21,969 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:21,970 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 118 treesize of output 101 [2022-01-18 04:48:21,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 04:48:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:22,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705919449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:22,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:22,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 04:48:22,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078502485] [2022-01-18 04:48:22,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:22,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:48:22,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:22,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:48:22,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:48:22,082 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:22,476 INFO L93 Difference]: Finished difference Result 71 states and 127 transitions. [2022-01-18 04:48:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:48:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:48:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:22,477 INFO L225 Difference]: With dead ends: 71 [2022-01-18 04:48:22,477 INFO L226 Difference]: Without dead ends: 58 [2022-01-18 04:48:22,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:48:22,478 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:22,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 78 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:22,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-18 04:48:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2022-01-18 04:48:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2022-01-18 04:48:22,480 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2022-01-18 04:48:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:22,480 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2022-01-18 04:48:22,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2022-01-18 04:48:22,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:48:22,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:22,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:22,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:22,687 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,SelfDestructingSolverStorable9 [2022-01-18 04:48:22,688 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:22,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1129287435, now seen corresponding path program 2 times [2022-01-18 04:48:22,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:22,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801956636] [2022-01-18 04:48:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:22,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:23,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801956636] [2022-01-18 04:48:23,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801956636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980591912] [2022-01-18 04:48:23,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:48:23,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:23,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:23,135 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) [2022-01-18 04:48:23,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 04:48:23,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:48:23,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:48:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:23,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:48:23,403 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 59 treesize of output 47 [2022-01-18 04:48:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:23,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:23,852 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:23,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 83 [2022-01-18 04:48:23,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:48:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:23,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980591912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:23,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:23,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 04:48:23,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883115873] [2022-01-18 04:48:23,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:23,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:48:23,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:48:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:48:23,934 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:25,520 INFO L93 Difference]: Finished difference Result 151 states and 266 transitions. [2022-01-18 04:48:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:48:25,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:48:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:25,521 INFO L225 Difference]: With dead ends: 151 [2022-01-18 04:48:25,521 INFO L226 Difference]: Without dead ends: 112 [2022-01-18 04:48:25,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:48:25,522 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:25,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 154 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:48:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-18 04:48:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 46. [2022-01-18 04:48:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 91 transitions. [2022-01-18 04:48:25,524 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 91 transitions. Word has length 14 [2022-01-18 04:48:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:25,524 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 91 transitions. [2022-01-18 04:48:25,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 91 transitions. [2022-01-18 04:48:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:48:25,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:25,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:25,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:25,741 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,SelfDestructingSolverStorable10 [2022-01-18 04:48:25,741 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2141979967, now seen corresponding path program 3 times [2022-01-18 04:48:25,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:25,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282240758] [2022-01-18 04:48:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:25,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:25,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:25,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282240758] [2022-01-18 04:48:25,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282240758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:25,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30999749] [2022-01-18 04:48:25,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:48:25,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:25,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:25,925 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) [2022-01-18 04:48:25,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 04:48:25,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:48:25,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:25,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:48:25,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:26,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-01-18 04:48:26,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:48:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:26,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:26,751 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:26,751 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 121 treesize of output 104 [2022-01-18 04:48:26,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 04:48:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:26,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30999749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:26,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:26,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 04:48:26,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336927036] [2022-01-18 04:48:26,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:26,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:48:26,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:48:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:48:26,836 INFO L87 Difference]: Start difference. First operand 46 states and 91 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:27,249 INFO L93 Difference]: Finished difference Result 78 states and 146 transitions. [2022-01-18 04:48:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:48:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:48:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:27,250 INFO L225 Difference]: With dead ends: 78 [2022-01-18 04:48:27,250 INFO L226 Difference]: Without dead ends: 60 [2022-01-18 04:48:27,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:48:27,251 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:27,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 110 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:48:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-18 04:48:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2022-01-18 04:48:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2022-01-18 04:48:27,253 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2022-01-18 04:48:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:27,253 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2022-01-18 04:48:27,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2022-01-18 04:48:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:48:27,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:27,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:27,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:27,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:27,471 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:27,471 INFO L85 PathProgramCache]: Analyzing trace with hash -73693501, now seen corresponding path program 4 times [2022-01-18 04:48:27,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:27,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753456964] [2022-01-18 04:48:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:27,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:27,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:27,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753456964] [2022-01-18 04:48:27,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753456964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:27,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927811045] [2022-01-18 04:48:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:48:27,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:27,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:27,602 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) [2022-01-18 04:48:27,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 04:48:27,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:48:27,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:48:27,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:27,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:48:27,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:48:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:28,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:28,515 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:28,515 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 115 treesize of output 100 [2022-01-18 04:48:28,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 79 [2022-01-18 04:48:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:28,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927811045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:28,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:28,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 04:48:28,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144088848] [2022-01-18 04:48:28,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:28,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:48:28,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:48:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:48:28,628 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:29,416 INFO L93 Difference]: Finished difference Result 156 states and 265 transitions. [2022-01-18 04:48:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:48:29,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:48:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:29,417 INFO L225 Difference]: With dead ends: 156 [2022-01-18 04:48:29,417 INFO L226 Difference]: Without dead ends: 116 [2022-01-18 04:48:29,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:48:29,417 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:29,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 185 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:48:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-18 04:48:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 53. [2022-01-18 04:48:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 112 transitions. [2022-01-18 04:48:29,420 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 112 transitions. Word has length 14 [2022-01-18 04:48:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:29,420 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 112 transitions. [2022-01-18 04:48:29,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 112 transitions. [2022-01-18 04:48:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:48:29,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:29,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:29,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:29,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:29,631 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2072477259, now seen corresponding path program 5 times [2022-01-18 04:48:29,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289604535] [2022-01-18 04:48:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:29,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:29,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289604535] [2022-01-18 04:48:29,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289604535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964183762] [2022-01-18 04:48:29,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:48:29,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:29,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:29,758 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) [2022-01-18 04:48:29,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 04:48:29,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:48:29,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:29,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:48:29,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:29,919 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 99 treesize of output 83 [2022-01-18 04:48:29,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:48:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:30,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:30,534 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:30,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 91 [2022-01-18 04:48:30,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-01-18 04:48:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:30,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964183762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:30,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:30,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 04:48:30,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867646539] [2022-01-18 04:48:30,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:30,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:48:30,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:30,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:48:30,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:48:30,635 INFO L87 Difference]: Start difference. First operand 53 states and 112 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:31,270 INFO L93 Difference]: Finished difference Result 143 states and 270 transitions. [2022-01-18 04:48:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:48:31,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:48:31,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:31,271 INFO L225 Difference]: With dead ends: 143 [2022-01-18 04:48:31,271 INFO L226 Difference]: Without dead ends: 108 [2022-01-18 04:48:31,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:48:31,272 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:31,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 96 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:48:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-18 04:48:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 60. [2022-01-18 04:48:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 129 transitions. [2022-01-18 04:48:31,274 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 129 transitions. Word has length 14 [2022-01-18 04:48:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:31,274 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 129 transitions. [2022-01-18 04:48:31,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 129 transitions. [2022-01-18 04:48:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:48:31,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:31,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:31,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 04:48:31,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 04:48:31,491 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:31,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:31,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1267189049, now seen corresponding path program 6 times [2022-01-18 04:48:31,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:31,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908182911] [2022-01-18 04:48:31,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:31,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:31,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:31,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908182911] [2022-01-18 04:48:31,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908182911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:31,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338836851] [2022-01-18 04:48:31,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:48:31,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:31,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:31,686 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) [2022-01-18 04:48:31,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 04:48:31,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:48:31,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:31,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:48:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:31,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 04:48:31,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 04:48:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:32,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:32,313 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:32,313 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 121 treesize of output 104 [2022-01-18 04:48:32,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 04:48:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:32,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338836851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:32,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:32,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 04:48:32,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146313225] [2022-01-18 04:48:32,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:32,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:48:32,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:48:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:48:32,421 INFO L87 Difference]: Start difference. First operand 60 states and 129 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:33,205 INFO L93 Difference]: Finished difference Result 146 states and 261 transitions. [2022-01-18 04:48:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:48:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:48:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:33,205 INFO L225 Difference]: With dead ends: 146 [2022-01-18 04:48:33,206 INFO L226 Difference]: Without dead ends: 121 [2022-01-18 04:48:33,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:48:33,206 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 83 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:33,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 122 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:48:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-18 04:48:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 64. [2022-01-18 04:48:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.2222222222222223) internal successors, (140), 63 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 140 transitions. [2022-01-18 04:48:33,208 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 140 transitions. Word has length 14 [2022-01-18 04:48:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:33,209 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 140 transitions. [2022-01-18 04:48:33,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 140 transitions. [2022-01-18 04:48:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:48:33,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:33,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:33,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:33,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 04:48:33,426 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:33,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:33,426 INFO L85 PathProgramCache]: Analyzing trace with hash 812104779, now seen corresponding path program 7 times [2022-01-18 04:48:33,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:33,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725279932] [2022-01-18 04:48:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:33,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:33,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725279932] [2022-01-18 04:48:33,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725279932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860077482] [2022-01-18 04:48:33,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:48:33,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:33,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:33,536 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) [2022-01-18 04:48:33,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 04:48:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:33,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:48:33,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:33,693 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 99 treesize of output 83 [2022-01-18 04:48:33,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:48:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:34,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:34,502 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:34,502 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 119 treesize of output 102 [2022-01-18 04:48:34,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 04:48:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:34,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860077482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:34,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:34,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 04:48:34,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934372416] [2022-01-18 04:48:34,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:34,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:48:34,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:34,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:48:34,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:48:34,606 INFO L87 Difference]: Start difference. First operand 64 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:35,034 INFO L93 Difference]: Finished difference Result 133 states and 253 transitions. [2022-01-18 04:48:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:48:35,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:48:35,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:35,035 INFO L225 Difference]: With dead ends: 133 [2022-01-18 04:48:35,035 INFO L226 Difference]: Without dead ends: 107 [2022-01-18 04:48:35,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:48:35,035 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:35,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 95 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-18 04:48:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 63. [2022-01-18 04:48:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 62 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 137 transitions. [2022-01-18 04:48:35,038 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 137 transitions. Word has length 14 [2022-01-18 04:48:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:35,038 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 137 transitions. [2022-01-18 04:48:35,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 137 transitions. [2022-01-18 04:48:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:48:35,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:35,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:35,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:35,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:35,240 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1336691757, now seen corresponding path program 8 times [2022-01-18 04:48:35,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:35,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268973809] [2022-01-18 04:48:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:35,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:35,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268973809] [2022-01-18 04:48:35,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268973809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884443112] [2022-01-18 04:48:35,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:48:35,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:35,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:35,351 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) [2022-01-18 04:48:35,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 04:48:35,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:48:35,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:48:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:35,533 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 101 treesize of output 85 [2022-01-18 04:48:35,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:48:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:35,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:36,151 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:36,151 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 102 treesize of output 89 [2022-01-18 04:48:36,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-01-18 04:48:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884443112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:36,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:36,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 04:48:36,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120496410] [2022-01-18 04:48:36,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:36,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:48:36,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:48:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:48:36,234 INFO L87 Difference]: Start difference. First operand 63 states and 137 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:36,900 INFO L93 Difference]: Finished difference Result 164 states and 311 transitions. [2022-01-18 04:48:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:48:36,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:48:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:36,901 INFO L225 Difference]: With dead ends: 164 [2022-01-18 04:48:36,901 INFO L226 Difference]: Without dead ends: 131 [2022-01-18 04:48:36,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:48:36,901 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 133 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:36,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 129 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:48:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-18 04:48:36,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 67. [2022-01-18 04:48:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.257575757575758) internal successors, (149), 66 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 149 transitions. [2022-01-18 04:48:36,904 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 149 transitions. Word has length 14 [2022-01-18 04:48:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:36,904 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 149 transitions. [2022-01-18 04:48:36,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 149 transitions. [2022-01-18 04:48:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:48:36,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:36,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:36,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:37,119 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,SelfDestructingSolverStorable16 [2022-01-18 04:48:37,119 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1864183951, now seen corresponding path program 9 times [2022-01-18 04:48:37,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:37,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917377104] [2022-01-18 04:48:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:37,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:37,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917377104] [2022-01-18 04:48:37,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917377104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746957904] [2022-01-18 04:48:37,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:48:37,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:37,276 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) [2022-01-18 04:48:37,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 04:48:37,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:48:37,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:37,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:48:37,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:37,460 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 99 treesize of output 83 [2022-01-18 04:48:37,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:48:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:37,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:38,002 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:38,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2022-01-18 04:48:38,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2022-01-18 04:48:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:38,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746957904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:38,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:38,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 04:48:38,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375512034] [2022-01-18 04:48:38,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:38,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:48:38,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:48:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:48:38,088 INFO L87 Difference]: Start difference. First operand 67 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:39,097 INFO L93 Difference]: Finished difference Result 169 states and 324 transitions. [2022-01-18 04:48:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:48:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:48:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:39,099 INFO L225 Difference]: With dead ends: 169 [2022-01-18 04:48:39,099 INFO L226 Difference]: Without dead ends: 140 [2022-01-18 04:48:39,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:48:39,099 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 156 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:39,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 143 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:48:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-18 04:48:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 76. [2022-01-18 04:48:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.24) internal successors, (168), 75 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 168 transitions. [2022-01-18 04:48:39,102 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 168 transitions. Word has length 14 [2022-01-18 04:48:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:39,102 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 168 transitions. [2022-01-18 04:48:39,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 168 transitions. [2022-01-18 04:48:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:39,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:39,103 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:39,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:39,307 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,SelfDestructingSolverStorable17 [2022-01-18 04:48:39,307 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash 87675959, now seen corresponding path program 10 times [2022-01-18 04:48:39,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:39,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007320188] [2022-01-18 04:48:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:39,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:39,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007320188] [2022-01-18 04:48:39,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007320188] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7975517] [2022-01-18 04:48:39,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:48:39,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:39,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:39,374 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) [2022-01-18 04:48:39,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 04:48:39,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:48:39,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:39,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:39,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:39,585 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:39,586 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 30 treesize of output 25 [2022-01-18 04:48:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:39,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7975517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:39,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:39,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 04:48:39,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400052451] [2022-01-18 04:48:39,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:39,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 04:48:39,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:39,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 04:48:39,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 04:48:39,591 INFO L87 Difference]: Start difference. First operand 76 states and 168 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:39,693 INFO L93 Difference]: Finished difference Result 114 states and 239 transitions. [2022-01-18 04:48:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:48:39,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:39,694 INFO L225 Difference]: With dead ends: 114 [2022-01-18 04:48:39,694 INFO L226 Difference]: Without dead ends: 114 [2022-01-18 04:48:39,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:48:39,694 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:39,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 79 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-18 04:48:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2022-01-18 04:48:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.24) internal successors, (168), 75 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 168 transitions. [2022-01-18 04:48:39,697 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 168 transitions. Word has length 15 [2022-01-18 04:48:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:39,697 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 168 transitions. [2022-01-18 04:48:39,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 168 transitions. [2022-01-18 04:48:39,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:39,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:39,697 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:39,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:39,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:39,915 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:39,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1498025365, now seen corresponding path program 11 times [2022-01-18 04:48:39,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:39,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771669802] [2022-01-18 04:48:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:39,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:39,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771669802] [2022-01-18 04:48:39,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771669802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372241568] [2022-01-18 04:48:39,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:48:39,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:39,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:39,988 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) [2022-01-18 04:48:39,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 04:48:40,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:48:40,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:40,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:40,272 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:40,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-01-18 04:48:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:40,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372241568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:40,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:40,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 04:48:40,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416504024] [2022-01-18 04:48:40,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:40,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:48:40,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:48:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:48:40,278 INFO L87 Difference]: Start difference. First operand 76 states and 168 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:40,400 INFO L93 Difference]: Finished difference Result 117 states and 245 transitions. [2022-01-18 04:48:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:48:40,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:40,401 INFO L225 Difference]: With dead ends: 117 [2022-01-18 04:48:40,401 INFO L226 Difference]: Without dead ends: 117 [2022-01-18 04:48:40,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:48:40,402 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:40,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 96 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-18 04:48:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2022-01-18 04:48:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.22972972972973) internal successors, (165), 74 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2022-01-18 04:48:40,404 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 15 [2022-01-18 04:48:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:40,404 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2022-01-18 04:48:40,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2022-01-18 04:48:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:40,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:40,405 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:40,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:40,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:40,615 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:40,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash 648145395, now seen corresponding path program 12 times [2022-01-18 04:48:40,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:40,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091449983] [2022-01-18 04:48:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:40,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:40,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:40,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091449983] [2022-01-18 04:48:40,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091449983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:40,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148031662] [2022-01-18 04:48:40,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:48:40,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:40,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:40,672 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) [2022-01-18 04:48:40,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 04:48:40,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:48:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:40,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:40,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:48:40,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:48:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:40,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:40,984 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:40,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-01-18 04:48:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:40,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148031662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:40,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:40,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 04:48:40,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862843696] [2022-01-18 04:48:40,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:40,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:48:40,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:40,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:48:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:48:40,989 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:41,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:41,236 INFO L93 Difference]: Finished difference Result 140 states and 277 transitions. [2022-01-18 04:48:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:48:41,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:41,236 INFO L225 Difference]: With dead ends: 140 [2022-01-18 04:48:41,237 INFO L226 Difference]: Without dead ends: 140 [2022-01-18 04:48:41,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:48:41,237 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:41,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 79 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-18 04:48:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 75. [2022-01-18 04:48:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.22972972972973) internal successors, (165), 74 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2022-01-18 04:48:41,239 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 15 [2022-01-18 04:48:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:41,240 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2022-01-18 04:48:41,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2022-01-18 04:48:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:41,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:41,240 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:41,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:41,443 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,SelfDestructingSolverStorable20 [2022-01-18 04:48:41,443 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1235060997, now seen corresponding path program 13 times [2022-01-18 04:48:41,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:41,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714910622] [2022-01-18 04:48:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:41,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:41,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:41,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714910622] [2022-01-18 04:48:41,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714910622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:41,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395814207] [2022-01-18 04:48:41,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:48:41,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:41,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:41,504 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) [2022-01-18 04:48:41,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 04:48:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:41,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:41,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:41,622 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 87 treesize of output 71 [2022-01-18 04:48:41,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:48:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:41,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:41,829 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:41,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-01-18 04:48:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:41,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395814207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:41,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:41,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-18 04:48:41,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804702647] [2022-01-18 04:48:41,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:41,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:48:41,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:41,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:48:41,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:48:41,834 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:41,990 INFO L93 Difference]: Finished difference Result 110 states and 226 transitions. [2022-01-18 04:48:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:48:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:41,990 INFO L225 Difference]: With dead ends: 110 [2022-01-18 04:48:41,991 INFO L226 Difference]: Without dead ends: 107 [2022-01-18 04:48:41,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:48:41,991 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:41,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-18 04:48:41,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2022-01-18 04:48:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 74 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 164 transitions. [2022-01-18 04:48:41,993 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 164 transitions. Word has length 15 [2022-01-18 04:48:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:41,993 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 164 transitions. [2022-01-18 04:48:41,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 164 transitions. [2022-01-18 04:48:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:41,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:41,994 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:42,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-18 04:48:42,210 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,SelfDestructingSolverStorable21 [2022-01-18 04:48:42,210 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:42,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash -711971345, now seen corresponding path program 14 times [2022-01-18 04:48:42,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:42,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176013517] [2022-01-18 04:48:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:42,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:42,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:42,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176013517] [2022-01-18 04:48:42,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176013517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:42,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385207281] [2022-01-18 04:48:42,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:48:42,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:42,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:42,287 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) [2022-01-18 04:48:42,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 04:48:42,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:48:42,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:42,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:42,437 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 96 treesize of output 80 [2022-01-18 04:48:42,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:48:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:42,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:42,607 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:42,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2022-01-18 04:48:42,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 04:48:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:42,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385207281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:42,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:42,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:48:42,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081234258] [2022-01-18 04:48:42,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:42,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:48:42,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:48:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:42,639 INFO L87 Difference]: Start difference. First operand 75 states and 164 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:42,903 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2022-01-18 04:48:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:48:42,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:42,904 INFO L225 Difference]: With dead ends: 119 [2022-01-18 04:48:42,904 INFO L226 Difference]: Without dead ends: 119 [2022-01-18 04:48:42,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:48:42,905 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:42,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 56 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-18 04:48:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2022-01-18 04:48:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 74 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 164 transitions. [2022-01-18 04:48:42,907 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 164 transitions. Word has length 15 [2022-01-18 04:48:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:42,907 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 164 transitions. [2022-01-18 04:48:42,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 164 transitions. [2022-01-18 04:48:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:42,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:42,907 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:42,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:43,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:43,124 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash -153867149, now seen corresponding path program 15 times [2022-01-18 04:48:43,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:43,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780258430] [2022-01-18 04:48:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:43,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:43,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:43,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780258430] [2022-01-18 04:48:43,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780258430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507460561] [2022-01-18 04:48:43,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:48:43,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:43,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:43,202 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) [2022-01-18 04:48:43,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 04:48:43,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:48:43,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:43,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:43,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:43,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:43,445 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 34 treesize of output 34 [2022-01-18 04:48:43,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:43,451 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 26 treesize of output 26 [2022-01-18 04:48:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:43,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507460561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:43,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:43,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:48:43,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870159215] [2022-01-18 04:48:43,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:43,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:48:43,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:43,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:48:43,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:43,493 INFO L87 Difference]: Start difference. First operand 75 states and 164 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:43,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:43,564 INFO L93 Difference]: Finished difference Result 91 states and 196 transitions. [2022-01-18 04:48:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:48:43,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:43,565 INFO L225 Difference]: With dead ends: 91 [2022-01-18 04:48:43,565 INFO L226 Difference]: Without dead ends: 91 [2022-01-18 04:48:43,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:43,565 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:43,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-18 04:48:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2022-01-18 04:48:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 74 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 164 transitions. [2022-01-18 04:48:43,567 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 164 transitions. Word has length 15 [2022-01-18 04:48:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:43,567 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 164 transitions. [2022-01-18 04:48:43,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 164 transitions. [2022-01-18 04:48:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:43,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:43,568 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:43,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:43,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:43,779 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash 632186871, now seen corresponding path program 16 times [2022-01-18 04:48:43,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:43,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864471006] [2022-01-18 04:48:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:43,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:43,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864471006] [2022-01-18 04:48:43,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864471006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401510045] [2022-01-18 04:48:43,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:48:43,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:43,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:43,835 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) [2022-01-18 04:48:43,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 04:48:43,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:48:43,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:43,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:43,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:48:43,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:48:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:44,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:44,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:44,108 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 65 treesize of output 61 [2022-01-18 04:48:44,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:44,116 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 53 treesize of output 49 [2022-01-18 04:48:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:44,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401510045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:44,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:44,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:48:44,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996776923] [2022-01-18 04:48:44,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:44,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:48:44,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:48:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:44,227 INFO L87 Difference]: Start difference. First operand 75 states and 164 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:44,289 INFO L93 Difference]: Finished difference Result 84 states and 182 transitions. [2022-01-18 04:48:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:48:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:44,290 INFO L225 Difference]: With dead ends: 84 [2022-01-18 04:48:44,290 INFO L226 Difference]: Without dead ends: 84 [2022-01-18 04:48:44,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:44,290 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:44,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 30 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:44,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-18 04:48:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2022-01-18 04:48:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.191780821917808) internal successors, (160), 73 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2022-01-18 04:48:44,292 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 15 [2022-01-18 04:48:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:44,292 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2022-01-18 04:48:44,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2022-01-18 04:48:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:44,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:44,293 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:44,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:44,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-18 04:48:44,494 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash -195879565, now seen corresponding path program 17 times [2022-01-18 04:48:44,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:44,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855660284] [2022-01-18 04:48:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:44,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:44,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:44,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855660284] [2022-01-18 04:48:44,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855660284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:44,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774427667] [2022-01-18 04:48:44,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:48:44,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:44,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:44,555 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) [2022-01-18 04:48:44,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 04:48:44,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:48:44,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:44,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:44,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:44,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:48:44,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:48:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:44,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:44,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:44,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 59 [2022-01-18 04:48:44,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:44,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2022-01-18 04:48:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:44,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774427667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:44,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:44,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:48:44,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061465570] [2022-01-18 04:48:44,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:44,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:48:44,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:48:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:44,943 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:45,051 INFO L93 Difference]: Finished difference Result 102 states and 207 transitions. [2022-01-18 04:48:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 04:48:45,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:45,056 INFO L225 Difference]: With dead ends: 102 [2022-01-18 04:48:45,056 INFO L226 Difference]: Without dead ends: 102 [2022-01-18 04:48:45,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:48:45,057 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:45,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-18 04:48:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2022-01-18 04:48:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 156 transitions. [2022-01-18 04:48:45,059 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 156 transitions. Word has length 15 [2022-01-18 04:48:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:45,059 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 156 transitions. [2022-01-18 04:48:45,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 156 transitions. [2022-01-18 04:48:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:45,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:45,060 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:45,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-18 04:48:45,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 04:48:45,278 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:45,278 INFO L85 PathProgramCache]: Analyzing trace with hash 910805043, now seen corresponding path program 18 times [2022-01-18 04:48:45,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:45,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043944368] [2022-01-18 04:48:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:45,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:45,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:45,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043944368] [2022-01-18 04:48:45,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043944368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:45,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439192057] [2022-01-18 04:48:45,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:48:45,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:45,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:45,349 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) [2022-01-18 04:48:45,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 04:48:45,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:48:45,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:45,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 04:48:45,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 37 [2022-01-18 04:48:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:45,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:45,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:45,592 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 63 treesize of output 59 [2022-01-18 04:48:45,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:45,599 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 51 treesize of output 47 [2022-01-18 04:48:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:45,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439192057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:45,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:45,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-18 04:48:45,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641771957] [2022-01-18 04:48:45,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:45,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:48:45,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:45,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:48:45,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:48:45,710 INFO L87 Difference]: Start difference. First operand 73 states and 156 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:45,819 INFO L93 Difference]: Finished difference Result 86 states and 177 transitions. [2022-01-18 04:48:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 04:48:45,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:45,819 INFO L225 Difference]: With dead ends: 86 [2022-01-18 04:48:45,819 INFO L226 Difference]: Without dead ends: 80 [2022-01-18 04:48:45,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:45,820 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:45,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-18 04:48:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-01-18 04:48:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 72 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 155 transitions. [2022-01-18 04:48:45,822 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 155 transitions. Word has length 15 [2022-01-18 04:48:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:45,822 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 155 transitions. [2022-01-18 04:48:45,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 155 transitions. [2022-01-18 04:48:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:45,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:45,822 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:45,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:46,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 04:48:46,038 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1536075755, now seen corresponding path program 19 times [2022-01-18 04:48:46,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:46,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386070637] [2022-01-18 04:48:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:46,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:46,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:46,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386070637] [2022-01-18 04:48:46,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386070637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191737049] [2022-01-18 04:48:46,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:48:46,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:46,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:46,096 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) [2022-01-18 04:48:46,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 04:48:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:46,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:46,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:46,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:46,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:46,352 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 34 treesize of output 34 [2022-01-18 04:48:46,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:46,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 04:48:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:46,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191737049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:46,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:46,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:48:46,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021046715] [2022-01-18 04:48:46,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:46,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:48:46,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:46,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:48:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:46,408 INFO L87 Difference]: Start difference. First operand 73 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:46,478 INFO L93 Difference]: Finished difference Result 86 states and 179 transitions. [2022-01-18 04:48:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:48:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:46,478 INFO L225 Difference]: With dead ends: 86 [2022-01-18 04:48:46,478 INFO L226 Difference]: Without dead ends: 86 [2022-01-18 04:48:46,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:46,479 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:46,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 45 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-18 04:48:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2022-01-18 04:48:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2022-01-18 04:48:46,483 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2022-01-18 04:48:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:46,483 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2022-01-18 04:48:46,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2022-01-18 04:48:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:46,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:46,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:46,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:46,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:46,699 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash -612720781, now seen corresponding path program 20 times [2022-01-18 04:48:46,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:46,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939465596] [2022-01-18 04:48:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:46,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:46,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939465596] [2022-01-18 04:48:46,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939465596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32047802] [2022-01-18 04:48:46,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:48:46,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:46,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:46,765 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) [2022-01-18 04:48:46,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 04:48:46,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:48:46,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:46,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:48:46,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:48:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:46,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:47,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:47,059 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-01-18 04:48:47,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:47,064 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 26 treesize of output 26 [2022-01-18 04:48:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:47,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32047802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:47,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:47,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:48:47,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383271517] [2022-01-18 04:48:47,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:47,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:48:47,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:48:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:47,109 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:47,189 INFO L93 Difference]: Finished difference Result 87 states and 182 transitions. [2022-01-18 04:48:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:48:47,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:47,190 INFO L225 Difference]: With dead ends: 87 [2022-01-18 04:48:47,190 INFO L226 Difference]: Without dead ends: 87 [2022-01-18 04:48:47,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:48:47,191 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:47,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-18 04:48:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2022-01-18 04:48:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2022-01-18 04:48:47,192 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2022-01-18 04:48:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:47,192 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2022-01-18 04:48:47,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2022-01-18 04:48:47,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:47,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:47,193 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:47,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:47,393 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,SelfDestructingSolverStorable28 [2022-01-18 04:48:47,393 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:47,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash 133946599, now seen corresponding path program 21 times [2022-01-18 04:48:47,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:47,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302140861] [2022-01-18 04:48:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:47,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:47,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302140861] [2022-01-18 04:48:47,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302140861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974508325] [2022-01-18 04:48:47,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:48:47,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:47,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:47,472 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) [2022-01-18 04:48:47,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 04:48:47,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:48:47,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:47,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:47,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:48:47,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:48:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:47,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:47,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:47,806 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 34 treesize of output 34 [2022-01-18 04:48:47,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:47,811 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 26 treesize of output 26 [2022-01-18 04:48:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:47,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974508325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:47,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:47,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:48:47,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255297771] [2022-01-18 04:48:47,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:47,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:48:47,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:48:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:47,859 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:48,020 INFO L93 Difference]: Finished difference Result 129 states and 248 transitions. [2022-01-18 04:48:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:48:48,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:48,021 INFO L225 Difference]: With dead ends: 129 [2022-01-18 04:48:48,021 INFO L226 Difference]: Without dead ends: 129 [2022-01-18 04:48:48,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:48:48,022 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:48,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 103 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-18 04:48:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 75. [2022-01-18 04:48:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 163 transitions. [2022-01-18 04:48:48,024 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 163 transitions. Word has length 15 [2022-01-18 04:48:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:48,024 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 163 transitions. [2022-01-18 04:48:48,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 163 transitions. [2022-01-18 04:48:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:48,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:48,024 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:48,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 04:48:48,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:48,235 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:48,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1694219349, now seen corresponding path program 22 times [2022-01-18 04:48:48,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:48,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059619092] [2022-01-18 04:48:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:48,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:48,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:48,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059619092] [2022-01-18 04:48:48,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059619092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:48,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117865860] [2022-01-18 04:48:48,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:48:48,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:48,295 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) [2022-01-18 04:48:48,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 04:48:48,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:48:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:48,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 04:48:48,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 04:48:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:48,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:48,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:48,511 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 63 treesize of output 59 [2022-01-18 04:48:48,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:48,517 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 51 treesize of output 47 [2022-01-18 04:48:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:48,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117865860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:48,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:48,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-18 04:48:48,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801067235] [2022-01-18 04:48:48,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:48,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:48:48,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:48:48,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:48:48,616 INFO L87 Difference]: Start difference. First operand 75 states and 163 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:48,732 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2022-01-18 04:48:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:48:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:48,733 INFO L225 Difference]: With dead ends: 116 [2022-01-18 04:48:48,733 INFO L226 Difference]: Without dead ends: 110 [2022-01-18 04:48:48,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:48,734 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:48,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 49 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-18 04:48:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2022-01-18 04:48:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.211764705882353) internal successors, (188), 85 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 188 transitions. [2022-01-18 04:48:48,736 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 188 transitions. Word has length 15 [2022-01-18 04:48:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:48,736 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 188 transitions. [2022-01-18 04:48:48,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 188 transitions. [2022-01-18 04:48:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:48,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:48,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:48,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 04:48:48,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:48,947 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:48,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2014849937, now seen corresponding path program 23 times [2022-01-18 04:48:48,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:48,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405330456] [2022-01-18 04:48:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:48,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:49,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:49,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405330456] [2022-01-18 04:48:49,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405330456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:49,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980048022] [2022-01-18 04:48:49,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:48:49,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:49,009 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) [2022-01-18 04:48:49,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 04:48:49,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:48:49,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:49,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:49,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:49,248 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 34 treesize of output 34 [2022-01-18 04:48:49,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:48:49,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 04:48:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:49,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980048022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:49,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:49,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:48:49,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634918895] [2022-01-18 04:48:49,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:49,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:48:49,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:48:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:49,318 INFO L87 Difference]: Start difference. First operand 86 states and 188 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:49,374 INFO L93 Difference]: Finished difference Result 98 states and 207 transitions. [2022-01-18 04:48:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:48:49,374 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:49,375 INFO L225 Difference]: With dead ends: 98 [2022-01-18 04:48:49,375 INFO L226 Difference]: Without dead ends: 98 [2022-01-18 04:48:49,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:48:49,375 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:49,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 39 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-18 04:48:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2022-01-18 04:48:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2022-01-18 04:48:49,377 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 15 [2022-01-18 04:48:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:49,378 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2022-01-18 04:48:49,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2022-01-18 04:48:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:49,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:49,378 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:49,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 04:48:49,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:49,587 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:49,588 INFO L85 PathProgramCache]: Analyzing trace with hash 576845739, now seen corresponding path program 24 times [2022-01-18 04:48:49,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:49,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679609059] [2022-01-18 04:48:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:49,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:49,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:49,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679609059] [2022-01-18 04:48:49,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679609059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:49,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459912789] [2022-01-18 04:48:49,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:48:49,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:49,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:49,647 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) [2022-01-18 04:48:49,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 04:48:49,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:48:49,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:49,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:49,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:49,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:48:49,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:48:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:49,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:49,949 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:49,949 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 30 treesize of output 25 [2022-01-18 04:48:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:49,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459912789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:49,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:49,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 04:48:49,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029922121] [2022-01-18 04:48:49,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:49,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:48:49,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:49,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:48:49,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:48:49,954 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:50,214 INFO L93 Difference]: Finished difference Result 155 states and 294 transitions. [2022-01-18 04:48:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:48:50,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:50,215 INFO L225 Difference]: With dead ends: 155 [2022-01-18 04:48:50,215 INFO L226 Difference]: Without dead ends: 155 [2022-01-18 04:48:50,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:48:50,216 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 113 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:50,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 109 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-18 04:48:50,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 82. [2022-01-18 04:48:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 81 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 175 transitions. [2022-01-18 04:48:50,218 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 175 transitions. Word has length 15 [2022-01-18 04:48:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:50,218 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 175 transitions. [2022-01-18 04:48:50,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 175 transitions. [2022-01-18 04:48:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:50,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:50,219 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:50,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:50,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:50,430 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1251320209, now seen corresponding path program 25 times [2022-01-18 04:48:50,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:50,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533239328] [2022-01-18 04:48:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:50,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:50,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:50,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533239328] [2022-01-18 04:48:50,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533239328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:50,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427509864] [2022-01-18 04:48:50,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:48:50,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:50,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:50,490 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) [2022-01-18 04:48:50,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 04:48:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:48:50,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:50,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2022-01-18 04:48:50,670 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 51 treesize of output 39 [2022-01-18 04:48:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:50,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:50,765 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:50,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 54 [2022-01-18 04:48:50,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 04:48:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:50,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427509864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:50,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:50,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-18 04:48:50,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835108964] [2022-01-18 04:48:50,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:50,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:48:50,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:50,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:48:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:48:50,814 INFO L87 Difference]: Start difference. First operand 82 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:51,108 INFO L93 Difference]: Finished difference Result 132 states and 256 transitions. [2022-01-18 04:48:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:48:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:51,109 INFO L225 Difference]: With dead ends: 132 [2022-01-18 04:48:51,109 INFO L226 Difference]: Without dead ends: 126 [2022-01-18 04:48:51,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:48:51,110 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:51,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 67 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-18 04:48:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 82. [2022-01-18 04:48:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2022-01-18 04:48:51,113 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 15 [2022-01-18 04:48:51,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:51,113 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2022-01-18 04:48:51,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2022-01-18 04:48:51,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:51,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:51,113 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:51,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:51,329 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,SelfDestructingSolverStorable33 [2022-01-18 04:48:51,329 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:51,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:51,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1587411593, now seen corresponding path program 26 times [2022-01-18 04:48:51,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:51,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612784204] [2022-01-18 04:48:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:51,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:51,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:51,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612784204] [2022-01-18 04:48:51,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612784204] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:51,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880013420] [2022-01-18 04:48:51,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:48:51,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:51,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:51,391 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) [2022-01-18 04:48:51,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 04:48:51,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:48:51,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:51,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:51,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:51,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:51,635 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:51,635 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 30 treesize of output 25 [2022-01-18 04:48:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:51,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880013420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:51,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:51,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 04:48:51,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867909654] [2022-01-18 04:48:51,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:51,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:48:51,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:51,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:48:51,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:48:51,641 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:51,762 INFO L93 Difference]: Finished difference Result 126 states and 254 transitions. [2022-01-18 04:48:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:48:51,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:51,763 INFO L225 Difference]: With dead ends: 126 [2022-01-18 04:48:51,763 INFO L226 Difference]: Without dead ends: 126 [2022-01-18 04:48:51,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:48:51,764 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:51,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 60 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-18 04:48:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2022-01-18 04:48:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.15) internal successors, (172), 80 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 172 transitions. [2022-01-18 04:48:51,766 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 172 transitions. Word has length 15 [2022-01-18 04:48:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:51,766 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 172 transitions. [2022-01-18 04:48:51,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 172 transitions. [2022-01-18 04:48:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:51,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:51,766 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:51,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:51,967 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,SelfDestructingSolverStorable34 [2022-01-18 04:48:51,967 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash -744973943, now seen corresponding path program 27 times [2022-01-18 04:48:51,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:51,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890361467] [2022-01-18 04:48:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:51,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:52,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:52,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890361467] [2022-01-18 04:48:52,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890361467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:52,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519573698] [2022-01-18 04:48:52,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:48:52,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:52,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:52,014 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) [2022-01-18 04:48:52,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 04:48:52,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:48:52,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:52,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:52,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:52,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-01-18 04:48:52,140 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 53 treesize of output 41 [2022-01-18 04:48:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:52,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:52,220 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:52,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2022-01-18 04:48:52,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 04:48:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:52,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519573698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:52,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:52,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 04:48:52,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659694777] [2022-01-18 04:48:52,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:52,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 04:48:52,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:52,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 04:48:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 04:48:52,266 INFO L87 Difference]: Start difference. First operand 81 states and 172 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:52,382 INFO L93 Difference]: Finished difference Result 109 states and 217 transitions. [2022-01-18 04:48:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:48:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:52,384 INFO L225 Difference]: With dead ends: 109 [2022-01-18 04:48:52,384 INFO L226 Difference]: Without dead ends: 98 [2022-01-18 04:48:52,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:48:52,384 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:52,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 32 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:48:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-18 04:48:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2022-01-18 04:48:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.16) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 162 transitions. [2022-01-18 04:48:52,386 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 162 transitions. Word has length 15 [2022-01-18 04:48:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:52,386 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 162 transitions. [2022-01-18 04:48:52,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 162 transitions. [2022-01-18 04:48:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:48:52,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:52,386 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:52,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 04:48:52,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 04:48:52,599 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1613464115, now seen corresponding path program 28 times [2022-01-18 04:48:52,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:52,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60812568] [2022-01-18 04:48:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:52,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:52,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:52,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60812568] [2022-01-18 04:48:52,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60812568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:52,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386208345] [2022-01-18 04:48:52,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:48:52,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:52,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:52,659 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) [2022-01-18 04:48:52,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 04:48:52,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:48:52,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:48:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:52,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:52,844 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:52,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-01-18 04:48:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:52,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386208345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:52,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:52,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 04:48:52,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755120020] [2022-01-18 04:48:52,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:52,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 04:48:52,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 04:48:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 04:48:52,849 INFO L87 Difference]: Start difference. First operand 76 states and 162 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:52,926 INFO L93 Difference]: Finished difference Result 112 states and 225 transitions. [2022-01-18 04:48:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:48:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:48:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:52,927 INFO L225 Difference]: With dead ends: 112 [2022-01-18 04:48:52,927 INFO L226 Difference]: Without dead ends: 112 [2022-01-18 04:48:52,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:48:52,927 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:52,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 70 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:48:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-18 04:48:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 74. [2022-01-18 04:48:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 155 transitions. [2022-01-18 04:48:52,929 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 155 transitions. Word has length 15 [2022-01-18 04:48:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:52,929 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 155 transitions. [2022-01-18 04:48:52,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 155 transitions. [2022-01-18 04:48:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:48:52,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:52,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:52,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:53,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:53,146 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:53,146 INFO L85 PathProgramCache]: Analyzing trace with hash -755081789, now seen corresponding path program 29 times [2022-01-18 04:48:53,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:53,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344754472] [2022-01-18 04:48:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:53,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:53,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:53,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344754472] [2022-01-18 04:48:53,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344754472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:53,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851146591] [2022-01-18 04:48:53,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:48:53,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:53,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:53,338 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) [2022-01-18 04:48:53,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 04:48:53,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:48:53,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:53,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:48:53,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:53,622 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 71 treesize of output 59 [2022-01-18 04:48:53,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:48:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:53,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:54,086 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:48:54,086 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 98 treesize of output 85 [2022-01-18 04:48:54,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:48:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:54,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851146591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:54,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:54,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 04:48:54,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807799468] [2022-01-18 04:48:54,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:54,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:48:54,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:48:54,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:48:54,174 INFO L87 Difference]: Start difference. First operand 74 states and 155 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:55,181 INFO L93 Difference]: Finished difference Result 207 states and 387 transitions. [2022-01-18 04:48:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:48:55,182 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:48:55,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:55,182 INFO L225 Difference]: With dead ends: 207 [2022-01-18 04:48:55,182 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 04:48:55,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 04:48:55,183 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 180 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:55,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 166 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:48:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 04:48:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 83. [2022-01-18 04:48:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1219512195121952) internal successors, (174), 82 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 174 transitions. [2022-01-18 04:48:55,185 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 174 transitions. Word has length 16 [2022-01-18 04:48:55,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:55,185 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 174 transitions. [2022-01-18 04:48:55,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 174 transitions. [2022-01-18 04:48:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:48:55,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:55,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:55,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:55,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 04:48:55,402 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1594185491, now seen corresponding path program 30 times [2022-01-18 04:48:55,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:55,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445569895] [2022-01-18 04:48:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:55,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:55,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:55,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445569895] [2022-01-18 04:48:55,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445569895] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:55,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525758340] [2022-01-18 04:48:55,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:48:55,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:55,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:55,684 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) [2022-01-18 04:48:55,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 04:48:55,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:48:55,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:48:55,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:48:55,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:56,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2022-01-18 04:48:56,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 04:48:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:56,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:56,534 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:48:56,535 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 147 treesize of output 120 [2022-01-18 04:48:56,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:48:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:56,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525758340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:56,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:56,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 04:48:56,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595366120] [2022-01-18 04:48:56,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:56,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:48:56,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:48:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:48:56,624 INFO L87 Difference]: Start difference. First operand 83 states and 174 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:57,265 INFO L93 Difference]: Finished difference Result 145 states and 274 transitions. [2022-01-18 04:48:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:48:57,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:48:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:57,266 INFO L225 Difference]: With dead ends: 145 [2022-01-18 04:48:57,266 INFO L226 Difference]: Without dead ends: 131 [2022-01-18 04:48:57,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:48:57,267 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:57,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 215 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:48:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-18 04:48:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 84. [2022-01-18 04:48:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 83 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 177 transitions. [2022-01-18 04:48:57,269 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 177 transitions. Word has length 16 [2022-01-18 04:48:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:57,269 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 177 transitions. [2022-01-18 04:48:57,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 177 transitions. [2022-01-18 04:48:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:48:57,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:57,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:57,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 04:48:57,483 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,SelfDestructingSolverStorable38 [2022-01-18 04:48:57,483 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1627784719, now seen corresponding path program 31 times [2022-01-18 04:48:57,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:57,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693464648] [2022-01-18 04:48:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:57,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:57,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:48:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693464648] [2022-01-18 04:48:57,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693464648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:48:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527950620] [2022-01-18 04:48:57,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:48:57,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:48:57,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:48:57,792 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) [2022-01-18 04:48:57,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 04:48:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:48:57,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:48:57,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:48:58,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:48:58,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:48:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:58,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:48:58,630 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:48:58,630 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 144 treesize of output 117 [2022-01-18 04:48:58,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:48:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:48:58,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527950620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:48:58,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:48:58,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 04:48:58,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016571258] [2022-01-18 04:48:58,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:48:58,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:48:58,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:48:58,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:48:58,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:48:58,732 INFO L87 Difference]: Start difference. First operand 84 states and 177 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:48:59,677 INFO L93 Difference]: Finished difference Result 202 states and 365 transitions. [2022-01-18 04:48:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:48:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:48:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:48:59,678 INFO L225 Difference]: With dead ends: 202 [2022-01-18 04:48:59,678 INFO L226 Difference]: Without dead ends: 171 [2022-01-18 04:48:59,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:48:59,679 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:48:59,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 245 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:48:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-18 04:48:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 91. [2022-01-18 04:48:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.188888888888889) internal successors, (197), 90 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 197 transitions. [2022-01-18 04:48:59,681 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 197 transitions. Word has length 16 [2022-01-18 04:48:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:48:59,681 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 197 transitions. [2022-01-18 04:48:59,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:48:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 197 transitions. [2022-01-18 04:48:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:48:59,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:48:59,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:48:59,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 04:48:59,882 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,SelfDestructingSolverStorable39 [2022-01-18 04:48:59,882 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:48:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:48:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash -587888749, now seen corresponding path program 32 times [2022-01-18 04:48:59,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:48:59,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213277559] [2022-01-18 04:48:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:48:59,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:48:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:00,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:00,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213277559] [2022-01-18 04:49:00,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213277559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:00,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154279467] [2022-01-18 04:49:00,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:49:00,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:00,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:00,070 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) [2022-01-18 04:49:00,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 04:49:00,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:49:00,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:00,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:00,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-01-18 04:49:00,300 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 79 treesize of output 63 [2022-01-18 04:49:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:00,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:00,860 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:49:00,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 105 [2022-01-18 04:49:00,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 76 [2022-01-18 04:49:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:00,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154279467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:00,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:00,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 04:49:00,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901957018] [2022-01-18 04:49:00,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:00,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:49:00,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:00,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:49:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:49:00,947 INFO L87 Difference]: Start difference. First operand 91 states and 197 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:02,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:02,531 INFO L93 Difference]: Finished difference Result 250 states and 440 transitions. [2022-01-18 04:49:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:49:02,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:02,532 INFO L225 Difference]: With dead ends: 250 [2022-01-18 04:49:02,532 INFO L226 Difference]: Without dead ends: 203 [2022-01-18 04:49:02,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 04:49:02,532 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 280 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:02,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 329 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:49:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-18 04:49:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 91. [2022-01-18 04:49:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2) internal successors, (198), 90 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 198 transitions. [2022-01-18 04:49:02,535 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 198 transitions. Word has length 16 [2022-01-18 04:49:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:02,535 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 198 transitions. [2022-01-18 04:49:02,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 198 transitions. [2022-01-18 04:49:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:02,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:02,535 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:02,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 04:49:02,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:02,749 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:02,749 INFO L85 PathProgramCache]: Analyzing trace with hash 192056335, now seen corresponding path program 33 times [2022-01-18 04:49:02,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:02,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193352536] [2022-01-18 04:49:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:02,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:02,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:02,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193352536] [2022-01-18 04:49:02,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193352536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:02,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083634842] [2022-01-18 04:49:02,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:49:02,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:02,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:02,811 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) [2022-01-18 04:49:02,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 04:49:02,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:49:02,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:49:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:02,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:49:02,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:49:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:03,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:03,097 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:03,097 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 65 treesize of output 56 [2022-01-18 04:49:03,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 04:49:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:03,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083634842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:03,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:03,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 04:49:03,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643868598] [2022-01-18 04:49:03,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:03,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:49:03,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:49:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:49:03,141 INFO L87 Difference]: Start difference. First operand 91 states and 198 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:03,349 INFO L93 Difference]: Finished difference Result 113 states and 230 transitions. [2022-01-18 04:49:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:49:03,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:03,350 INFO L225 Difference]: With dead ends: 113 [2022-01-18 04:49:03,350 INFO L226 Difference]: Without dead ends: 111 [2022-01-18 04:49:03,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:49:03,350 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:03,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 62 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:49:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-18 04:49:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2022-01-18 04:49:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2022-01-18 04:49:03,352 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 16 [2022-01-18 04:49:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:03,352 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2022-01-18 04:49:03,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2022-01-18 04:49:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:03,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:03,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:03,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 04:49:03,566 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,SelfDestructingSolverStorable41 [2022-01-18 04:49:03,567 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:03,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash -560398457, now seen corresponding path program 34 times [2022-01-18 04:49:03,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:03,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14876283] [2022-01-18 04:49:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:03,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:03,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:03,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14876283] [2022-01-18 04:49:03,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14876283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:03,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628730156] [2022-01-18 04:49:03,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:49:03,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:03,846 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) [2022-01-18 04:49:03,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 04:49:03,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:49:03,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:04,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 04:49:04,136 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 61 treesize of output 49 [2022-01-18 04:49:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:04,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:04,447 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:04,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 04:49:04,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 04:49:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:04,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628730156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:04,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:04,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 04:49:04,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511958567] [2022-01-18 04:49:04,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:04,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:04,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:04,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:04,559 INFO L87 Difference]: Start difference. First operand 90 states and 195 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:05,470 INFO L93 Difference]: Finished difference Result 209 states and 386 transitions. [2022-01-18 04:49:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:49:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:05,471 INFO L225 Difference]: With dead ends: 209 [2022-01-18 04:49:05,471 INFO L226 Difference]: Without dead ends: 184 [2022-01-18 04:49:05,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:49:05,472 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 243 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:05,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 219 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-18 04:49:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 98. [2022-01-18 04:49:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2577319587628866) internal successors, (219), 97 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 219 transitions. [2022-01-18 04:49:05,474 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 219 transitions. Word has length 16 [2022-01-18 04:49:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:05,474 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 219 transitions. [2022-01-18 04:49:05,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:05,475 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 219 transitions. [2022-01-18 04:49:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:05,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:05,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:05,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 04:49:05,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:05,683 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:05,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1518895371, now seen corresponding path program 35 times [2022-01-18 04:49:05,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:05,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611108727] [2022-01-18 04:49:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:05,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:05,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611108727] [2022-01-18 04:49:05,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611108727] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778917999] [2022-01-18 04:49:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:49:05,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:05,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:05,860 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) [2022-01-18 04:49:05,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 04:49:05,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:49:05,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:05,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:05,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:06,128 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 99 treesize of output 83 [2022-01-18 04:49:06,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:49:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:06,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:06,565 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:06,566 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 118 treesize of output 101 [2022-01-18 04:49:06,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 04:49:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:06,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778917999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:06,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:06,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 04:49:06,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263399322] [2022-01-18 04:49:06,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:06,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:06,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:06,683 INFO L87 Difference]: Start difference. First operand 98 states and 219 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:07,929 INFO L93 Difference]: Finished difference Result 229 states and 422 transitions. [2022-01-18 04:49:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:49:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:07,930 INFO L225 Difference]: With dead ends: 229 [2022-01-18 04:49:07,930 INFO L226 Difference]: Without dead ends: 203 [2022-01-18 04:49:07,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:49:07,931 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 284 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:07,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 249 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-18 04:49:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 98. [2022-01-18 04:49:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2371134020618557) internal successors, (217), 97 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 217 transitions. [2022-01-18 04:49:07,933 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 217 transitions. Word has length 16 [2022-01-18 04:49:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:07,933 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 217 transitions. [2022-01-18 04:49:07,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 217 transitions. [2022-01-18 04:49:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:07,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:07,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:07,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 04:49:08,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-01-18 04:49:08,147 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:08,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:08,148 INFO L85 PathProgramCache]: Analyzing trace with hash -629901165, now seen corresponding path program 36 times [2022-01-18 04:49:08,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:08,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959420884] [2022-01-18 04:49:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:08,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:08,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959420884] [2022-01-18 04:49:08,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959420884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206874501] [2022-01-18 04:49:08,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:49:08,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:08,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:08,299 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) [2022-01-18 04:49:08,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 04:49:08,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:49:08,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:08,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:08,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:08,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:49:08,570 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 85 treesize of output 69 [2022-01-18 04:49:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:08,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:09,244 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:09,245 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 103 treesize of output 90 [2022-01-18 04:49:09,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:49:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:09,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206874501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:09,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:09,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 04:49:09,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655581787] [2022-01-18 04:49:09,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:09,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:49:09,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:09,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:49:09,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:49:09,386 INFO L87 Difference]: Start difference. First operand 98 states and 217 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:10,399 INFO L93 Difference]: Finished difference Result 258 states and 477 transitions. [2022-01-18 04:49:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:49:10,399 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:10,400 INFO L225 Difference]: With dead ends: 258 [2022-01-18 04:49:10,400 INFO L226 Difference]: Without dead ends: 208 [2022-01-18 04:49:10,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 04:49:10,401 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 185 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:10,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 277 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-18 04:49:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 104. [2022-01-18 04:49:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.29126213592233) internal successors, (236), 103 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 236 transitions. [2022-01-18 04:49:10,403 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 236 transitions. Word has length 16 [2022-01-18 04:49:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:10,403 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 236 transitions. [2022-01-18 04:49:10,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 236 transitions. [2022-01-18 04:49:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:10,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:10,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:10,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 04:49:10,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:10,619 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash -165867449, now seen corresponding path program 37 times [2022-01-18 04:49:10,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:10,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652657864] [2022-01-18 04:49:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:10,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:10,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:10,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652657864] [2022-01-18 04:49:10,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652657864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:10,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564160275] [2022-01-18 04:49:10,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:49:10,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:10,829 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) [2022-01-18 04:49:10,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 04:49:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:10,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:11,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:49:11,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:49:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:11,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:11,590 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:49:11,591 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 147 treesize of output 120 [2022-01-18 04:49:11,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:49:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:11,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564160275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:11,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:11,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 04:49:11,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455343080] [2022-01-18 04:49:11,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:11,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:49:11,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:11,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:49:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:49:11,750 INFO L87 Difference]: Start difference. First operand 104 states and 236 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:12,365 INFO L93 Difference]: Finished difference Result 200 states and 399 transitions. [2022-01-18 04:49:12,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:49:12,366 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:12,366 INFO L225 Difference]: With dead ends: 200 [2022-01-18 04:49:12,366 INFO L226 Difference]: Without dead ends: 180 [2022-01-18 04:49:12,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:49:12,367 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:12,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 271 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-18 04:49:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 111. [2022-01-18 04:49:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.3363636363636364) internal successors, (257), 110 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 257 transitions. [2022-01-18 04:49:12,369 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 257 transitions. Word has length 16 [2022-01-18 04:49:12,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:12,369 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 257 transitions. [2022-01-18 04:49:12,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 257 transitions. [2022-01-18 04:49:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:12,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:12,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:12,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 04:49:12,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 04:49:12,582 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash -132268221, now seen corresponding path program 38 times [2022-01-18 04:49:12,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:12,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506321654] [2022-01-18 04:49:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:12,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:12,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:12,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506321654] [2022-01-18 04:49:12,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506321654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:12,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954686411] [2022-01-18 04:49:12,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:49:12,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:12,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:12,852 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) [2022-01-18 04:49:12,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 04:49:12,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:49:12,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:12,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:12,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:13,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-01-18 04:49:13,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:49:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:13,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:13,700 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:49:13,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 117 [2022-01-18 04:49:13,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:49:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:13,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954686411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:13,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:13,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 04:49:13,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955492339] [2022-01-18 04:49:13,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:13,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:49:13,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:13,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:49:13,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:49:13,794 INFO L87 Difference]: Start difference. First operand 111 states and 257 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:15,068 INFO L93 Difference]: Finished difference Result 233 states and 462 transitions. [2022-01-18 04:49:15,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:49:15,068 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:15,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:15,069 INFO L225 Difference]: With dead ends: 233 [2022-01-18 04:49:15,069 INFO L226 Difference]: Without dead ends: 208 [2022-01-18 04:49:15,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:49:15,070 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 156 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:15,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 254 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-18 04:49:15,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 115. [2022-01-18 04:49:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.3596491228070176) internal successors, (269), 114 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 269 transitions. [2022-01-18 04:49:15,072 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 269 transitions. Word has length 16 [2022-01-18 04:49:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:15,072 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 269 transitions. [2022-01-18 04:49:15,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 269 transitions. [2022-01-18 04:49:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:15,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:15,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:15,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 04:49:15,289 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,SelfDestructingSolverStorable46 [2022-01-18 04:49:15,289 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:15,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1947025607, now seen corresponding path program 39 times [2022-01-18 04:49:15,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:15,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582312171] [2022-01-18 04:49:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:15,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:15,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582312171] [2022-01-18 04:49:15,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582312171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088864809] [2022-01-18 04:49:15,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:49:15,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:15,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:15,475 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) [2022-01-18 04:49:15,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 04:49:15,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:49:15,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:15,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:15,715 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 104 treesize of output 88 [2022-01-18 04:49:15,717 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 88 treesize of output 72 [2022-01-18 04:49:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:15,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:16,358 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:49:16,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 105 [2022-01-18 04:49:16,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 76 [2022-01-18 04:49:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:16,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088864809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:16,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:16,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 04:49:16,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564854848] [2022-01-18 04:49:16,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:16,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:49:16,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:16,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:49:16,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:49:16,462 INFO L87 Difference]: Start difference. First operand 115 states and 269 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:18,175 INFO L93 Difference]: Finished difference Result 316 states and 582 transitions. [2022-01-18 04:49:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:49:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:18,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:18,176 INFO L225 Difference]: With dead ends: 316 [2022-01-18 04:49:18,176 INFO L226 Difference]: Without dead ends: 269 [2022-01-18 04:49:18,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 04:49:18,177 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 123 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:18,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 386 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:49:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-18 04:49:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 116. [2022-01-18 04:49:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.373913043478261) internal successors, (273), 115 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 273 transitions. [2022-01-18 04:49:18,181 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 273 transitions. Word has length 16 [2022-01-18 04:49:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:18,181 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 273 transitions. [2022-01-18 04:49:18,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 273 transitions. [2022-01-18 04:49:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:18,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:18,182 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:18,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 04:49:18,382 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,SelfDestructingSolverStorable47 [2022-01-18 04:49:18,382 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1118959171, now seen corresponding path program 40 times [2022-01-18 04:49:18,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:18,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480480740] [2022-01-18 04:49:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:18,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:18,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:18,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480480740] [2022-01-18 04:49:18,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480480740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:18,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007360508] [2022-01-18 04:49:18,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:49:18,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:18,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:18,444 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) [2022-01-18 04:49:18,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 04:49:18,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:49:18,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:18,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:49:18,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:18,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:49:18,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:49:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:18,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:18,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:49:18,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-01-18 04:49:18,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:49:18,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-01-18 04:49:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:18,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007360508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:18,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:18,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:49:18,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931076997] [2022-01-18 04:49:18,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:18,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:49:18,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:18,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:49:18,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:49:18,763 INFO L87 Difference]: Start difference. First operand 116 states and 273 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:18,836 INFO L93 Difference]: Finished difference Result 143 states and 325 transitions. [2022-01-18 04:49:18,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:49:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:18,836 INFO L225 Difference]: With dead ends: 143 [2022-01-18 04:49:18,836 INFO L226 Difference]: Without dead ends: 143 [2022-01-18 04:49:18,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:49:18,837 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:18,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 69 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:49:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-18 04:49:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2022-01-18 04:49:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.3706896551724137) internal successors, (275), 116 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 275 transitions. [2022-01-18 04:49:18,839 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 275 transitions. Word has length 16 [2022-01-18 04:49:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:18,839 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 275 transitions. [2022-01-18 04:49:18,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:18,839 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 275 transitions. [2022-01-18 04:49:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:18,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:18,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:18,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 04:49:19,065 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,SelfDestructingSolverStorable48 [2022-01-18 04:49:19,066 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1434653117, now seen corresponding path program 41 times [2022-01-18 04:49:19,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:19,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370708554] [2022-01-18 04:49:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:19,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:19,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:19,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370708554] [2022-01-18 04:49:19,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370708554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:19,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106955620] [2022-01-18 04:49:19,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:49:19,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:19,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:19,332 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) [2022-01-18 04:49:19,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 04:49:19,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:49:19,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:19,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:49:19,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:49:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:19,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:20,016 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:20,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 104 [2022-01-18 04:49:20,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 04:49:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:20,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106955620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:20,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:20,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 04:49:20,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248128301] [2022-01-18 04:49:20,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:20,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:20,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:20,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:20,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:20,129 INFO L87 Difference]: Start difference. First operand 117 states and 275 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:20,833 INFO L93 Difference]: Finished difference Result 230 states and 466 transitions. [2022-01-18 04:49:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:49:20,834 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:20,834 INFO L225 Difference]: With dead ends: 230 [2022-01-18 04:49:20,834 INFO L226 Difference]: Without dead ends: 205 [2022-01-18 04:49:20,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 04:49:20,835 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:20,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 222 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-18 04:49:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 124. [2022-01-18 04:49:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.4065040650406506) internal successors, (296), 123 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 296 transitions. [2022-01-18 04:49:20,837 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 296 transitions. Word has length 16 [2022-01-18 04:49:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:20,837 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 296 transitions. [2022-01-18 04:49:20,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 296 transitions. [2022-01-18 04:49:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:20,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:20,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:20,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 04:49:21,038 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,SelfDestructingSolverStorable49 [2022-01-18 04:49:21,038 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash 644640711, now seen corresponding path program 42 times [2022-01-18 04:49:21,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:21,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202110052] [2022-01-18 04:49:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:21,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:21,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:21,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202110052] [2022-01-18 04:49:21,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202110052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:21,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060579255] [2022-01-18 04:49:21,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:49:21,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:21,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:21,212 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) [2022-01-18 04:49:21,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 04:49:21,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:49:21,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:21,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:21,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:21,481 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 99 treesize of output 83 [2022-01-18 04:49:21,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:49:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:21,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:22,127 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:22,127 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 106 treesize of output 93 [2022-01-18 04:49:22,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:49:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:22,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060579255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:22,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:22,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 04:49:22,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18206818] [2022-01-18 04:49:22,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:22,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:22,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:22,237 INFO L87 Difference]: Start difference. First operand 124 states and 296 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:23,075 INFO L93 Difference]: Finished difference Result 277 states and 540 transitions. [2022-01-18 04:49:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:49:23,076 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:23,076 INFO L225 Difference]: With dead ends: 277 [2022-01-18 04:49:23,077 INFO L226 Difference]: Without dead ends: 237 [2022-01-18 04:49:23,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:49:23,077 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 126 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:23,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 274 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-18 04:49:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 125. [2022-01-18 04:49:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.3951612903225805) internal successors, (297), 124 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 297 transitions. [2022-01-18 04:49:23,080 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 297 transitions. Word has length 16 [2022-01-18 04:49:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:23,080 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 297 transitions. [2022-01-18 04:49:23,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 297 transitions. [2022-01-18 04:49:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:23,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:23,080 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:23,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 04:49:23,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:23,296 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:23,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1504155825, now seen corresponding path program 43 times [2022-01-18 04:49:23,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:23,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311301089] [2022-01-18 04:49:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:23,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:23,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311301089] [2022-01-18 04:49:23,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311301089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465118399] [2022-01-18 04:49:23,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:49:23,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:23,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:23,437 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) [2022-01-18 04:49:23,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 04:49:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:23,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:23,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:23,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:49:23,716 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 83 treesize of output 67 [2022-01-18 04:49:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:23,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:24,357 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:24,357 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 103 treesize of output 90 [2022-01-18 04:49:24,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:49:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:24,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465118399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:24,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:24,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 04:49:24,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820750075] [2022-01-18 04:49:24,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:24,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:24,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:24,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:24,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:24,460 INFO L87 Difference]: Start difference. First operand 125 states and 297 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:25,775 INFO L93 Difference]: Finished difference Result 263 states and 523 transitions. [2022-01-18 04:49:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:49:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:25,776 INFO L225 Difference]: With dead ends: 263 [2022-01-18 04:49:25,776 INFO L226 Difference]: Without dead ends: 200 [2022-01-18 04:49:25,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 04:49:25,776 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:25,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 237 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-18 04:49:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 127. [2022-01-18 04:49:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.3968253968253967) internal successors, (302), 126 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 302 transitions. [2022-01-18 04:49:25,779 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 302 transitions. Word has length 16 [2022-01-18 04:49:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:25,779 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 302 transitions. [2022-01-18 04:49:25,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 302 transitions. [2022-01-18 04:49:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:25,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:25,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:25,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 04:49:25,995 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,SelfDestructingSolverStorable51 [2022-01-18 04:49:25,995 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:25,996 INFO L85 PathProgramCache]: Analyzing trace with hash 602628295, now seen corresponding path program 44 times [2022-01-18 04:49:25,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:25,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020108722] [2022-01-18 04:49:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:25,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:26,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020108722] [2022-01-18 04:49:26,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020108722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590741850] [2022-01-18 04:49:26,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:49:26,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:26,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:26,155 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) [2022-01-18 04:49:26,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 04:49:26,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:49:26,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:26,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:26,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:26,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:49:26,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:49:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:26,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:27,113 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:49:27,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 100 [2022-01-18 04:49:27,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-01-18 04:49:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:27,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590741850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:27,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:27,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 04:49:27,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013777941] [2022-01-18 04:49:27,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:27,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:49:27,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:27,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:49:27,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:49:27,269 INFO L87 Difference]: Start difference. First operand 127 states and 302 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:28,334 INFO L93 Difference]: Finished difference Result 288 states and 572 transitions. [2022-01-18 04:49:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:49:28,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:28,336 INFO L225 Difference]: With dead ends: 288 [2022-01-18 04:49:28,336 INFO L226 Difference]: Without dead ends: 226 [2022-01-18 04:49:28,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:49:28,336 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 141 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:28,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 216 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:28,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-18 04:49:28,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 134. [2022-01-18 04:49:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.4210526315789473) internal successors, (322), 133 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2022-01-18 04:49:28,339 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 16 [2022-01-18 04:49:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:28,339 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2022-01-18 04:49:28,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2022-01-18 04:49:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:28,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:28,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:28,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 04:49:28,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:28,543 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:28,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash 682755023, now seen corresponding path program 45 times [2022-01-18 04:49:28,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:28,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61740458] [2022-01-18 04:49:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:28,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:28,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:28,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61740458] [2022-01-18 04:49:28,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61740458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:28,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713768455] [2022-01-18 04:49:28,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:49:28,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:28,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:28,818 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) [2022-01-18 04:49:28,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 04:49:28,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:49:28,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:28,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:28,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:29,109 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 93 treesize of output 77 [2022-01-18 04:49:29,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:49:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:29,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:29,586 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:49:29,586 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 144 treesize of output 117 [2022-01-18 04:49:29,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:49:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:29,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713768455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:29,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:29,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 04:49:29,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019522641] [2022-01-18 04:49:29,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:29,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:49:29,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:49:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:49:29,668 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:30,502 INFO L93 Difference]: Finished difference Result 248 states and 522 transitions. [2022-01-18 04:49:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:49:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:30,503 INFO L225 Difference]: With dead ends: 248 [2022-01-18 04:49:30,503 INFO L226 Difference]: Without dead ends: 234 [2022-01-18 04:49:30,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:49:30,503 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 96 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:30,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 300 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:49:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-18 04:49:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 144. [2022-01-18 04:49:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.4545454545454546) internal successors, (351), 143 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2022-01-18 04:49:30,506 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 16 [2022-01-18 04:49:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:30,506 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2022-01-18 04:49:30,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2022-01-18 04:49:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:30,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:30,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:30,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 04:49:30,720 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,SelfDestructingSolverStorable53 [2022-01-18 04:49:30,720 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash 716354251, now seen corresponding path program 46 times [2022-01-18 04:49:30,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:30,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476058756] [2022-01-18 04:49:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:30,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:30,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:30,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476058756] [2022-01-18 04:49:30,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476058756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:30,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374665459] [2022-01-18 04:49:30,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:49:30,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:30,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:30,954 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) [2022-01-18 04:49:30,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 04:49:30,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:49:30,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:30,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:30,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:31,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:49:31,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:49:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:31,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:31,722 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:49:31,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 120 [2022-01-18 04:49:31,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:49:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374665459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:31,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:31,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 04:49:31,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364460287] [2022-01-18 04:49:31,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:31,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:49:31,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:49:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:49:31,842 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:33,116 INFO L93 Difference]: Finished difference Result 314 states and 627 transitions. [2022-01-18 04:49:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:49:33,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:33,117 INFO L225 Difference]: With dead ends: 314 [2022-01-18 04:49:33,117 INFO L226 Difference]: Without dead ends: 269 [2022-01-18 04:49:33,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 04:49:33,118 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 160 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:33,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 224 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-18 04:49:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 150. [2022-01-18 04:49:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.476510067114094) internal successors, (369), 149 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 369 transitions. [2022-01-18 04:49:33,121 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 369 transitions. Word has length 16 [2022-01-18 04:49:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:33,121 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 369 transitions. [2022-01-18 04:49:33,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 369 transitions. [2022-01-18 04:49:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:33,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:33,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:33,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 04:49:33,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:33,338 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:33,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:33,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1499319217, now seen corresponding path program 47 times [2022-01-18 04:49:33,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:33,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012192965] [2022-01-18 04:49:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:33,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:33,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:33,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012192965] [2022-01-18 04:49:33,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012192965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:33,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206019727] [2022-01-18 04:49:33,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:49:33,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:33,525 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) [2022-01-18 04:49:33,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 04:49:33,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:49:33,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:33,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:33,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:33,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:49:33,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:49:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:34,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:34,543 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:49:34,544 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 144 treesize of output 117 [2022-01-18 04:49:34,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:49:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:34,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206019727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:34,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:34,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 04:49:34,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802791645] [2022-01-18 04:49:34,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:34,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:49:34,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:49:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:49:34,654 INFO L87 Difference]: Start difference. First operand 150 states and 369 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:36,426 INFO L93 Difference]: Finished difference Result 348 states and 675 transitions. [2022-01-18 04:49:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:49:36,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:36,431 INFO L225 Difference]: With dead ends: 348 [2022-01-18 04:49:36,431 INFO L226 Difference]: Without dead ends: 294 [2022-01-18 04:49:36,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=310, Invalid=1496, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:49:36,431 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:36,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 250 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-18 04:49:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 149. [2022-01-18 04:49:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.4594594594594597) internal successors, (364), 148 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 364 transitions. [2022-01-18 04:49:36,434 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 364 transitions. Word has length 16 [2022-01-18 04:49:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:36,434 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 364 transitions. [2022-01-18 04:49:36,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 364 transitions. [2022-01-18 04:49:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:36,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:36,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:36,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 04:49:36,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:36,650 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:36,650 INFO L85 PathProgramCache]: Analyzing trace with hash 622925699, now seen corresponding path program 48 times [2022-01-18 04:49:36,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:36,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599550914] [2022-01-18 04:49:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:36,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:36,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:36,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599550914] [2022-01-18 04:49:36,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599550914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:36,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814694240] [2022-01-18 04:49:36,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:49:36,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:36,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:36,802 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) [2022-01-18 04:49:36,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 04:49:36,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:49:36,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:36,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:37,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:49:37,070 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 83 treesize of output 67 [2022-01-18 04:49:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:37,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:37,482 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:37,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 90 [2022-01-18 04:49:37,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:49:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:37,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814694240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:37,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:37,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 04:49:37,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632976497] [2022-01-18 04:49:37,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:37,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:37,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:37,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:37,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:37,584 INFO L87 Difference]: Start difference. First operand 149 states and 364 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:38,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:38,437 INFO L93 Difference]: Finished difference Result 228 states and 490 transitions. [2022-01-18 04:49:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:49:38,437 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:38,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:38,438 INFO L225 Difference]: With dead ends: 228 [2022-01-18 04:49:38,438 INFO L226 Difference]: Without dead ends: 193 [2022-01-18 04:49:38,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 04:49:38,438 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 138 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:38,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 169 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:49:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-18 04:49:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2022-01-18 04:49:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.46) internal successors, (369), 150 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 369 transitions. [2022-01-18 04:49:38,441 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 369 transitions. Word has length 16 [2022-01-18 04:49:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:38,441 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 369 transitions. [2022-01-18 04:49:38,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 369 transitions. [2022-01-18 04:49:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:38,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:38,441 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:38,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 04:49:38,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 04:49:38,648 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash -685774905, now seen corresponding path program 49 times [2022-01-18 04:49:38,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:38,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289711306] [2022-01-18 04:49:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:38,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:38,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:38,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289711306] [2022-01-18 04:49:38,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289711306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:38,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203640290] [2022-01-18 04:49:38,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:49:38,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:38,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:38,701 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) [2022-01-18 04:49:38,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 04:49:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:49:38,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:38,816 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 98 treesize of output 82 [2022-01-18 04:49:38,818 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 82 treesize of output 66 [2022-01-18 04:49:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:38,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:38,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:49:38,958 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 65 treesize of output 61 [2022-01-18 04:49:38,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:49:38,965 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 53 treesize of output 49 [2022-01-18 04:49:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:39,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203640290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:39,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:39,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:49:39,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045385673] [2022-01-18 04:49:39,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:39,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:49:39,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:49:39,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:49:39,051 INFO L87 Difference]: Start difference. First operand 151 states and 369 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:39,101 INFO L93 Difference]: Finished difference Result 158 states and 379 transitions. [2022-01-18 04:49:39,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:49:39,101 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:39,102 INFO L225 Difference]: With dead ends: 158 [2022-01-18 04:49:39,102 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 04:49:39,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:49:39,102 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:39,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 33 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:49:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 04:49:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-01-18 04:49:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.4496644295302015) internal successors, (365), 149 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 365 transitions. [2022-01-18 04:49:39,104 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 365 transitions. Word has length 16 [2022-01-18 04:49:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:39,105 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 365 transitions. [2022-01-18 04:49:39,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 365 transitions. [2022-01-18 04:49:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:39,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:39,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:39,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 04:49:39,320 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,SelfDestructingSolverStorable57 [2022-01-18 04:49:39,320 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1541331633, now seen corresponding path program 50 times [2022-01-18 04:49:39,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:39,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749792561] [2022-01-18 04:49:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:39,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:39,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:39,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749792561] [2022-01-18 04:49:39,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749792561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:39,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022414924] [2022-01-18 04:49:39,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:49:39,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:39,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:39,497 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) [2022-01-18 04:49:39,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 04:49:39,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:49:39,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:39,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:39,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:49:39,746 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 85 treesize of output 69 [2022-01-18 04:49:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:40,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:40,318 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:40,318 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 106 treesize of output 93 [2022-01-18 04:49:40,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:49:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:40,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022414924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:40,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:40,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 04:49:40,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43353495] [2022-01-18 04:49:40,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:40,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:40,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:40,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:40,441 INFO L87 Difference]: Start difference. First operand 150 states and 365 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:41,274 INFO L93 Difference]: Finished difference Result 285 states and 587 transitions. [2022-01-18 04:49:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:49:41,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:41,275 INFO L225 Difference]: With dead ends: 285 [2022-01-18 04:49:41,275 INFO L226 Difference]: Without dead ends: 235 [2022-01-18 04:49:41,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:49:41,276 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 164 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:41,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 211 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:49:41,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-18 04:49:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2022-01-18 04:49:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.4496644295302015) internal successors, (365), 149 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 365 transitions. [2022-01-18 04:49:41,278 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 365 transitions. Word has length 16 [2022-01-18 04:49:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:41,278 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 365 transitions. [2022-01-18 04:49:41,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 365 transitions. [2022-01-18 04:49:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:41,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:41,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:41,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 04:49:41,479 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,SelfDestructingSolverStorable58 [2022-01-18 04:49:41,479 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:41,480 INFO L85 PathProgramCache]: Analyzing trace with hash -586030645, now seen corresponding path program 51 times [2022-01-18 04:49:41,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:41,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263826647] [2022-01-18 04:49:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:41,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:41,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:41,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263826647] [2022-01-18 04:49:41,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263826647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:41,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567467902] [2022-01-18 04:49:41,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:49:41,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:41,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:41,709 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) [2022-01-18 04:49:41,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 04:49:41,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:49:41,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:41,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:41,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:42,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:49:42,062 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 59 treesize of output 47 [2022-01-18 04:49:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:42,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:42,481 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:42,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 04:49:42,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 04:49:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:42,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567467902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:42,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:42,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 04:49:42,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438556532] [2022-01-18 04:49:42,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:42,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:42,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:42,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:42,596 INFO L87 Difference]: Start difference. First operand 150 states and 365 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:43,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:43,326 INFO L93 Difference]: Finished difference Result 251 states and 542 transitions. [2022-01-18 04:49:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:49:43,327 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:43,328 INFO L225 Difference]: With dead ends: 251 [2022-01-18 04:49:43,328 INFO L226 Difference]: Without dead ends: 233 [2022-01-18 04:49:43,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:49:43,329 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:43,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 205 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-18 04:49:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 154. [2022-01-18 04:49:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.477124183006536) internal successors, (379), 153 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) [2022-01-18 04:49:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 379 transitions. [2022-01-18 04:49:43,331 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 379 transitions. Word has length 16 [2022-01-18 04:49:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:43,331 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 379 transitions. [2022-01-18 04:49:43,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:43,331 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 379 transitions. [2022-01-18 04:49:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:43,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:43,332 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:43,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 04:49:43,543 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,SelfDestructingSolverStorable59 [2022-01-18 04:49:43,543 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash -854671771, now seen corresponding path program 52 times [2022-01-18 04:49:43,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:43,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846952740] [2022-01-18 04:49:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:43,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:43,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846952740] [2022-01-18 04:49:43,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846952740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948133129] [2022-01-18 04:49:43,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:49:43,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:43,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:43,612 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) [2022-01-18 04:49:43,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 04:49:43,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:49:43,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:43,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 04:49:43,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:43,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:49:43,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:49:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:43,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:43,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:49:43,886 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 63 treesize of output 59 [2022-01-18 04:49:43,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:49:43,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2022-01-18 04:49:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:43,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948133129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:43,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:43,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 04:49:43,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711696385] [2022-01-18 04:49:43,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:43,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:49:43,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:49:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:49:43,979 INFO L87 Difference]: Start difference. First operand 154 states and 379 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:44,027 INFO L93 Difference]: Finished difference Result 153 states and 370 transitions. [2022-01-18 04:49:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:49:44,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:44,028 INFO L225 Difference]: With dead ends: 153 [2022-01-18 04:49:44,028 INFO L226 Difference]: Without dead ends: 153 [2022-01-18 04:49:44,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:49:44,029 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:44,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 35 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:49:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-18 04:49:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 144. [2022-01-18 04:49:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.4825174825174825) internal successors, (355), 143 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 355 transitions. [2022-01-18 04:49:44,031 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 355 transitions. Word has length 16 [2022-01-18 04:49:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:44,031 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 355 transitions. [2022-01-18 04:49:44,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 355 transitions. [2022-01-18 04:49:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:44,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:44,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:44,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 04:49:44,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:44,247 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1493263183, now seen corresponding path program 53 times [2022-01-18 04:49:44,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:44,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679206375] [2022-01-18 04:49:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:44,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:44,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:44,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679206375] [2022-01-18 04:49:44,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679206375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:44,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044020245] [2022-01-18 04:49:44,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:49:44,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:44,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:44,418 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) [2022-01-18 04:49:44,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 04:49:44,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:49:44,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:44,746 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 99 treesize of output 83 [2022-01-18 04:49:44,748 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 83 treesize of output 67 [2022-01-18 04:49:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:44,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:45,177 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:45,177 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 117 treesize of output 102 [2022-01-18 04:49:45,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-01-18 04:49:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:45,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044020245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:45,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:45,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 04:49:45,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299125706] [2022-01-18 04:49:45,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:45,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:45,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:45,287 INFO L87 Difference]: Start difference. First operand 144 states and 355 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:46,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:46,167 INFO L93 Difference]: Finished difference Result 295 states and 594 transitions. [2022-01-18 04:49:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:49:46,167 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:46,168 INFO L225 Difference]: With dead ends: 295 [2022-01-18 04:49:46,168 INFO L226 Difference]: Without dead ends: 255 [2022-01-18 04:49:46,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:49:46,169 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:46,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 244 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-18 04:49:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 143. [2022-01-18 04:49:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.471830985915493) internal successors, (351), 142 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2022-01-18 04:49:46,172 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 16 [2022-01-18 04:49:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:46,172 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2022-01-18 04:49:46,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2022-01-18 04:49:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:46,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:46,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:46,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 04:49:46,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:46,387 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:46,392 INFO L85 PathProgramCache]: Analyzing trace with hash -655533353, now seen corresponding path program 54 times [2022-01-18 04:49:46,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:46,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802581158] [2022-01-18 04:49:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:46,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:46,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:46,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802581158] [2022-01-18 04:49:46,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802581158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:46,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657605909] [2022-01-18 04:49:46,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:49:46,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:46,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:46,546 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) [2022-01-18 04:49:46,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 04:49:46,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:49:46,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:46,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:46,794 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 101 treesize of output 85 [2022-01-18 04:49:46,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:49:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:47,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:47,392 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:47,392 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 108 treesize of output 95 [2022-01-18 04:49:47,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2022-01-18 04:49:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:49:47,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657605909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:47,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:47,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 04:49:47,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546660127] [2022-01-18 04:49:47,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:47,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:47,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:47,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:47,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:47,508 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:48,829 INFO L93 Difference]: Finished difference Result 284 states and 582 transitions. [2022-01-18 04:49:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:49:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:48,830 INFO L225 Difference]: With dead ends: 284 [2022-01-18 04:49:48,830 INFO L226 Difference]: Without dead ends: 234 [2022-01-18 04:49:48,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:49:48,830 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:48,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 240 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-18 04:49:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 146. [2022-01-18 04:49:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.4827586206896552) internal successors, (360), 145 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 360 transitions. [2022-01-18 04:49:48,833 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 360 transitions. Word has length 16 [2022-01-18 04:49:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:48,833 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 360 transitions. [2022-01-18 04:49:48,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 360 transitions. [2022-01-18 04:49:48,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:48,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:48,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:48,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 04:49:49,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:49,047 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:49,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:49,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1451250767, now seen corresponding path program 55 times [2022-01-18 04:49:49,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:49,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145101706] [2022-01-18 04:49:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:49,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:49,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145101706] [2022-01-18 04:49:49,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145101706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764009704] [2022-01-18 04:49:49,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:49:49,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:49,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:49,213 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) [2022-01-18 04:49:49,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 04:49:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:49,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:49,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-01-18 04:49:49,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:49:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:49,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:50,096 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:49:50,097 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 100 [2022-01-18 04:49:50,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-01-18 04:49:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:50,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764009704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:50,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:50,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 04:49:50,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419586722] [2022-01-18 04:49:50,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:50,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:49:50,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:50,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:49:50,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:49:50,187 INFO L87 Difference]: Start difference. First operand 146 states and 360 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:52,197 INFO L93 Difference]: Finished difference Result 329 states and 673 transitions. [2022-01-18 04:49:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:49:52,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:52,199 INFO L225 Difference]: With dead ends: 329 [2022-01-18 04:49:52,199 INFO L226 Difference]: Without dead ends: 273 [2022-01-18 04:49:52,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 04:49:52,199 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 233 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:52,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 321 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:49:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-18 04:49:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 154. [2022-01-18 04:49:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.477124183006536) internal successors, (379), 153 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) [2022-01-18 04:49:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 379 transitions. [2022-01-18 04:49:52,202 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 379 transitions. Word has length 16 [2022-01-18 04:49:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:52,202 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 379 transitions. [2022-01-18 04:49:52,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 379 transitions. [2022-01-18 04:49:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:52,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:52,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:52,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 04:49:52,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:52,415 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:52,416 INFO L85 PathProgramCache]: Analyzing trace with hash 258940807, now seen corresponding path program 56 times [2022-01-18 04:49:52,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:52,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447188162] [2022-01-18 04:49:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:52,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:52,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:52,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447188162] [2022-01-18 04:49:52,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447188162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:52,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899484431] [2022-01-18 04:49:52,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:49:52,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:52,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:52,676 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) [2022-01-18 04:49:52,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 04:49:52,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:49:52,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:52,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:52,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 04:49:52,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 04:49:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:53,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:53,371 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:53,371 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 121 treesize of output 104 [2022-01-18 04:49:53,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 04:49:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:53,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899484431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:53,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:53,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 04:49:53,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264398914] [2022-01-18 04:49:53,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:53,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:53,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:53,482 INFO L87 Difference]: Start difference. First operand 154 states and 379 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:54,109 INFO L93 Difference]: Finished difference Result 284 states and 606 transitions. [2022-01-18 04:49:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:49:54,110 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:54,111 INFO L225 Difference]: With dead ends: 284 [2022-01-18 04:49:54,111 INFO L226 Difference]: Without dead ends: 259 [2022-01-18 04:49:54,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:49:54,111 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:54,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 217 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:49:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-18 04:49:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 159. [2022-01-18 04:49:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.5063291139240507) internal successors, (396), 158 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 396 transitions. [2022-01-18 04:49:54,114 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 396 transitions. Word has length 16 [2022-01-18 04:49:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:54,114 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 396 transitions. [2022-01-18 04:49:54,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 396 transitions. [2022-01-18 04:49:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:54,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:54,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:54,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 04:49:54,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:54,328 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1956732661, now seen corresponding path program 57 times [2022-01-18 04:49:54,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:54,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960003825] [2022-01-18 04:49:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:54,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:54,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:54,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960003825] [2022-01-18 04:49:54,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960003825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:54,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397179296] [2022-01-18 04:49:54,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:49:54,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:54,492 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) [2022-01-18 04:49:54,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 04:49:54,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:49:54,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:49:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:54,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:49:54,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:49:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:55,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:55,326 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:55,327 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 108 treesize of output 95 [2022-01-18 04:49:55,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2022-01-18 04:49:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:55,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397179296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:55,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:55,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 04:49:55,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162712346] [2022-01-18 04:49:55,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:55,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:55,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:55,435 INFO L87 Difference]: Start difference. First operand 159 states and 396 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:56,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:56,406 INFO L93 Difference]: Finished difference Result 342 states and 707 transitions. [2022-01-18 04:49:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:49:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:56,407 INFO L225 Difference]: With dead ends: 342 [2022-01-18 04:49:56,407 INFO L226 Difference]: Without dead ends: 309 [2022-01-18 04:49:56,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:49:56,408 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:56,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 382 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:49:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-18 04:49:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 157. [2022-01-18 04:49:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.4935897435897436) internal successors, (389), 156 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 389 transitions. [2022-01-18 04:49:56,411 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 389 transitions. Word has length 16 [2022-01-18 04:49:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:56,411 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 389 transitions. [2022-01-18 04:49:56,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 389 transitions. [2022-01-18 04:49:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:56,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:56,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:56,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 04:49:56,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 04:49:56,621 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash 189438099, now seen corresponding path program 58 times [2022-01-18 04:49:56,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:56,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753003805] [2022-01-18 04:49:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:56,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:56,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:56,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753003805] [2022-01-18 04:49:56,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753003805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:56,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046872182] [2022-01-18 04:49:56,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:49:56,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:56,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:56,776 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) [2022-01-18 04:49:56,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 04:49:56,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:49:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:56,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:57,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-01-18 04:49:57,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-01-18 04:49:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:57,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:49:57,549 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:49:57,549 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 106 treesize of output 93 [2022-01-18 04:49:57,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:49:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:57,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046872182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:49:57,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:49:57,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 04:49:57,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142159103] [2022-01-18 04:49:57,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:49:57,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:49:57,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:49:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:49:57,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:49:57,632 INFO L87 Difference]: Start difference. First operand 157 states and 389 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:49:58,928 INFO L93 Difference]: Finished difference Result 325 states and 671 transitions. [2022-01-18 04:49:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:49:58,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:49:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:49:58,930 INFO L225 Difference]: With dead ends: 325 [2022-01-18 04:49:58,930 INFO L226 Difference]: Without dead ends: 282 [2022-01-18 04:49:58,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=304, Invalid=1588, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 04:49:58,930 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 169 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:49:58,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 326 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:49:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-18 04:49:58,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 159. [2022-01-18 04:49:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.4936708860759493) internal successors, (394), 158 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 394 transitions. [2022-01-18 04:49:58,933 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 394 transitions. Word has length 16 [2022-01-18 04:49:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:49:58,933 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 394 transitions. [2022-01-18 04:49:58,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:49:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 394 transitions. [2022-01-18 04:49:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:49:58,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:49:58,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:49:58,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 04:49:59,143 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,SelfDestructingSolverStorable66 [2022-01-18 04:49:59,143 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:49:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:49:59,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1998745077, now seen corresponding path program 59 times [2022-01-18 04:49:59,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:49:59,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934502618] [2022-01-18 04:49:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:49:59,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:49:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:49:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:59,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:49:59,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934502618] [2022-01-18 04:49:59,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934502618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:49:59,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252347290] [2022-01-18 04:49:59,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:49:59,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:49:59,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:49:59,289 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) [2022-01-18 04:49:59,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 04:49:59,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:49:59,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:49:59,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:49:59,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:49:59,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-01-18 04:49:59,533 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 79 treesize of output 63 [2022-01-18 04:49:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:49:59,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:00,168 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:50:00,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 106 [2022-01-18 04:50:00,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 73 [2022-01-18 04:50:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:00,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252347290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:00,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:00,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 04:50:00,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414364996] [2022-01-18 04:50:00,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:00,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:50:00,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:00,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:50:00,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:50:00,236 INFO L87 Difference]: Start difference. First operand 159 states and 394 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:01,242 INFO L93 Difference]: Finished difference Result 265 states and 582 transitions. [2022-01-18 04:50:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:50:01,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:50:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:01,243 INFO L225 Difference]: With dead ends: 265 [2022-01-18 04:50:01,243 INFO L226 Difference]: Without dead ends: 223 [2022-01-18 04:50:01,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 04:50:01,244 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 206 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:01,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 216 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:50:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-18 04:50:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 159. [2022-01-18 04:50:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.4936708860759493) internal successors, (394), 158 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 394 transitions. [2022-01-18 04:50:01,246 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 394 transitions. Word has length 16 [2022-01-18 04:50:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:01,246 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 394 transitions. [2022-01-18 04:50:01,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 394 transitions. [2022-01-18 04:50:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:50:01,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:01,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:01,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 04:50:01,447 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,SelfDestructingSolverStorable67 [2022-01-18 04:50:01,447 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1555845937, now seen corresponding path program 60 times [2022-01-18 04:50:01,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:01,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045866498] [2022-01-18 04:50:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:01,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:01,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:01,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045866498] [2022-01-18 04:50:01,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045866498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:01,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12621970] [2022-01-18 04:50:01,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:50:01,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:01,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:01,636 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) [2022-01-18 04:50:01,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 04:50:01,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:50:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:01,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:50:01,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:01,933 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 101 treesize of output 85 [2022-01-18 04:50:01,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:50:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:02,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:02,681 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:02,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 76 [2022-01-18 04:50:02,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 59 [2022-01-18 04:50:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:02,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12621970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:02,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:02,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 04:50:02,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974799188] [2022-01-18 04:50:02,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:02,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:50:02,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:02,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:50:02,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:50:02,763 INFO L87 Difference]: Start difference. First operand 159 states and 394 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:03,757 INFO L93 Difference]: Finished difference Result 342 states and 775 transitions. [2022-01-18 04:50:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:50:03,757 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:50:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:03,758 INFO L225 Difference]: With dead ends: 342 [2022-01-18 04:50:03,758 INFO L226 Difference]: Without dead ends: 295 [2022-01-18 04:50:03,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:50:03,758 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:03,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 171 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:50:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-18 04:50:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 163. [2022-01-18 04:50:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.493827160493827) internal successors, (404), 162 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 404 transitions. [2022-01-18 04:50:03,761 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 404 transitions. Word has length 16 [2022-01-18 04:50:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:03,761 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 404 transitions. [2022-01-18 04:50:03,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 404 transitions. [2022-01-18 04:50:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:03,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:03,762 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:03,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 04:50:03,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:03,975 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:03,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1610733419, now seen corresponding path program 61 times [2022-01-18 04:50:03,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:03,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938472004] [2022-01-18 04:50:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:03,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:04,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:04,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938472004] [2022-01-18 04:50:04,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938472004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:04,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565019031] [2022-01-18 04:50:04,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:50:04,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:04,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:04,067 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) [2022-01-18 04:50:04,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 04:50:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:04,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:04,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:04,403 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:04,404 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 32 treesize of output 27 [2022-01-18 04:50:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:04,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565019031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:04,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:04,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:04,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233615900] [2022-01-18 04:50:04,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:04,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:04,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:04,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:04,422 INFO L87 Difference]: Start difference. First operand 163 states and 404 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:04,677 INFO L93 Difference]: Finished difference Result 224 states and 526 transitions. [2022-01-18 04:50:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:50:04,678 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:04,678 INFO L225 Difference]: With dead ends: 224 [2022-01-18 04:50:04,678 INFO L226 Difference]: Without dead ends: 224 [2022-01-18 04:50:04,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:50:04,679 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:04,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 111 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:04,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-18 04:50:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 161. [2022-01-18 04:50:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.50625) internal successors, (401), 160 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 401 transitions. [2022-01-18 04:50:04,686 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 401 transitions. Word has length 17 [2022-01-18 04:50:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:04,686 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 401 transitions. [2022-01-18 04:50:04,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 401 transitions. [2022-01-18 04:50:04,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:04,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:04,687 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:04,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:04,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 04:50:04,899 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:04,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1355536457, now seen corresponding path program 62 times [2022-01-18 04:50:04,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:04,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554679517] [2022-01-18 04:50:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:04,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:04,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:04,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554679517] [2022-01-18 04:50:04,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554679517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:04,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408083200] [2022-01-18 04:50:04,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:50:04,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:04,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:04,983 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) [2022-01-18 04:50:04,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 04:50:05,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:50:05,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:05,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:05,361 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:05,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2022-01-18 04:50:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:05,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408083200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:05,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:05,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:05,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454606428] [2022-01-18 04:50:05,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:05,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:05,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:05,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:05,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:05,381 INFO L87 Difference]: Start difference. First operand 161 states and 401 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:05,783 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2022-01-18 04:50:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:50:05,783 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:05,784 INFO L225 Difference]: With dead ends: 225 [2022-01-18 04:50:05,784 INFO L226 Difference]: Without dead ends: 225 [2022-01-18 04:50:05,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:50:05,784 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:05,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 156 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-18 04:50:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 160. [2022-01-18 04:50:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.50314465408805) internal successors, (398), 159 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 398 transitions. [2022-01-18 04:50:05,787 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 398 transitions. Word has length 17 [2022-01-18 04:50:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:05,787 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 398 transitions. [2022-01-18 04:50:05,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 398 transitions. [2022-01-18 04:50:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:05,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:05,787 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:05,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:06,003 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1503702455, now seen corresponding path program 63 times [2022-01-18 04:50:06,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:06,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986642490] [2022-01-18 04:50:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:06,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:06,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:06,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986642490] [2022-01-18 04:50:06,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986642490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:06,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374559631] [2022-01-18 04:50:06,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:50:06,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:06,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:06,094 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) [2022-01-18 04:50:06,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 04:50:06,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:50:06,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:50:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:06,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:50:06,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 37 [2022-01-18 04:50:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:06,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:06,637 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-01-18 04:50:06,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 43 [2022-01-18 04:50:06,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 11 [2022-01-18 04:50:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:06,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374559631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:06,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:06,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 04:50:06,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277828425] [2022-01-18 04:50:06,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:06,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:50:06,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:06,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:50:06,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:50:06,646 INFO L87 Difference]: Start difference. First operand 160 states and 398 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:07,097 INFO L93 Difference]: Finished difference Result 241 states and 547 transitions. [2022-01-18 04:50:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:50:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:07,098 INFO L225 Difference]: With dead ends: 241 [2022-01-18 04:50:07,098 INFO L226 Difference]: Without dead ends: 237 [2022-01-18 04:50:07,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:50:07,098 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 151 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:07,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 113 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-18 04:50:07,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 168. [2022-01-18 04:50:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4910179640718564) internal successors, (416), 167 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 416 transitions. [2022-01-18 04:50:07,101 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 416 transitions. Word has length 17 [2022-01-18 04:50:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:07,101 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 416 transitions. [2022-01-18 04:50:07,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 416 transitions. [2022-01-18 04:50:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:07,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:07,101 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:07,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:07,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:07,302 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:07,302 INFO L85 PathProgramCache]: Analyzing trace with hash 751247663, now seen corresponding path program 64 times [2022-01-18 04:50:07,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:07,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14013640] [2022-01-18 04:50:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:07,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:07,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:07,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14013640] [2022-01-18 04:50:07,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14013640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:07,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798470418] [2022-01-18 04:50:07,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:50:07,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:07,398 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) [2022-01-18 04:50:07,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 04:50:07,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:50:07,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:07,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:07,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:07,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:07,787 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:07,787 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 30 treesize of output 25 [2022-01-18 04:50:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:07,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798470418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:07,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:07,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 04:50:07,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689688679] [2022-01-18 04:50:07,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:07,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:50:07,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:50:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:50:07,795 INFO L87 Difference]: Start difference. First operand 168 states and 416 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:07,981 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2022-01-18 04:50:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:50:07,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:07,982 INFO L225 Difference]: With dead ends: 224 [2022-01-18 04:50:07,982 INFO L226 Difference]: Without dead ends: 224 [2022-01-18 04:50:07,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:50:07,982 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:07,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 115 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-18 04:50:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 168. [2022-01-18 04:50:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4910179640718564) internal successors, (416), 167 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 416 transitions. [2022-01-18 04:50:07,985 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 416 transitions. Word has length 17 [2022-01-18 04:50:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:07,985 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 416 transitions. [2022-01-18 04:50:07,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 416 transitions. [2022-01-18 04:50:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:07,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:07,986 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:08,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 04:50:08,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:08,192 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1537301683, now seen corresponding path program 65 times [2022-01-18 04:50:08,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:08,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266116166] [2022-01-18 04:50:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:08,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:08,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266116166] [2022-01-18 04:50:08,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266116166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275719091] [2022-01-18 04:50:08,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:50:08,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:08,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:08,281 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) [2022-01-18 04:50:08,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 04:50:08,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:50:08,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:08,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:50:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:08,561 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 98 treesize of output 82 [2022-01-18 04:50:08,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:50:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:08,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:08,769 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:08,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2022-01-18 04:50:08,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 04:50:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:08,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275719091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:08,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:08,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 04:50:08,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702340824] [2022-01-18 04:50:08,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:08,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:50:08,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:50:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:50:08,815 INFO L87 Difference]: Start difference. First operand 168 states and 416 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:09,076 INFO L93 Difference]: Finished difference Result 220 states and 512 transitions. [2022-01-18 04:50:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:50:09,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:09,077 INFO L225 Difference]: With dead ends: 220 [2022-01-18 04:50:09,077 INFO L226 Difference]: Without dead ends: 218 [2022-01-18 04:50:09,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:50:09,078 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:09,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 111 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-18 04:50:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 164. [2022-01-18 04:50:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.496932515337423) internal successors, (407), 163 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2022-01-18 04:50:09,080 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 17 [2022-01-18 04:50:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:09,080 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2022-01-18 04:50:09,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2022-01-18 04:50:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:09,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:09,081 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:09,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 04:50:09,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-01-18 04:50:09,287 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash 681744955, now seen corresponding path program 66 times [2022-01-18 04:50:09,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:09,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368773671] [2022-01-18 04:50:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:09,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:09,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:09,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368773671] [2022-01-18 04:50:09,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368773671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:09,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900425244] [2022-01-18 04:50:09,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:50:09,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:09,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:09,370 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) [2022-01-18 04:50:09,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 04:50:09,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:50:09,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:09,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:09,595 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 89 treesize of output 73 [2022-01-18 04:50:09,596 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 73 treesize of output 57 [2022-01-18 04:50:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:09,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:09,811 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:09,811 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 30 treesize of output 25 [2022-01-18 04:50:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:09,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900425244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:09,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:09,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:09,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621839777] [2022-01-18 04:50:09,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:09,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:09,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:09,830 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:10,041 INFO L93 Difference]: Finished difference Result 220 states and 516 transitions. [2022-01-18 04:50:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:50:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:10,043 INFO L225 Difference]: With dead ends: 220 [2022-01-18 04:50:10,043 INFO L226 Difference]: Without dead ends: 217 [2022-01-18 04:50:10,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:50:10,043 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:10,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 86 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-18 04:50:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 164. [2022-01-18 04:50:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.4907975460122698) internal successors, (406), 163 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2022-01-18 04:50:10,046 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 17 [2022-01-18 04:50:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:10,046 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2022-01-18 04:50:10,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2022-01-18 04:50:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:10,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:10,047 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:10,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:10,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 04:50:10,247 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash -678371785, now seen corresponding path program 67 times [2022-01-18 04:50:10,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:10,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094245029] [2022-01-18 04:50:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:10,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:10,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:10,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094245029] [2022-01-18 04:50:10,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094245029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:10,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038993891] [2022-01-18 04:50:10,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:50:10,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:10,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:10,341 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) [2022-01-18 04:50:10,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 04:50:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:10,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:10,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:50:10,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:50:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:10,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:10,766 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:10,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2022-01-18 04:50:10,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 04:50:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:10,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038993891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:10,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:10,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:10,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777405434] [2022-01-18 04:50:10,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:10,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:10,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:10,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:10,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:10,800 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:11,018 INFO L93 Difference]: Finished difference Result 204 states and 487 transitions. [2022-01-18 04:50:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:50:11,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:11,019 INFO L225 Difference]: With dead ends: 204 [2022-01-18 04:50:11,019 INFO L226 Difference]: Without dead ends: 204 [2022-01-18 04:50:11,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:50:11,020 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:11,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 99 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-18 04:50:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 161. [2022-01-18 04:50:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.49375) internal successors, (399), 160 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 399 transitions. [2022-01-18 04:50:11,022 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 399 transitions. Word has length 17 [2022-01-18 04:50:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:11,022 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 399 transitions. [2022-01-18 04:50:11,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 399 transitions. [2022-01-18 04:50:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:11,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:11,023 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:11,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:11,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-01-18 04:50:11,235 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1020834773, now seen corresponding path program 68 times [2022-01-18 04:50:11,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:11,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833227235] [2022-01-18 04:50:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:11,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:11,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:11,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833227235] [2022-01-18 04:50:11,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833227235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:11,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388456352] [2022-01-18 04:50:11,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:50:11,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:11,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:11,322 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) [2022-01-18 04:50:11,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 04:50:11,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:50:11,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:11,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:11,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:11,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:50:11,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:11,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:50:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:11,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388456352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:11,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:11,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:11,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488984218] [2022-01-18 04:50:11,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:11,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:11,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:11,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:11,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:11,741 INFO L87 Difference]: Start difference. First operand 161 states and 399 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:11,949 INFO L93 Difference]: Finished difference Result 186 states and 448 transitions. [2022-01-18 04:50:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:50:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:11,950 INFO L225 Difference]: With dead ends: 186 [2022-01-18 04:50:11,950 INFO L226 Difference]: Without dead ends: 186 [2022-01-18 04:50:11,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:50:11,950 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:11,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 98 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-18 04:50:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2022-01-18 04:50:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.49375) internal successors, (399), 160 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 399 transitions. [2022-01-18 04:50:11,952 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 399 transitions. Word has length 17 [2022-01-18 04:50:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:11,952 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 399 transitions. [2022-01-18 04:50:11,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 399 transitions. [2022-01-18 04:50:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:11,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:11,953 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:11,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 04:50:12,155 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,SelfDestructingSolverStorable76 [2022-01-18 04:50:12,156 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:12,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1085949347, now seen corresponding path program 69 times [2022-01-18 04:50:12,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:12,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591429741] [2022-01-18 04:50:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:12,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:12,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:12,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591429741] [2022-01-18 04:50:12,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591429741] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:12,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019898125] [2022-01-18 04:50:12,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:50:12,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:12,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:12,249 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) [2022-01-18 04:50:12,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 04:50:12,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:50:12,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:12,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:12,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:12,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:12,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:12,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:50:12,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:12,599 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 30 treesize of output 28 [2022-01-18 04:50:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:12,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019898125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:12,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:12,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:12,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199856344] [2022-01-18 04:50:12,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:12,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:12,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:12,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:12,645 INFO L87 Difference]: Start difference. First operand 161 states and 399 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:12,754 INFO L93 Difference]: Finished difference Result 190 states and 457 transitions. [2022-01-18 04:50:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:50:12,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:12,755 INFO L225 Difference]: With dead ends: 190 [2022-01-18 04:50:12,755 INFO L226 Difference]: Without dead ends: 190 [2022-01-18 04:50:12,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:12,755 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:12,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-18 04:50:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 161. [2022-01-18 04:50:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.49375) internal successors, (399), 160 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 399 transitions. [2022-01-18 04:50:12,757 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 399 transitions. Word has length 17 [2022-01-18 04:50:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:12,757 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 399 transitions. [2022-01-18 04:50:12,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 399 transitions. [2022-01-18 04:50:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:12,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:12,758 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:12,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 04:50:12,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:12,958 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:12,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1872003367, now seen corresponding path program 70 times [2022-01-18 04:50:12,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:12,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740441638] [2022-01-18 04:50:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:12,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:13,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740441638] [2022-01-18 04:50:13,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740441638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498874490] [2022-01-18 04:50:13,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:50:13,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:13,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:13,057 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) [2022-01-18 04:50:13,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 04:50:13,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:50:13,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:13,271 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 96 treesize of output 80 [2022-01-18 04:50:13,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:50:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:13,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:13,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:13,442 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 73 treesize of output 67 [2022-01-18 04:50:13,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:13,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 51 [2022-01-18 04:50:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:13,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498874490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:13,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:13,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:13,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12749919] [2022-01-18 04:50:13,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:13,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:13,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:13,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:13,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:13,533 INFO L87 Difference]: Start difference. First operand 161 states and 399 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:13,630 INFO L93 Difference]: Finished difference Result 174 states and 425 transitions. [2022-01-18 04:50:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:50:13,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:13,631 INFO L225 Difference]: With dead ends: 174 [2022-01-18 04:50:13,631 INFO L226 Difference]: Without dead ends: 174 [2022-01-18 04:50:13,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:13,631 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:13,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 61 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-18 04:50:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2022-01-18 04:50:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.4842767295597485) internal successors, (395), 159 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2022-01-18 04:50:13,633 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 17 [2022-01-18 04:50:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:13,634 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2022-01-18 04:50:13,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2022-01-18 04:50:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:13,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:13,634 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:13,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:13,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:13,835 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:13,835 INFO L85 PathProgramCache]: Analyzing trace with hash -123006997, now seen corresponding path program 71 times [2022-01-18 04:50:13,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:13,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321839616] [2022-01-18 04:50:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:13,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:13,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321839616] [2022-01-18 04:50:13,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321839616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182059059] [2022-01-18 04:50:13,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:50:13,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:13,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:13,931 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) [2022-01-18 04:50:13,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 04:50:13,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:50:13,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:13,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:13,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:14,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:14,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:14,274 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 34 treesize of output 34 [2022-01-18 04:50:14,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:14,279 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 26 treesize of output 26 [2022-01-18 04:50:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:14,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182059059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:14,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:14,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:14,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733057916] [2022-01-18 04:50:14,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:14,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:14,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:14,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:14,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:14,333 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:14,651 INFO L93 Difference]: Finished difference Result 231 states and 532 transitions. [2022-01-18 04:50:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:50:14,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:14,652 INFO L225 Difference]: With dead ends: 231 [2022-01-18 04:50:14,652 INFO L226 Difference]: Without dead ends: 231 [2022-01-18 04:50:14,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:50:14,652 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:14,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 167 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-18 04:50:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2022-01-18 04:50:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.5185185185185186) internal successors, (408), 162 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 408 transitions. [2022-01-18 04:50:14,654 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 408 transitions. Word has length 17 [2022-01-18 04:50:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:14,655 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 408 transitions. [2022-01-18 04:50:14,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 408 transitions. [2022-01-18 04:50:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:14,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:14,655 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:14,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:14,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 04:50:14,870 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:14,871 INFO L85 PathProgramCache]: Analyzing trace with hash -192509705, now seen corresponding path program 72 times [2022-01-18 04:50:14,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:14,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596581766] [2022-01-18 04:50:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:14,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:14,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596581766] [2022-01-18 04:50:14,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596581766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153776685] [2022-01-18 04:50:14,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:50:14,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:14,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:14,992 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) [2022-01-18 04:50:14,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 04:50:15,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:50:15,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:15,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:15,217 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 87 treesize of output 71 [2022-01-18 04:50:15,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:50:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:15,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:15,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:15,395 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 34 treesize of output 34 [2022-01-18 04:50:15,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:15,400 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 26 treesize of output 26 [2022-01-18 04:50:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:15,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153776685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:15,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:15,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:15,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065975713] [2022-01-18 04:50:15,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:15,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:15,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:15,469 INFO L87 Difference]: Start difference. First operand 163 states and 408 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:15,976 INFO L93 Difference]: Finished difference Result 254 states and 588 transitions. [2022-01-18 04:50:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:50:15,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:15,977 INFO L225 Difference]: With dead ends: 254 [2022-01-18 04:50:15,977 INFO L226 Difference]: Without dead ends: 254 [2022-01-18 04:50:15,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 04:50:15,978 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:15,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 162 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-18 04:50:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 177. [2022-01-18 04:50:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5454545454545454) internal successors, (448), 176 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 448 transitions. [2022-01-18 04:50:15,985 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 448 transitions. Word has length 17 [2022-01-18 04:50:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:15,985 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 448 transitions. [2022-01-18 04:50:15,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 448 transitions. [2022-01-18 04:50:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:15,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:15,985 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:16,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:16,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:16,186 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1537165649, now seen corresponding path program 73 times [2022-01-18 04:50:16,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:16,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062506550] [2022-01-18 04:50:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:16,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:16,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:16,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062506550] [2022-01-18 04:50:16,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062506550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:16,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048029202] [2022-01-18 04:50:16,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:50:16,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:16,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:16,325 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) [2022-01-18 04:50:16,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 04:50:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:16,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:50:16,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:16,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 04:50:16,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:50:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:16,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:16,796 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 04:50:16,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2022-01-18 04:50:16,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:50:16,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:16,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 41 [2022-01-18 04:50:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:16,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048029202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:16,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:16,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:16,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691004743] [2022-01-18 04:50:16,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:16,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:16,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:16,919 INFO L87 Difference]: Start difference. First operand 177 states and 448 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:17,525 INFO L93 Difference]: Finished difference Result 304 states and 699 transitions. [2022-01-18 04:50:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:50:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:17,526 INFO L225 Difference]: With dead ends: 304 [2022-01-18 04:50:17,526 INFO L226 Difference]: Without dead ends: 304 [2022-01-18 04:50:17,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:50:17,527 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 154 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:17,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 162 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-18 04:50:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 185. [2022-01-18 04:50:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5760869565217392) internal successors, (474), 184 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 474 transitions. [2022-01-18 04:50:17,530 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 474 transitions. Word has length 17 [2022-01-18 04:50:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:17,530 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 474 transitions. [2022-01-18 04:50:17,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 474 transitions. [2022-01-18 04:50:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:17,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:17,530 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:17,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 04:50:17,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:17,735 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash 569618471, now seen corresponding path program 74 times [2022-01-18 04:50:17,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:17,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332736233] [2022-01-18 04:50:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:17,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:17,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:17,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332736233] [2022-01-18 04:50:17,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332736233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:17,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992419220] [2022-01-18 04:50:17,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:50:17,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:17,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:17,888 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) [2022-01-18 04:50:17,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 04:50:17,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:50:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:17,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:18,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:50:18,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:50:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:18,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:18,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:18,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 34 [2022-01-18 04:50:18,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:18,310 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 26 treesize of output 26 [2022-01-18 04:50:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:18,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992419220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:18,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:18,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:18,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721012660] [2022-01-18 04:50:18,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:18,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:18,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:18,370 INFO L87 Difference]: Start difference. First operand 185 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:18,714 INFO L93 Difference]: Finished difference Result 299 states and 701 transitions. [2022-01-18 04:50:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:50:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:18,715 INFO L225 Difference]: With dead ends: 299 [2022-01-18 04:50:18,715 INFO L226 Difference]: Without dead ends: 297 [2022-01-18 04:50:18,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:50:18,716 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:18,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 157 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-18 04:50:18,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 187. [2022-01-18 04:50:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.5591397849462365) internal successors, (476), 186 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 476 transitions. [2022-01-18 04:50:18,718 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 476 transitions. Word has length 17 [2022-01-18 04:50:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:18,719 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 476 transitions. [2022-01-18 04:50:18,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 476 transitions. [2022-01-18 04:50:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:18,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:18,719 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:18,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 04:50:18,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:18,927 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1579178065, now seen corresponding path program 75 times [2022-01-18 04:50:18,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:18,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003294325] [2022-01-18 04:50:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:18,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:19,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003294325] [2022-01-18 04:50:19,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003294325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365842398] [2022-01-18 04:50:19,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:50:19,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:19,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:19,031 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) [2022-01-18 04:50:19,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 04:50:19,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:50:19,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:19,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:19,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:19,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:19,351 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 33 treesize of output 33 [2022-01-18 04:50:19,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:19,357 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 25 treesize of output 25 [2022-01-18 04:50:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:19,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365842398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:19,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:19,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:19,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167261688] [2022-01-18 04:50:19,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:19,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:19,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:19,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:19,416 INFO L87 Difference]: Start difference. First operand 187 states and 476 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:19,658 INFO L93 Difference]: Finished difference Result 262 states and 614 transitions. [2022-01-18 04:50:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:50:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:19,659 INFO L225 Difference]: With dead ends: 262 [2022-01-18 04:50:19,659 INFO L226 Difference]: Without dead ends: 262 [2022-01-18 04:50:19,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:50:19,659 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:19,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 114 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-18 04:50:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 186. [2022-01-18 04:50:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.562162162162162) internal successors, (474), 185 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 474 transitions. [2022-01-18 04:50:19,662 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 474 transitions. Word has length 17 [2022-01-18 04:50:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:19,662 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 474 transitions. [2022-01-18 04:50:19,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 474 transitions. [2022-01-18 04:50:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:19,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:19,662 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:19,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:19,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 04:50:19,874 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash 252098935, now seen corresponding path program 76 times [2022-01-18 04:50:19,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:19,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949360684] [2022-01-18 04:50:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:19,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:19,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949360684] [2022-01-18 04:50:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949360684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707595165] [2022-01-18 04:50:19,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:50:19,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:19,958 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) [2022-01-18 04:50:19,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 04:50:19,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:50:19,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:19,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:20,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:20,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:20,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:50:20,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:20,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:50:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:20,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707595165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:20,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:20,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:20,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230523055] [2022-01-18 04:50:20,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:20,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:20,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:20,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:20,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:20,439 INFO L87 Difference]: Start difference. First operand 186 states and 474 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:20,650 INFO L93 Difference]: Finished difference Result 220 states and 542 transitions. [2022-01-18 04:50:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:50:20,650 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:20,651 INFO L225 Difference]: With dead ends: 220 [2022-01-18 04:50:20,651 INFO L226 Difference]: Without dead ends: 220 [2022-01-18 04:50:20,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:50:20,651 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:20,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 119 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-18 04:50:20,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 187. [2022-01-18 04:50:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.564516129032258) internal successors, (477), 186 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 477 transitions. [2022-01-18 04:50:20,654 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 477 transitions. Word has length 17 [2022-01-18 04:50:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:20,654 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 477 transitions. [2022-01-18 04:50:20,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 477 transitions. [2022-01-18 04:50:20,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:20,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:20,654 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:20,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 04:50:20,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:20,869 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1936084241, now seen corresponding path program 77 times [2022-01-18 04:50:20,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:20,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267930117] [2022-01-18 04:50:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:20,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:20,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:20,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267930117] [2022-01-18 04:50:20,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267930117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:20,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436789663] [2022-01-18 04:50:20,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:50:20,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:20,971 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) [2022-01-18 04:50:20,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 04:50:21,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:50:21,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:21,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:21,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:21,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:21,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:50:21,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:21,359 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 30 treesize of output 28 [2022-01-18 04:50:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:21,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436789663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:21,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:21,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:21,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951247286] [2022-01-18 04:50:21,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:21,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:21,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:21,411 INFO L87 Difference]: Start difference. First operand 187 states and 477 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:21,807 INFO L93 Difference]: Finished difference Result 232 states and 569 transitions. [2022-01-18 04:50:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:50:21,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:21,808 INFO L225 Difference]: With dead ends: 232 [2022-01-18 04:50:21,808 INFO L226 Difference]: Without dead ends: 232 [2022-01-18 04:50:21,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:50:21,809 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:21,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 115 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-18 04:50:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 188. [2022-01-18 04:50:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5668449197860963) internal successors, (480), 187 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 480 transitions. [2022-01-18 04:50:21,811 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 480 transitions. Word has length 17 [2022-01-18 04:50:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:21,811 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 480 transitions. [2022-01-18 04:50:21,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 480 transitions. [2022-01-18 04:50:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:21,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:21,812 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:21,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 04:50:22,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:22,012 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1150030221, now seen corresponding path program 78 times [2022-01-18 04:50:22,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:22,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624759047] [2022-01-18 04:50:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:22,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:22,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:22,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624759047] [2022-01-18 04:50:22,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624759047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:22,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923637300] [2022-01-18 04:50:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:50:22,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:22,121 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) [2022-01-18 04:50:22,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 04:50:22,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:50:22,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:22,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:50:22,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:50:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:22,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:22,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:22,504 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 73 treesize of output 67 [2022-01-18 04:50:22,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:22,510 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 57 treesize of output 51 [2022-01-18 04:50:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:22,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923637300] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:22,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:22,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:22,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8375022] [2022-01-18 04:50:22,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:22,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:22,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:22,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:22,622 INFO L87 Difference]: Start difference. First operand 188 states and 480 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:22,853 INFO L93 Difference]: Finished difference Result 254 states and 581 transitions. [2022-01-18 04:50:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:50:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:22,854 INFO L225 Difference]: With dead ends: 254 [2022-01-18 04:50:22,854 INFO L226 Difference]: Without dead ends: 252 [2022-01-18 04:50:22,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:50:22,854 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 76 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:22,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 224 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-18 04:50:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 178. [2022-01-18 04:50:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.542372881355932) internal successors, (450), 177 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 450 transitions. [2022-01-18 04:50:22,857 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 450 transitions. Word has length 17 [2022-01-18 04:50:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:22,857 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 450 transitions. [2022-01-18 04:50:22,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 450 transitions. [2022-01-18 04:50:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:22,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:22,857 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:22,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:23,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:23,058 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:23,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1455097681, now seen corresponding path program 79 times [2022-01-18 04:50:23,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:23,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521235671] [2022-01-18 04:50:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:23,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:23,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521235671] [2022-01-18 04:50:23,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521235671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109951923] [2022-01-18 04:50:23,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:50:23,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:23,174 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) [2022-01-18 04:50:23,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 04:50:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:23,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:23,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:23,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:23,520 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 34 treesize of output 34 [2022-01-18 04:50:23,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:23,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 04:50:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:23,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109951923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:23,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:23,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:23,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988084995] [2022-01-18 04:50:23,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:23,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:23,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:23,598 INFO L87 Difference]: Start difference. First operand 178 states and 450 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:23,716 INFO L93 Difference]: Finished difference Result 208 states and 510 transitions. [2022-01-18 04:50:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:50:23,716 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:23,717 INFO L225 Difference]: With dead ends: 208 [2022-01-18 04:50:23,717 INFO L226 Difference]: Without dead ends: 208 [2022-01-18 04:50:23,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:23,717 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:23,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-18 04:50:23,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 178. [2022-01-18 04:50:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.542372881355932) internal successors, (450), 177 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 450 transitions. [2022-01-18 04:50:23,720 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 450 transitions. Word has length 17 [2022-01-18 04:50:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:23,720 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 450 transitions. [2022-01-18 04:50:23,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 450 transitions. [2022-01-18 04:50:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:23,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:23,720 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:23,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:23,921 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,SelfDestructingSolverStorable87 [2022-01-18 04:50:23,921 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1425710963, now seen corresponding path program 80 times [2022-01-18 04:50:23,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:23,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001715828] [2022-01-18 04:50:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:23,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:24,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:24,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001715828] [2022-01-18 04:50:24,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001715828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:24,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929174158] [2022-01-18 04:50:24,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:50:24,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:24,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:24,034 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) [2022-01-18 04:50:24,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 04:50:24,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:50:24,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:24,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:24,233 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 96 treesize of output 80 [2022-01-18 04:50:24,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:50:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:24,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:24,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:24,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2022-01-18 04:50:24,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:24,393 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 53 treesize of output 49 [2022-01-18 04:50:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:24,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929174158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:24,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:24,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:24,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267481880] [2022-01-18 04:50:24,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:24,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:24,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:24,506 INFO L87 Difference]: Start difference. First operand 178 states and 450 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:25,041 INFO L93 Difference]: Finished difference Result 324 states and 722 transitions. [2022-01-18 04:50:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:50:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:25,044 INFO L225 Difference]: With dead ends: 324 [2022-01-18 04:50:25,044 INFO L226 Difference]: Without dead ends: 322 [2022-01-18 04:50:25,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:50:25,044 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:25,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 216 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-18 04:50:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 185. [2022-01-18 04:50:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5760869565217392) internal successors, (474), 184 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 474 transitions. [2022-01-18 04:50:25,047 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 474 transitions. Word has length 17 [2022-01-18 04:50:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:25,047 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 474 transitions. [2022-01-18 04:50:25,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 474 transitions. [2022-01-18 04:50:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:25,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:25,047 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:25,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:25,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-01-18 04:50:25,248 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:25,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash -762472213, now seen corresponding path program 81 times [2022-01-18 04:50:25,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:25,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963964108] [2022-01-18 04:50:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:25,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:25,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:25,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963964108] [2022-01-18 04:50:25,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963964108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:25,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695160788] [2022-01-18 04:50:25,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:50:25,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:25,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:25,383 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) [2022-01-18 04:50:25,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 04:50:25,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:50:25,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:50:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:25,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:25,687 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 62 treesize of output 58 [2022-01-18 04:50:25,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:25,693 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 50 treesize of output 46 [2022-01-18 04:50:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:25,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:26,439 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-01-18 04:50:26,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 98 [2022-01-18 04:50:26,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:26,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 71 [2022-01-18 04:50:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:26,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695160788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:26,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:26,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 24 [2022-01-18 04:50:26,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380697420] [2022-01-18 04:50:26,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:26,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:50:26,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:50:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:50:26,637 INFO L87 Difference]: Start difference. First operand 185 states and 474 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:27,936 INFO L93 Difference]: Finished difference Result 359 states and 771 transitions. [2022-01-18 04:50:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:50:27,940 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:27,941 INFO L225 Difference]: With dead ends: 359 [2022-01-18 04:50:27,941 INFO L226 Difference]: Without dead ends: 343 [2022-01-18 04:50:27,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 04:50:27,942 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 263 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:27,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 271 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:50:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-18 04:50:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 190. [2022-01-18 04:50:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.6031746031746033) internal successors, (492), 189 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 492 transitions. [2022-01-18 04:50:27,945 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 492 transitions. Word has length 17 [2022-01-18 04:50:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:27,945 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 492 transitions. [2022-01-18 04:50:27,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 492 transitions. [2022-01-18 04:50:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:27,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:27,945 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:27,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 04:50:28,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 04:50:28,159 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1383698547, now seen corresponding path program 82 times [2022-01-18 04:50:28,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:28,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423125608] [2022-01-18 04:50:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:28,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:28,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:28,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423125608] [2022-01-18 04:50:28,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423125608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:28,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381475133] [2022-01-18 04:50:28,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:50:28,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:28,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:28,297 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) [2022-01-18 04:50:28,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 04:50:28,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:50:28,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:28,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:50:28,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:28,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:28,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:28,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-01-18 04:50:28,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:28,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 04:50:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:28,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381475133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:28,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:28,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:28,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995187919] [2022-01-18 04:50:28,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:28,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:28,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:28,738 INFO L87 Difference]: Start difference. First operand 190 states and 492 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:29,117 INFO L93 Difference]: Finished difference Result 269 states and 636 transitions. [2022-01-18 04:50:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:50:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:29,118 INFO L225 Difference]: With dead ends: 269 [2022-01-18 04:50:29,118 INFO L226 Difference]: Without dead ends: 269 [2022-01-18 04:50:29,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:50:29,119 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:29,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 177 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-18 04:50:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 188. [2022-01-18 04:50:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.6149732620320854) internal successors, (489), 187 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 489 transitions. [2022-01-18 04:50:29,121 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 489 transitions. Word has length 17 [2022-01-18 04:50:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:29,121 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 489 transitions. [2022-01-18 04:50:29,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 489 transitions. [2022-01-18 04:50:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:29,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:29,122 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:29,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 04:50:29,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:29,322 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 123326067, now seen corresponding path program 83 times [2022-01-18 04:50:29,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:29,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940586821] [2022-01-18 04:50:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:29,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:29,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:29,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940586821] [2022-01-18 04:50:29,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940586821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:29,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143406922] [2022-01-18 04:50:29,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:50:29,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:29,420 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) [2022-01-18 04:50:29,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 04:50:29,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:50:29,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:29,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:29,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:29,616 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 87 treesize of output 71 [2022-01-18 04:50:29,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:50:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:29,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:29,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:29,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-18 04:50:29,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:29,817 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 04:50:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:29,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143406922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:29,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:29,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:29,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195386841] [2022-01-18 04:50:29,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:29,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:29,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:29,878 INFO L87 Difference]: Start difference. First operand 188 states and 489 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:30,381 INFO L93 Difference]: Finished difference Result 264 states and 647 transitions. [2022-01-18 04:50:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:50:30,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:30,382 INFO L225 Difference]: With dead ends: 264 [2022-01-18 04:50:30,382 INFO L226 Difference]: Without dead ends: 262 [2022-01-18 04:50:30,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:50:30,383 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:30,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 115 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-18 04:50:30,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 197. [2022-01-18 04:50:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.6122448979591835) internal successors, (512), 196 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 512 transitions. [2022-01-18 04:50:30,385 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 512 transitions. Word has length 17 [2022-01-18 04:50:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:30,385 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 512 transitions. [2022-01-18 04:50:30,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 512 transitions. [2022-01-18 04:50:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:30,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:30,386 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:30,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:30,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:30,586 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2025470469, now seen corresponding path program 84 times [2022-01-18 04:50:30,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:30,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667477673] [2022-01-18 04:50:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:30,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:30,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:30,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667477673] [2022-01-18 04:50:30,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667477673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:30,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662683626] [2022-01-18 04:50:30,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:50:30,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:30,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:30,687 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) [2022-01-18 04:50:30,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 04:50:30,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:50:30,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:30,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:30,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:30,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:31,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:31,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:50:31,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:31,047 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 30 treesize of output 28 [2022-01-18 04:50:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:31,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662683626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:31,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:31,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:31,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315695038] [2022-01-18 04:50:31,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:31,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:31,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:31,114 INFO L87 Difference]: Start difference. First operand 197 states and 512 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:31,514 INFO L93 Difference]: Finished difference Result 248 states and 617 transitions. [2022-01-18 04:50:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:50:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:31,515 INFO L225 Difference]: With dead ends: 248 [2022-01-18 04:50:31,515 INFO L226 Difference]: Without dead ends: 248 [2022-01-18 04:50:31,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:50:31,516 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:31,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 93 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-18 04:50:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 196. [2022-01-18 04:50:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6102564102564103) internal successors, (509), 195 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 509 transitions. [2022-01-18 04:50:31,523 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 509 transitions. Word has length 17 [2022-01-18 04:50:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:31,523 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 509 transitions. [2022-01-18 04:50:31,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 509 transitions. [2022-01-18 04:50:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:31,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:31,523 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:31,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:31,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:31,724 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash 81313651, now seen corresponding path program 85 times [2022-01-18 04:50:31,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:31,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966333708] [2022-01-18 04:50:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:31,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:31,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:31,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966333708] [2022-01-18 04:50:31,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966333708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:31,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014146172] [2022-01-18 04:50:31,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:50:31,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:31,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:31,829 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) [2022-01-18 04:50:31,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 04:50:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:31,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:31,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:32,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:32,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:32,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:50:32,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:32,190 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 30 treesize of output 28 [2022-01-18 04:50:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:32,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014146172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:32,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:32,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:32,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705031519] [2022-01-18 04:50:32,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:32,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:32,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:32,249 INFO L87 Difference]: Start difference. First operand 196 states and 509 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:32,555 INFO L93 Difference]: Finished difference Result 242 states and 601 transitions. [2022-01-18 04:50:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:50:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:32,556 INFO L225 Difference]: With dead ends: 242 [2022-01-18 04:50:32,556 INFO L226 Difference]: Without dead ends: 242 [2022-01-18 04:50:32,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:50:32,557 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:32,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 134 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-18 04:50:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 192. [2022-01-18 04:50:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.612565445026178) internal successors, (499), 191 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 499 transitions. [2022-01-18 04:50:32,559 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 499 transitions. Word has length 17 [2022-01-18 04:50:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:32,559 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 499 transitions. [2022-01-18 04:50:32,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 499 transitions. [2022-01-18 04:50:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:32,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:32,560 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:32,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-01-18 04:50:32,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:32,760 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash 789591791, now seen corresponding path program 86 times [2022-01-18 04:50:32,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:32,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942544337] [2022-01-18 04:50:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:32,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:32,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:32,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942544337] [2022-01-18 04:50:32,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942544337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:32,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387662225] [2022-01-18 04:50:32,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:50:32,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:32,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:32,845 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) [2022-01-18 04:50:32,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 04:50:32,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:50:32,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:32,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:32,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:33,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:33,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:33,201 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 42 treesize of output 40 [2022-01-18 04:50:33,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:33,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:50:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:33,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387662225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:33,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:33,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:33,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785346349] [2022-01-18 04:50:33,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:33,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:33,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:33,263 INFO L87 Difference]: Start difference. First operand 192 states and 499 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:33,507 INFO L93 Difference]: Finished difference Result 230 states and 571 transitions. [2022-01-18 04:50:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:50:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:33,508 INFO L225 Difference]: With dead ends: 230 [2022-01-18 04:50:33,508 INFO L226 Difference]: Without dead ends: 230 [2022-01-18 04:50:33,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:50:33,509 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:33,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 143 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:33,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-18 04:50:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 192. [2022-01-18 04:50:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.6178010471204187) internal successors, (500), 191 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 500 transitions. [2022-01-18 04:50:33,511 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 500 transitions. Word has length 17 [2022-01-18 04:50:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:33,511 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 500 transitions. [2022-01-18 04:50:33,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 500 transitions. [2022-01-18 04:50:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:33,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:33,512 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:33,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:33,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:33,712 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1398591385, now seen corresponding path program 87 times [2022-01-18 04:50:33,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:33,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738946100] [2022-01-18 04:50:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:33,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:33,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:33,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738946100] [2022-01-18 04:50:33,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738946100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:33,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551965347] [2022-01-18 04:50:33,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:50:33,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:33,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:33,814 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) [2022-01-18 04:50:33,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 04:50:33,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:50:33,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:33,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 04:50:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:34,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:34,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:34,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 04:50:34,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:34,203 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 04:50:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:34,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551965347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:34,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:34,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:34,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250313808] [2022-01-18 04:50:34,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:34,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:34,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:34,258 INFO L87 Difference]: Start difference. First operand 192 states and 500 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:34,658 INFO L93 Difference]: Finished difference Result 234 states and 583 transitions. [2022-01-18 04:50:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:50:34,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:34,659 INFO L225 Difference]: With dead ends: 234 [2022-01-18 04:50:34,659 INFO L226 Difference]: Without dead ends: 234 [2022-01-18 04:50:34,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:50:34,659 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:34,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 119 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-18 04:50:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 189. [2022-01-18 04:50:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.622340425531915) internal successors, (493), 188 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 493 transitions. [2022-01-18 04:50:34,662 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 493 transitions. Word has length 17 [2022-01-18 04:50:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:34,662 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 493 transitions. [2022-01-18 04:50:34,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 493 transitions. [2022-01-18 04:50:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:34,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:34,662 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:34,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 04:50:34,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:34,875 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:34,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:34,875 INFO L85 PathProgramCache]: Analyzing trace with hash -612537365, now seen corresponding path program 88 times [2022-01-18 04:50:34,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371781540] [2022-01-18 04:50:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:34,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:34,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:34,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371781540] [2022-01-18 04:50:34,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371781540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:34,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830805454] [2022-01-18 04:50:34,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:50:34,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:34,995 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) [2022-01-18 04:50:34,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 04:50:35,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:50:35,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:35,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:35,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:35,211 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 98 treesize of output 82 [2022-01-18 04:50:35,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:50:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:35,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:35,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:35,382 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 73 treesize of output 67 [2022-01-18 04:50:35,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:35,389 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 57 treesize of output 51 [2022-01-18 04:50:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:35,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830805454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:35,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:35,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:35,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345479868] [2022-01-18 04:50:35,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:35,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:35,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:35,508 INFO L87 Difference]: Start difference. First operand 189 states and 493 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:35,740 INFO L93 Difference]: Finished difference Result 257 states and 602 transitions. [2022-01-18 04:50:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:50:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:35,742 INFO L225 Difference]: With dead ends: 257 [2022-01-18 04:50:35,742 INFO L226 Difference]: Without dead ends: 255 [2022-01-18 04:50:35,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:50:35,742 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:35,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 221 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-18 04:50:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 181. [2022-01-18 04:50:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.6055555555555556) internal successors, (469), 180 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 469 transitions. [2022-01-18 04:50:35,744 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 469 transitions. Word has length 17 [2022-01-18 04:50:35,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:35,745 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 469 transitions. [2022-01-18 04:50:35,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 469 transitions. [2022-01-18 04:50:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:35,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:35,745 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:35,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:35,945 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,SelfDestructingSolverStorable96 [2022-01-18 04:50:35,945 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:35,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1617916859, now seen corresponding path program 89 times [2022-01-18 04:50:35,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:35,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33132277] [2022-01-18 04:50:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:35,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:36,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:36,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33132277] [2022-01-18 04:50:36,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33132277] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:36,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393074015] [2022-01-18 04:50:36,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:50:36,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:36,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:36,058 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) [2022-01-18 04:50:36,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 04:50:36,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:50:36,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:36,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:36,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:50:36,271 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 71 treesize of output 55 [2022-01-18 04:50:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:36,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:36,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:36,450 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 34 treesize of output 34 [2022-01-18 04:50:36,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:36,455 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 26 treesize of output 26 [2022-01-18 04:50:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:36,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393074015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:36,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:36,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:36,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730492326] [2022-01-18 04:50:36,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:36,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:36,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:36,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:36,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:36,526 INFO L87 Difference]: Start difference. First operand 181 states and 469 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:36,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:36,928 INFO L93 Difference]: Finished difference Result 256 states and 617 transitions. [2022-01-18 04:50:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:50:36,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:36,929 INFO L225 Difference]: With dead ends: 256 [2022-01-18 04:50:36,929 INFO L226 Difference]: Without dead ends: 253 [2022-01-18 04:50:36,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:50:36,930 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:36,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 140 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-18 04:50:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 190. [2022-01-18 04:50:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.6084656084656084) internal successors, (493), 189 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 493 transitions. [2022-01-18 04:50:36,932 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 493 transitions. Word has length 17 [2022-01-18 04:50:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:36,932 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 493 transitions. [2022-01-18 04:50:36,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 493 transitions. [2022-01-18 04:50:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:36,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:36,933 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:36,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:37,139 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,SelfDestructingSolverStorable97 [2022-01-18 04:50:37,139 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:37,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1914922261, now seen corresponding path program 90 times [2022-01-18 04:50:37,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:37,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685500058] [2022-01-18 04:50:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:37,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:37,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:37,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685500058] [2022-01-18 04:50:37,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685500058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:37,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616292139] [2022-01-18 04:50:37,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:50:37,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:37,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:37,248 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) [2022-01-18 04:50:37,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 04:50:37,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:50:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:37,437 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 87 treesize of output 71 [2022-01-18 04:50:37,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:50:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:37,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:37,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:37,617 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 34 treesize of output 34 [2022-01-18 04:50:37,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:37,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 04:50:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:37,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616292139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:37,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:37,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:37,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111309602] [2022-01-18 04:50:37,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:37,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:37,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:37,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:37,697 INFO L87 Difference]: Start difference. First operand 190 states and 493 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:37,880 INFO L93 Difference]: Finished difference Result 252 states and 623 transitions. [2022-01-18 04:50:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:50:37,881 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:37,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:37,881 INFO L225 Difference]: With dead ends: 252 [2022-01-18 04:50:37,881 INFO L226 Difference]: Without dead ends: 250 [2022-01-18 04:50:37,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:37,882 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:37,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 116 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-18 04:50:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 194. [2022-01-18 04:50:37,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.61139896373057) internal successors, (504), 193 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 504 transitions. [2022-01-18 04:50:37,884 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 504 transitions. Word has length 17 [2022-01-18 04:50:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:37,884 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 504 transitions. [2022-01-18 04:50:37,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 504 transitions. [2022-01-18 04:50:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:37,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:37,885 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:37,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:38,085 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,SelfDestructingSolverStorable98 [2022-01-18 04:50:38,085 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:38,086 INFO L85 PathProgramCache]: Analyzing trace with hash 231248499, now seen corresponding path program 91 times [2022-01-18 04:50:38,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:38,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986765327] [2022-01-18 04:50:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:38,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:38,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:38,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986765327] [2022-01-18 04:50:38,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986765327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:38,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847867189] [2022-01-18 04:50:38,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:50:38,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:38,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:38,235 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) [2022-01-18 04:50:38,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 04:50:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:50:38,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:38,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:38,628 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 04:50:38,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2022-01-18 04:50:38,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:50:38,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:38,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 41 [2022-01-18 04:50:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:38,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847867189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:38,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:38,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:38,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126477248] [2022-01-18 04:50:38,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:38,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:38,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:38,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:38,750 INFO L87 Difference]: Start difference. First operand 194 states and 504 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:39,249 INFO L93 Difference]: Finished difference Result 312 states and 724 transitions. [2022-01-18 04:50:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:50:39,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:39,251 INFO L225 Difference]: With dead ends: 312 [2022-01-18 04:50:39,251 INFO L226 Difference]: Without dead ends: 312 [2022-01-18 04:50:39,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:50:39,251 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:39,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 228 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:39,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-18 04:50:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 195. [2022-01-18 04:50:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.6288659793814433) internal successors, (510), 194 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 510 transitions. [2022-01-18 04:50:39,254 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 510 transitions. Word has length 17 [2022-01-18 04:50:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:39,254 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 510 transitions. [2022-01-18 04:50:39,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 510 transitions. [2022-01-18 04:50:39,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:39,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:39,254 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:39,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:39,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:39,470 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:39,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1177149799, now seen corresponding path program 92 times [2022-01-18 04:50:39,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:39,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125722908] [2022-01-18 04:50:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:39,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:39,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:39,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125722908] [2022-01-18 04:50:39,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125722908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:39,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879036542] [2022-01-18 04:50:39,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:50:39,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:39,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:39,582 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) [2022-01-18 04:50:39,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 04:50:39,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:50:39,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:39,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:39,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:39,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:39,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:39,907 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-01-18 04:50:39,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:39,911 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 26 treesize of output 26 [2022-01-18 04:50:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:39,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879036542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:39,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:39,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:39,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645925309] [2022-01-18 04:50:39,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:39,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:39,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:39,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:39,992 INFO L87 Difference]: Start difference. First operand 195 states and 510 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:40,261 INFO L93 Difference]: Finished difference Result 248 states and 611 transitions. [2022-01-18 04:50:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:50:40,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:40,262 INFO L225 Difference]: With dead ends: 248 [2022-01-18 04:50:40,262 INFO L226 Difference]: Without dead ends: 248 [2022-01-18 04:50:40,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:50:40,263 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:40,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 148 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:40,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-18 04:50:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 198. [2022-01-18 04:50:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.6395939086294415) internal successors, (520), 197 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 520 transitions. [2022-01-18 04:50:40,265 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 520 transitions. Word has length 17 [2022-01-18 04:50:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:40,266 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 520 transitions. [2022-01-18 04:50:40,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 520 transitions. [2022-01-18 04:50:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:40,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:40,266 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:40,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:40,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:40,482 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:40,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:40,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1963203819, now seen corresponding path program 93 times [2022-01-18 04:50:40,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:40,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254926345] [2022-01-18 04:50:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:40,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:40,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:40,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254926345] [2022-01-18 04:50:40,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254926345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:40,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224514520] [2022-01-18 04:50:40,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:50:40,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:40,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:40,612 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) [2022-01-18 04:50:40,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 04:50:40,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:50:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 04:50:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:41,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:41,017 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 62 treesize of output 58 [2022-01-18 04:50:41,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:41,024 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 50 treesize of output 46 [2022-01-18 04:50:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:41,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:41,663 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-01-18 04:50:41,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 121 [2022-01-18 04:50:41,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:41,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 98 [2022-01-18 04:50:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:42,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224514520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:42,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:42,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 24 [2022-01-18 04:50:42,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777187950] [2022-01-18 04:50:42,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:42,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:50:42,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:50:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:50:42,228 INFO L87 Difference]: Start difference. First operand 198 states and 520 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:43,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:43,084 INFO L93 Difference]: Finished difference Result 275 states and 657 transitions. [2022-01-18 04:50:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:50:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:43,085 INFO L225 Difference]: With dead ends: 275 [2022-01-18 04:50:43,085 INFO L226 Difference]: Without dead ends: 261 [2022-01-18 04:50:43,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:50:43,085 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:43,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 219 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 643 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-01-18 04:50:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-18 04:50:43,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 198. [2022-01-18 04:50:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.649746192893401) internal successors, (522), 197 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 522 transitions. [2022-01-18 04:50:43,088 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 522 transitions. Word has length 17 [2022-01-18 04:50:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:43,088 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 522 transitions. [2022-01-18 04:50:43,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 522 transitions. [2022-01-18 04:50:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:43,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:43,089 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:43,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 04:50:43,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 04:50:43,300 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:43,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1921191403, now seen corresponding path program 94 times [2022-01-18 04:50:43,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:43,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71627314] [2022-01-18 04:50:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:43,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:43,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:43,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71627314] [2022-01-18 04:50:43,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71627314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:43,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24778776] [2022-01-18 04:50:43,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:50:43,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:43,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:43,426 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) [2022-01-18 04:50:43,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 04:50:43,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:50:43,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:43,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:43,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:43,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:43,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:43,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-01-18 04:50:43,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:43,763 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 26 treesize of output 26 [2022-01-18 04:50:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:43,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24778776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:43,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:43,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:43,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316059265] [2022-01-18 04:50:43,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:43,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:43,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:43,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:43,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:43,846 INFO L87 Difference]: Start difference. First operand 198 states and 522 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:44,252 INFO L93 Difference]: Finished difference Result 293 states and 710 transitions. [2022-01-18 04:50:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:50:44,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:44,253 INFO L225 Difference]: With dead ends: 293 [2022-01-18 04:50:44,253 INFO L226 Difference]: Without dead ends: 293 [2022-01-18 04:50:44,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:50:44,253 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:44,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 184 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-18 04:50:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 198. [2022-01-18 04:50:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.6548223350253806) internal successors, (523), 197 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 523 transitions. [2022-01-18 04:50:44,256 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 523 transitions. Word has length 17 [2022-01-18 04:50:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:44,256 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 523 transitions. [2022-01-18 04:50:44,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 523 transitions. [2022-01-18 04:50:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:44,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:44,257 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:44,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:44,457 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,SelfDestructingSolverStorable102 [2022-01-18 04:50:44,457 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:44,457 INFO L85 PathProgramCache]: Analyzing trace with hash 660818923, now seen corresponding path program 95 times [2022-01-18 04:50:44,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:44,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668891901] [2022-01-18 04:50:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:44,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:44,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:44,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668891901] [2022-01-18 04:50:44,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668891901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:44,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355102850] [2022-01-18 04:50:44,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:50:44,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:44,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:44,572 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) [2022-01-18 04:50:44,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 04:50:44,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:50:44,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:44,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:44,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:44,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:50:44,785 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 73 treesize of output 57 [2022-01-18 04:50:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:44,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:44,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:44,974 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 42 treesize of output 40 [2022-01-18 04:50:44,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:44,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:50:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:45,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355102850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:45,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:45,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:45,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223371430] [2022-01-18 04:50:45,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:45,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:45,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:45,037 INFO L87 Difference]: Start difference. First operand 198 states and 523 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:45,584 INFO L93 Difference]: Finished difference Result 273 states and 678 transitions. [2022-01-18 04:50:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:50:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:45,585 INFO L225 Difference]: With dead ends: 273 [2022-01-18 04:50:45,585 INFO L226 Difference]: Without dead ends: 271 [2022-01-18 04:50:45,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:50:45,585 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 114 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:45,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 135 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-18 04:50:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 208. [2022-01-18 04:50:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.642512077294686) internal successors, (547), 207 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 547 transitions. [2022-01-18 04:50:45,588 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 547 transitions. Word has length 17 [2022-01-18 04:50:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:45,588 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 547 transitions. [2022-01-18 04:50:45,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 547 transitions. [2022-01-18 04:50:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:45,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:45,588 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:45,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:45,789 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,SelfDestructingSolverStorable103 [2022-01-18 04:50:45,789 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1487977613, now seen corresponding path program 96 times [2022-01-18 04:50:45,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:45,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583039643] [2022-01-18 04:50:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:45,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:45,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:45,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583039643] [2022-01-18 04:50:45,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583039643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:45,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134226032] [2022-01-18 04:50:45,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:50:45,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:45,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:45,879 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) [2022-01-18 04:50:45,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 04:50:45,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:50:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:45,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:46,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:46,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:46,242 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 41 treesize of output 39 [2022-01-18 04:50:46,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:46,247 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 29 treesize of output 27 [2022-01-18 04:50:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:46,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134226032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:46,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:46,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:46,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213228206] [2022-01-18 04:50:46,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:46,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:46,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:46,304 INFO L87 Difference]: Start difference. First operand 208 states and 547 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:46,683 INFO L93 Difference]: Finished difference Result 257 states and 647 transitions. [2022-01-18 04:50:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:50:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:46,684 INFO L225 Difference]: With dead ends: 257 [2022-01-18 04:50:46,684 INFO L226 Difference]: Without dead ends: 257 [2022-01-18 04:50:46,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:50:46,684 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 79 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:46,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 70 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-18 04:50:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 207. [2022-01-18 04:50:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.6407766990291264) internal successors, (544), 206 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 544 transitions. [2022-01-18 04:50:46,687 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 544 transitions. Word has length 17 [2022-01-18 04:50:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:46,687 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 544 transitions. [2022-01-18 04:50:46,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 544 transitions. [2022-01-18 04:50:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:46,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:46,687 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:46,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:46,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:46,888 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 618806507, now seen corresponding path program 97 times [2022-01-18 04:50:46,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:46,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451241851] [2022-01-18 04:50:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:46,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:47,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451241851] [2022-01-18 04:50:47,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451241851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363348635] [2022-01-18 04:50:47,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:50:47,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:47,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:47,010 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) [2022-01-18 04:50:47,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 04:50:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:47,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:47,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:47,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:47,381 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 42 treesize of output 40 [2022-01-18 04:50:47,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:47,386 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 30 treesize of output 28 [2022-01-18 04:50:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:47,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363348635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:47,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:47,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:47,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502067438] [2022-01-18 04:50:47,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:47,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:47,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:47,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:47,464 INFO L87 Difference]: Start difference. First operand 207 states and 544 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:47,710 INFO L93 Difference]: Finished difference Result 251 states and 631 transitions. [2022-01-18 04:50:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:50:47,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:47,711 INFO L225 Difference]: With dead ends: 251 [2022-01-18 04:50:47,711 INFO L226 Difference]: Without dead ends: 251 [2022-01-18 04:50:47,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:50:47,711 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:47,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 98 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-18 04:50:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 201. [2022-01-18 04:50:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.64) internal successors, (528), 200 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 528 transitions. [2022-01-18 04:50:47,715 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 528 transitions. Word has length 17 [2022-01-18 04:50:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:47,715 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 528 transitions. [2022-01-18 04:50:47,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 528 transitions. [2022-01-18 04:50:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:47,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:47,716 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:47,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 04:50:47,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:47,932 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1601461035, now seen corresponding path program 98 times [2022-01-18 04:50:47,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:47,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832172639] [2022-01-18 04:50:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:47,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:48,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:48,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832172639] [2022-01-18 04:50:48,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832172639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:48,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446712489] [2022-01-18 04:50:48,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:50:48,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:48,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:48,047 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) [2022-01-18 04:50:48,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 04:50:48,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:50:48,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:48,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:48,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:48,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:48,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-01-18 04:50:48,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:48,443 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 26 treesize of output 26 [2022-01-18 04:50:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:48,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446712489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:48,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:48,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:48,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355535672] [2022-01-18 04:50:48,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:48,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:48,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:48,512 INFO L87 Difference]: Start difference. First operand 201 states and 528 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:48,807 INFO L93 Difference]: Finished difference Result 280 states and 678 transitions. [2022-01-18 04:50:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:50:48,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:48,808 INFO L225 Difference]: With dead ends: 280 [2022-01-18 04:50:48,808 INFO L226 Difference]: Without dead ends: 280 [2022-01-18 04:50:48,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:50:48,808 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:48,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 165 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-18 04:50:48,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 202. [2022-01-18 04:50:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.646766169154229) internal successors, (532), 201 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 532 transitions. [2022-01-18 04:50:48,811 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 532 transitions. Word has length 17 [2022-01-18 04:50:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:48,811 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 532 transitions. [2022-01-18 04:50:48,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 532 transitions. [2022-01-18 04:50:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:48,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:48,812 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:48,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 04:50:49,012 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,SelfDestructingSolverStorable106 [2022-01-18 04:50:49,012 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:49,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1907452241, now seen corresponding path program 99 times [2022-01-18 04:50:49,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:49,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111419150] [2022-01-18 04:50:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:49,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:49,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111419150] [2022-01-18 04:50:49,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111419150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601019956] [2022-01-18 04:50:49,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:50:49,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:49,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:49,117 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) [2022-01-18 04:50:49,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 04:50:49,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:50:49,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:50:49,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:49,331 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 98 treesize of output 82 [2022-01-18 04:50:49,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:50:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:49,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:49,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:49,586 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 65 treesize of output 61 [2022-01-18 04:50:49,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:49,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2022-01-18 04:50:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:49,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601019956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:49,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:49,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-01-18 04:50:49,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501235369] [2022-01-18 04:50:49,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:49,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:49,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:49,701 INFO L87 Difference]: Start difference. First operand 202 states and 532 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:49,973 INFO L93 Difference]: Finished difference Result 296 states and 698 transitions. [2022-01-18 04:50:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:50:49,973 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:49,974 INFO L225 Difference]: With dead ends: 296 [2022-01-18 04:50:49,974 INFO L226 Difference]: Without dead ends: 294 [2022-01-18 04:50:49,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:50:49,974 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 132 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:49,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 168 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-18 04:50:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 198. [2022-01-18 04:50:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.6395939086294415) internal successors, (520), 197 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 520 transitions. [2022-01-18 04:50:49,977 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 520 transitions. Word has length 17 [2022-01-18 04:50:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:49,977 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 520 transitions. [2022-01-18 04:50:49,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 520 transitions. [2022-01-18 04:50:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:49,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:49,977 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:49,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 04:50:50,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:50,178 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1543987823, now seen corresponding path program 100 times [2022-01-18 04:50:50,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:50,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429100478] [2022-01-18 04:50:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:50,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:50,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429100478] [2022-01-18 04:50:50,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429100478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436710318] [2022-01-18 04:50:50,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:50:50,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:50,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:50,303 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) [2022-01-18 04:50:50,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 04:50:50,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:50:50,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:50:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:50,523 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 98 treesize of output 82 [2022-01-18 04:50:50,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:50:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:50,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:50,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:50,679 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 63 treesize of output 59 [2022-01-18 04:50:50,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:50,685 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 51 treesize of output 47 [2022-01-18 04:50:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:50,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436710318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:50,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:50,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:50,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349432453] [2022-01-18 04:50:50,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:50,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:50,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:50,796 INFO L87 Difference]: Start difference. First operand 198 states and 520 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:51,579 INFO L93 Difference]: Finished difference Result 327 states and 745 transitions. [2022-01-18 04:50:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:50:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:51,580 INFO L225 Difference]: With dead ends: 327 [2022-01-18 04:50:51,580 INFO L226 Difference]: Without dead ends: 318 [2022-01-18 04:50:51,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:50:51,580 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:51,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 201 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-18 04:50:51,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 198. [2022-01-18 04:50:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.6294416243654823) internal successors, (518), 197 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 518 transitions. [2022-01-18 04:50:51,583 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 518 transitions. Word has length 17 [2022-01-18 04:50:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:51,583 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 518 transitions. [2022-01-18 04:50:51,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 518 transitions. [2022-01-18 04:50:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:51,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:51,584 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:51,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 04:50:51,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:51,791 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1949464657, now seen corresponding path program 101 times [2022-01-18 04:50:51,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:51,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106897425] [2022-01-18 04:50:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:51,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:51,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106897425] [2022-01-18 04:50:51,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106897425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871879857] [2022-01-18 04:50:51,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:50:51,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:51,952 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) [2022-01-18 04:50:51,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 04:50:51,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:50:51,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:52,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:52,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:52,338 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 34 treesize of output 34 [2022-01-18 04:50:52,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:52,343 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 26 treesize of output 26 [2022-01-18 04:50:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:52,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871879857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:52,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:52,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:52,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442098009] [2022-01-18 04:50:52,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:52,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:52,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:52,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:52,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:52,413 INFO L87 Difference]: Start difference. First operand 198 states and 518 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:52,774 INFO L93 Difference]: Finished difference Result 272 states and 670 transitions. [2022-01-18 04:50:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:50:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:52,774 INFO L225 Difference]: With dead ends: 272 [2022-01-18 04:50:52,774 INFO L226 Difference]: Without dead ends: 272 [2022-01-18 04:50:52,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:50:52,775 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 79 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:52,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 172 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-18 04:50:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 197. [2022-01-18 04:50:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.627551020408163) internal successors, (515), 196 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 515 transitions. [2022-01-18 04:50:52,777 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 515 transitions. Word has length 17 [2022-01-18 04:50:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:52,777 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 515 transitions. [2022-01-18 04:50:52,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 515 transitions. [2022-01-18 04:50:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:52,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:52,778 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:52,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:52,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:52,991 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1085130159, now seen corresponding path program 102 times [2022-01-18 04:50:52,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:52,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915241248] [2022-01-18 04:50:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:52,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:53,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:53,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915241248] [2022-01-18 04:50:53,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915241248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:53,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687509681] [2022-01-18 04:50:53,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:50:53,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:53,080 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) [2022-01-18 04:50:53,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 04:50:53,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:50:53,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:53,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:50:53,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:53,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:50:53,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:50:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:53,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:53,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:53,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 04:50:53,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:53,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 04:50:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:53,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687509681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:53,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:53,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:53,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642685744] [2022-01-18 04:50:53,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:53,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:53,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:53,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:53,597 INFO L87 Difference]: Start difference. First operand 197 states and 515 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:53,767 INFO L93 Difference]: Finished difference Result 238 states and 593 transitions. [2022-01-18 04:50:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:50:53,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:53,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:53,767 INFO L225 Difference]: With dead ends: 238 [2022-01-18 04:50:53,767 INFO L226 Difference]: Without dead ends: 236 [2022-01-18 04:50:53,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:53,768 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:53,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 116 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:53,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-18 04:50:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 203. [2022-01-18 04:50:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.633663366336634) internal successors, (532), 202 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 532 transitions. [2022-01-18 04:50:53,770 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 532 transitions. Word has length 17 [2022-01-18 04:50:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:53,770 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 532 transitions. [2022-01-18 04:50:53,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 532 transitions. [2022-01-18 04:50:53,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:53,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:53,771 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:53,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 04:50:53,971 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,SelfDestructingSolverStorable110 [2022-01-18 04:50:53,971 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:53,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1063666377, now seen corresponding path program 103 times [2022-01-18 04:50:53,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:53,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281531178] [2022-01-18 04:50:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:53,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:54,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:54,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281531178] [2022-01-18 04:50:54,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281531178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:54,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683365775] [2022-01-18 04:50:54,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:50:54,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:54,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:54,080 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) [2022-01-18 04:50:54,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 04:50:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:54,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:54,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:54,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:54,440 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 41 treesize of output 39 [2022-01-18 04:50:54,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:54,445 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 29 treesize of output 27 [2022-01-18 04:50:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:54,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683365775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:54,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:54,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:54,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385478254] [2022-01-18 04:50:54,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:54,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:54,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:54,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:54,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:54,496 INFO L87 Difference]: Start difference. First operand 203 states and 532 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:54,674 INFO L93 Difference]: Finished difference Result 235 states and 595 transitions. [2022-01-18 04:50:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:50:54,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:54,674 INFO L225 Difference]: With dead ends: 235 [2022-01-18 04:50:54,674 INFO L226 Difference]: Without dead ends: 235 [2022-01-18 04:50:54,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:54,675 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:54,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 129 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-18 04:50:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 201. [2022-01-18 04:50:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.635) internal successors, (527), 200 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 527 transitions. [2022-01-18 04:50:54,677 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 527 transitions. Word has length 17 [2022-01-18 04:50:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:54,677 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 527 transitions. [2022-01-18 04:50:54,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 527 transitions. [2022-01-18 04:50:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:54,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:54,678 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:54,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:54,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:54,878 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1043117743, now seen corresponding path program 104 times [2022-01-18 04:50:54,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:54,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472584930] [2022-01-18 04:50:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:54,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:54,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472584930] [2022-01-18 04:50:54,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472584930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106224274] [2022-01-18 04:50:54,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:50:54,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:54,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:54,974 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) [2022-01-18 04:50:54,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 04:50:55,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:50:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:55,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:55,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-18 04:50:55,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:50:55,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 04:50:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:55,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106224274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:55,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:55,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:55,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894765851] [2022-01-18 04:50:55,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:55,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:55,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:55,419 INFO L87 Difference]: Start difference. First operand 201 states and 527 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:55,642 INFO L93 Difference]: Finished difference Result 226 states and 575 transitions. [2022-01-18 04:50:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:50:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:55,642 INFO L225 Difference]: With dead ends: 226 [2022-01-18 04:50:55,642 INFO L226 Difference]: Without dead ends: 226 [2022-01-18 04:50:55,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:50:55,643 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:55,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 98 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:55,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-18 04:50:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 194. [2022-01-18 04:50:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.6373056994818653) internal successors, (509), 193 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 509 transitions. [2022-01-18 04:50:55,645 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 509 transitions. Word has length 17 [2022-01-18 04:50:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:55,645 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 509 transitions. [2022-01-18 04:50:55,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 509 transitions. [2022-01-18 04:50:55,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:55,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:55,645 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:55,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 04:50:55,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:55,846 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:55,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1930101611, now seen corresponding path program 105 times [2022-01-18 04:50:55,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:55,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185033864] [2022-01-18 04:50:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:55,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:55,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:55,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185033864] [2022-01-18 04:50:55,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185033864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:55,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31418640] [2022-01-18 04:50:55,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:50:55,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:55,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:55,922 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) [2022-01-18 04:50:55,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 04:50:55,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:50:55,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:55,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:56,140 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 87 treesize of output 71 [2022-01-18 04:50:56,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:50:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:56,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:56,348 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:56,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 25 [2022-01-18 04:50:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:56,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31418640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:56,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:56,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 04:50:56,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204295874] [2022-01-18 04:50:56,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:56,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:50:56,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:56,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:50:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:50:56,357 INFO L87 Difference]: Start difference. First operand 194 states and 509 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:56,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:56,588 INFO L93 Difference]: Finished difference Result 270 states and 650 transitions. [2022-01-18 04:50:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:50:56,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:56,588 INFO L225 Difference]: With dead ends: 270 [2022-01-18 04:50:56,589 INFO L226 Difference]: Without dead ends: 268 [2022-01-18 04:50:56,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:50:56,589 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:56,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 126 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-18 04:50:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 200. [2022-01-18 04:50:56,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.64321608040201) internal successors, (526), 199 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 526 transitions. [2022-01-18 04:50:56,591 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 526 transitions. Word has length 17 [2022-01-18 04:50:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:56,591 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 526 transitions. [2022-01-18 04:50:56,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:56,591 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 526 transitions. [2022-01-18 04:50:56,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:56,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:56,592 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:56,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:56,792 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,SelfDestructingSolverStorable113 [2022-01-18 04:50:56,792 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -218694925, now seen corresponding path program 106 times [2022-01-18 04:50:56,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:56,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491934727] [2022-01-18 04:50:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:56,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:56,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491934727] [2022-01-18 04:50:56,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491934727] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609761840] [2022-01-18 04:50:56,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:50:56,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:56,882 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) [2022-01-18 04:50:56,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 04:50:56,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:50:56,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:57,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:57,278 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:57,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-01-18 04:50:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:57,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609761840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:57,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:57,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:50:57,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129765778] [2022-01-18 04:50:57,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:57,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:50:57,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:57,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:50:57,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:50:57,297 INFO L87 Difference]: Start difference. First operand 200 states and 526 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:57,498 INFO L93 Difference]: Finished difference Result 267 states and 652 transitions. [2022-01-18 04:50:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:50:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:57,499 INFO L225 Difference]: With dead ends: 267 [2022-01-18 04:50:57,499 INFO L226 Difference]: Without dead ends: 267 [2022-01-18 04:50:57,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:50:57,499 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:57,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 126 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-18 04:50:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 198. [2022-01-18 04:50:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.6446700507614214) internal successors, (521), 197 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 521 transitions. [2022-01-18 04:50:57,501 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 521 transitions. Word has length 17 [2022-01-18 04:50:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:57,502 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 521 transitions. [2022-01-18 04:50:57,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 521 transitions. [2022-01-18 04:50:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:57,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:57,502 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:57,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 04:50:57,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 04:50:57,702 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1888089195, now seen corresponding path program 107 times [2022-01-18 04:50:57,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:57,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414508562] [2022-01-18 04:50:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:57,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:57,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:57,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414508562] [2022-01-18 04:50:57,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414508562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:57,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771206011] [2022-01-18 04:50:57,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:50:57,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:57,789 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) [2022-01-18 04:50:57,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 04:50:57,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:50:57,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:57,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:58,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:58,168 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:58,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-01-18 04:50:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:58,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771206011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:58,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:58,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:50:58,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436320843] [2022-01-18 04:50:58,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:58,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:50:58,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:58,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:50:58,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:50:58,187 INFO L87 Difference]: Start difference. First operand 198 states and 521 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:58,632 INFO L93 Difference]: Finished difference Result 279 states and 677 transitions. [2022-01-18 04:50:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:50:58,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:58,633 INFO L225 Difference]: With dead ends: 279 [2022-01-18 04:50:58,633 INFO L226 Difference]: Without dead ends: 279 [2022-01-18 04:50:58,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:50:58,634 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:58,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 182 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:50:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-18 04:50:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 196. [2022-01-18 04:50:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.646153846153846) internal successors, (516), 195 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) [2022-01-18 04:50:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 516 transitions. [2022-01-18 04:50:58,636 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 516 transitions. Word has length 17 [2022-01-18 04:50:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:58,636 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 516 transitions. [2022-01-18 04:50:58,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 516 transitions. [2022-01-18 04:50:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:50:58,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:58,637 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:58,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-18 04:50:58,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:58,837 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:58,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1963978961, now seen corresponding path program 108 times [2022-01-18 04:50:58,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:58,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109297066] [2022-01-18 04:50:58,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:58,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:50:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:58,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:50:58,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109297066] [2022-01-18 04:50:58,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109297066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:50:58,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649747040] [2022-01-18 04:50:58,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:50:58,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:58,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:50:58,912 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) [2022-01-18 04:50:58,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 04:50:58,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:50:58,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:50:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:50:58,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:50:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:59,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:50:59,240 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:50:59,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2022-01-18 04:50:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:50:59,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649747040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:50:59,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:50:59,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:50:59,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174740003] [2022-01-18 04:50:59,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:50:59,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:50:59,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:50:59,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:50:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:50:59,258 INFO L87 Difference]: Start difference. First operand 196 states and 516 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:50:59,564 INFO L93 Difference]: Finished difference Result 267 states and 650 transitions. [2022-01-18 04:50:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:50:59,564 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 04:50:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:50:59,564 INFO L225 Difference]: With dead ends: 267 [2022-01-18 04:50:59,564 INFO L226 Difference]: Without dead ends: 267 [2022-01-18 04:50:59,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:50:59,565 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:50:59,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 134 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:50:59,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-18 04:50:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 189. [2022-01-18 04:50:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.643617021276596) internal successors, (497), 188 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 497 transitions. [2022-01-18 04:50:59,567 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 497 transitions. Word has length 17 [2022-01-18 04:50:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:50:59,567 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 497 transitions. [2022-01-18 04:50:59,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:50:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 497 transitions. [2022-01-18 04:50:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:50:59,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:50:59,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:50:59,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 04:50:59,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:50:59,768 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:50:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:50:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 895555855, now seen corresponding path program 109 times [2022-01-18 04:50:59,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:50:59,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645782550] [2022-01-18 04:50:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:50:59,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:50:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:00,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645782550] [2022-01-18 04:51:00,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645782550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509449791] [2022-01-18 04:51:00,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:51:00,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:00,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:00,144 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) [2022-01-18 04:51:00,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 04:51:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:51:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:00,588 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 71 treesize of output 59 [2022-01-18 04:51:00,589 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 59 treesize of output 47 [2022-01-18 04:51:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:00,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:01,039 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:51:01,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 109 [2022-01-18 04:51:01,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 86 [2022-01-18 04:51:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:01,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509449791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:01,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:01,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 04:51:01,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368415796] [2022-01-18 04:51:01,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:01,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:51:01,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:51:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:51:01,132 INFO L87 Difference]: Start difference. First operand 189 states and 497 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:01,614 INFO L93 Difference]: Finished difference Result 280 states and 665 transitions. [2022-01-18 04:51:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:51:01,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:01,615 INFO L225 Difference]: With dead ends: 280 [2022-01-18 04:51:01,615 INFO L226 Difference]: Without dead ends: 263 [2022-01-18 04:51:01,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:51:01,615 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 130 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:01,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 211 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:51:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-18 04:51:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 190. [2022-01-18 04:51:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.64021164021164) internal successors, (499), 189 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 499 transitions. [2022-01-18 04:51:01,617 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 499 transitions. Word has length 18 [2022-01-18 04:51:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:01,618 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 499 transitions. [2022-01-18 04:51:01,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 499 transitions. [2022-01-18 04:51:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:01,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:01,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:01,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:01,818 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,SelfDestructingSolverStorable117 [2022-01-18 04:51:01,818 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1826516853, now seen corresponding path program 110 times [2022-01-18 04:51:01,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:01,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778952292] [2022-01-18 04:51:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:01,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:02,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:02,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778952292] [2022-01-18 04:51:02,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778952292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:02,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038303943] [2022-01-18 04:51:02,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:51:02,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:02,099 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) [2022-01-18 04:51:02,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 04:51:02,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:51:02,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:02,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:02,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 04:51:02,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 04:51:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:02,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:03,115 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:51:03,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 83 [2022-01-18 04:51:03,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:51:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:03,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038303943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:03,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:03,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:51:03,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349916628] [2022-01-18 04:51:03,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:03,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:51:03,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:51:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:51:03,212 INFO L87 Difference]: Start difference. First operand 190 states and 499 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:05,211 INFO L93 Difference]: Finished difference Result 377 states and 865 transitions. [2022-01-18 04:51:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:51:05,211 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:05,212 INFO L225 Difference]: With dead ends: 377 [2022-01-18 04:51:05,212 INFO L226 Difference]: Without dead ends: 341 [2022-01-18 04:51:05,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=442, Invalid=2864, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 04:51:05,212 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 219 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:05,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 312 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-18 04:51:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 197. [2022-01-18 04:51:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.63265306122449) internal successors, (516), 196 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) [2022-01-18 04:51:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 516 transitions. [2022-01-18 04:51:05,215 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 516 transitions. Word has length 18 [2022-01-18 04:51:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:05,215 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 516 transitions. [2022-01-18 04:51:05,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 516 transitions. [2022-01-18 04:51:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:05,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:05,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:05,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-18 04:51:05,416 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,SelfDestructingSolverStorable118 [2022-01-18 04:51:05,416 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash 708397503, now seen corresponding path program 111 times [2022-01-18 04:51:05,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:05,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904491828] [2022-01-18 04:51:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:05,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:05,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:05,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904491828] [2022-01-18 04:51:05,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904491828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:05,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180400267] [2022-01-18 04:51:05,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:51:05,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:05,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:05,693 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) [2022-01-18 04:51:05,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 04:51:05,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:51:05,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 04:51:05,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:06,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:51:06,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:51:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:06,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:07,051 INFO L353 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2022-01-18 04:51:07,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 79 [2022-01-18 04:51:07,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:51:07,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 38 [2022-01-18 04:51:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:07,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180400267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:07,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:07,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-01-18 04:51:07,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142983132] [2022-01-18 04:51:07,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:07,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 04:51:07,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 04:51:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:51:07,080 INFO L87 Difference]: Start difference. First operand 197 states and 516 transitions. Second operand has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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) [2022-01-18 04:51:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:09,671 INFO L93 Difference]: Finished difference Result 423 states and 946 transitions. [2022-01-18 04:51:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:51:09,671 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:09,672 INFO L225 Difference]: With dead ends: 423 [2022-01-18 04:51:09,672 INFO L226 Difference]: Without dead ends: 387 [2022-01-18 04:51:09,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=445, Invalid=3215, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 04:51:09,672 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:09,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 328 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-18 04:51:09,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 203. [2022-01-18 04:51:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.623762376237624) internal successors, (530), 202 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 530 transitions. [2022-01-18 04:51:09,675 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 530 transitions. Word has length 18 [2022-01-18 04:51:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:09,675 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 530 transitions. [2022-01-18 04:51:09,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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) [2022-01-18 04:51:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 530 transitions. [2022-01-18 04:51:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:09,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:09,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:09,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:09,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:09,876 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1749973571, now seen corresponding path program 112 times [2022-01-18 04:51:09,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944397726] [2022-01-18 04:51:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:09,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:10,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:10,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944397726] [2022-01-18 04:51:10,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944397726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:10,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891389983] [2022-01-18 04:51:10,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:51:10,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:10,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:10,167 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) [2022-01-18 04:51:10,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 04:51:10,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:51:10,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:10,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:51:10,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:10,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:51:10,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:51:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:10,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:11,136 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:11,136 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 144 treesize of output 117 [2022-01-18 04:51:11,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:51:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:11,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891389983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:11,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:11,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:51:11,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692881485] [2022-01-18 04:51:11,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:11,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:51:11,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:11,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:51:11,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:51:11,268 INFO L87 Difference]: Start difference. First operand 203 states and 530 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:11,882 INFO L93 Difference]: Finished difference Result 251 states and 611 transitions. [2022-01-18 04:51:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:51:11,882 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:11,883 INFO L225 Difference]: With dead ends: 251 [2022-01-18 04:51:11,883 INFO L226 Difference]: Without dead ends: 238 [2022-01-18 04:51:11,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:51:11,883 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 123 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:11,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 212 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:51:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-18 04:51:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 203. [2022-01-18 04:51:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.618811881188119) internal successors, (529), 202 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:11,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 529 transitions. [2022-01-18 04:51:11,885 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 529 transitions. Word has length 18 [2022-01-18 04:51:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:11,885 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 529 transitions. [2022-01-18 04:51:11,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:11,886 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 529 transitions. [2022-01-18 04:51:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:11,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:11,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:11,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:12,086 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,SelfDestructingSolverStorable120 [2022-01-18 04:51:12,086 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:12,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:12,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1783572799, now seen corresponding path program 113 times [2022-01-18 04:51:12,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:12,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833133163] [2022-01-18 04:51:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:12,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:12,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:12,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833133163] [2022-01-18 04:51:12,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833133163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:12,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062709675] [2022-01-18 04:51:12,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:51:12,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:12,397 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) [2022-01-18 04:51:12,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 04:51:12,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:51:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:12,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:12,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:51:12,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:51:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:12,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:13,438 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:13,439 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 144 treesize of output 117 [2022-01-18 04:51:13,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:51:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:13,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062709675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:13,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:13,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:51:13,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138157398] [2022-01-18 04:51:13,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:13,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:51:13,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:51:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:51:13,576 INFO L87 Difference]: Start difference. First operand 203 states and 529 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:15,531 INFO L93 Difference]: Finished difference Result 376 states and 818 transitions. [2022-01-18 04:51:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:51:15,531 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:15,532 INFO L225 Difference]: With dead ends: 376 [2022-01-18 04:51:15,532 INFO L226 Difference]: Without dead ends: 344 [2022-01-18 04:51:15,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=292, Invalid=2158, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 04:51:15,532 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 198 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:15,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 369 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-18 04:51:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 210. [2022-01-18 04:51:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.6411483253588517) internal successors, (552), 209 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:15,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 552 transitions. [2022-01-18 04:51:15,535 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 552 transitions. Word has length 18 [2022-01-18 04:51:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:15,535 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 552 transitions. [2022-01-18 04:51:15,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 552 transitions. [2022-01-18 04:51:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:15,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:15,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:15,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 04:51:15,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:15,736 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:15,736 INFO L85 PathProgramCache]: Analyzing trace with hash -432100669, now seen corresponding path program 114 times [2022-01-18 04:51:15,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:15,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983300273] [2022-01-18 04:51:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:15,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:15,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:15,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983300273] [2022-01-18 04:51:15,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983300273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:15,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302076572] [2022-01-18 04:51:15,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:51:15,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:15,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:15,953 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) [2022-01-18 04:51:15,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 04:51:16,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:51:16,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:16,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:16,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:16,456 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 106 treesize of output 90 [2022-01-18 04:51:16,458 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 90 treesize of output 74 [2022-01-18 04:51:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:16,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:17,240 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:17,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-01-18 04:51:17,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-01-18 04:51:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:17,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302076572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:17,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:17,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:51:17,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315076277] [2022-01-18 04:51:17,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:17,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:51:17,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:51:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:51:17,373 INFO L87 Difference]: Start difference. First operand 210 states and 552 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:18,695 INFO L93 Difference]: Finished difference Result 366 states and 803 transitions. [2022-01-18 04:51:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:51:18,696 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:18,696 INFO L225 Difference]: With dead ends: 366 [2022-01-18 04:51:18,696 INFO L226 Difference]: Without dead ends: 318 [2022-01-18 04:51:18,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:51:18,697 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 213 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:18,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 398 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-18 04:51:18,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 208. [2022-01-18 04:51:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.6183574879227054) internal successors, (542), 207 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 542 transitions. [2022-01-18 04:51:18,699 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 542 transitions. Word has length 18 [2022-01-18 04:51:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:18,699 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 542 transitions. [2022-01-18 04:51:18,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 542 transitions. [2022-01-18 04:51:18,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:18,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:18,700 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:18,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 04:51:18,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 04:51:18,915 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1659195445, now seen corresponding path program 115 times [2022-01-18 04:51:18,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132583666] [2022-01-18 04:51:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:18,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:19,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:19,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132583666] [2022-01-18 04:51:19,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132583666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:19,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296120475] [2022-01-18 04:51:19,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:51:19,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:19,108 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) [2022-01-18 04:51:19,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 04:51:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:19,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-01-18 04:51:19,505 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 57 treesize of output 45 [2022-01-18 04:51:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:19,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:19,957 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:19,958 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 144 treesize of output 117 [2022-01-18 04:51:19,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:51:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:20,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296120475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:20,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:20,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-01-18 04:51:20,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344485654] [2022-01-18 04:51:20,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:20,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:51:20,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:51:20,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:51:20,081 INFO L87 Difference]: Start difference. First operand 208 states and 542 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:21,322 INFO L93 Difference]: Finished difference Result 376 states and 835 transitions. [2022-01-18 04:51:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:51:21,322 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:21,323 INFO L225 Difference]: With dead ends: 376 [2022-01-18 04:51:21,323 INFO L226 Difference]: Without dead ends: 342 [2022-01-18 04:51:21,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=319, Invalid=1937, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 04:51:21,324 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 240 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:21,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 313 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-18 04:51:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 217. [2022-01-18 04:51:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.625) internal successors, (567), 216 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) [2022-01-18 04:51:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 567 transitions. [2022-01-18 04:51:21,326 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 567 transitions. Word has length 18 [2022-01-18 04:51:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:21,326 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 567 transitions. [2022-01-18 04:51:21,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 567 transitions. [2022-01-18 04:51:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:21,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:21,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:21,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 04:51:21,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 04:51:21,527 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash 453697611, now seen corresponding path program 116 times [2022-01-18 04:51:21,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:21,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311643865] [2022-01-18 04:51:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:21,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:21,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:21,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311643865] [2022-01-18 04:51:21,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311643865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:21,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313732167] [2022-01-18 04:51:21,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:51:21,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:21,703 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) [2022-01-18 04:51:21,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 04:51:21,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:51:21,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:21,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:21,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:22,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-01-18 04:51:22,108 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 88 treesize of output 72 [2022-01-18 04:51:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:22,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:22,836 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:22,836 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 122 treesize of output 103 [2022-01-18 04:51:22,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-01-18 04:51:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:22,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313732167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:22,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:22,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-01-18 04:51:22,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685986955] [2022-01-18 04:51:22,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:22,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:51:22,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:51:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:51:22,960 INFO L87 Difference]: Start difference. First operand 217 states and 567 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:25,226 INFO L93 Difference]: Finished difference Result 464 states and 962 transitions. [2022-01-18 04:51:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:51:25,227 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:25,227 INFO L225 Difference]: With dead ends: 464 [2022-01-18 04:51:25,227 INFO L226 Difference]: Without dead ends: 406 [2022-01-18 04:51:25,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=397, Invalid=2465, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 04:51:25,228 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 240 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:25,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 524 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:51:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-18 04:51:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 222. [2022-01-18 04:51:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6380090497737556) internal successors, (583), 221 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 583 transitions. [2022-01-18 04:51:25,231 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 583 transitions. Word has length 18 [2022-01-18 04:51:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:25,231 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 583 transitions. [2022-01-18 04:51:25,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 583 transitions. [2022-01-18 04:51:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:25,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:25,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:25,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:25,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 04:51:25,432 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 481187903, now seen corresponding path program 117 times [2022-01-18 04:51:25,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:25,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122665988] [2022-01-18 04:51:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:25,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:25,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:25,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122665988] [2022-01-18 04:51:25,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122665988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:25,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663298434] [2022-01-18 04:51:25,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:51:25,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:25,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:25,654 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) [2022-01-18 04:51:25,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 04:51:25,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:51:25,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:25,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 04:51:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:26,108 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 73 treesize of output 61 [2022-01-18 04:51:26,110 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 61 treesize of output 49 [2022-01-18 04:51:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:26,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:26,534 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:51:26,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 104 [2022-01-18 04:51:26,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 04:51:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:26,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663298434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:26,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:26,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:51:26,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738070117] [2022-01-18 04:51:26,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:26,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:51:26,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:51:26,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:51:26,715 INFO L87 Difference]: Start difference. First operand 222 states and 583 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:29,980 INFO L93 Difference]: Finished difference Result 575 states and 1448 transitions. [2022-01-18 04:51:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 04:51:29,981 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:29,982 INFO L225 Difference]: With dead ends: 575 [2022-01-18 04:51:29,982 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 04:51:29,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1227, Invalid=6605, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 04:51:29,983 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 328 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:29,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 380 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 04:51:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 04:51:29,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 266. [2022-01-18 04:51:29,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.709433962264151) internal successors, (718), 265 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 718 transitions. [2022-01-18 04:51:29,987 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 718 transitions. Word has length 18 [2022-01-18 04:51:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:29,987 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 718 transitions. [2022-01-18 04:51:29,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 718 transitions. [2022-01-18 04:51:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:29,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:29,987 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:30,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 04:51:30,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 04:51:30,188 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:30,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1734485565, now seen corresponding path program 118 times [2022-01-18 04:51:30,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:30,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489877099] [2022-01-18 04:51:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:30,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:30,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:30,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489877099] [2022-01-18 04:51:30,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489877099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:30,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575651243] [2022-01-18 04:51:30,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:51:30,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:30,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:30,345 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) [2022-01-18 04:51:30,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 04:51:30,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:51:30,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:51:30,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:30,707 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 104 treesize of output 88 [2022-01-18 04:51:30,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-01-18 04:51:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:30,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:31,182 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:51:31,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 101 [2022-01-18 04:51:31,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 04:51:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:31,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575651243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:31,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:31,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-01-18 04:51:31,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595990206] [2022-01-18 04:51:31,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:31,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:51:31,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:51:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:51:31,331 INFO L87 Difference]: Start difference. First operand 266 states and 718 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:51:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:33,832 INFO L93 Difference]: Finished difference Result 606 states and 1306 transitions. [2022-01-18 04:51:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 04:51:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:33,833 INFO L225 Difference]: With dead ends: 606 [2022-01-18 04:51:33,833 INFO L226 Difference]: Without dead ends: 552 [2022-01-18 04:51:33,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=699, Invalid=4271, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 04:51:33,834 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 433 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:33,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 504 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:51:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-18 04:51:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 273. [2022-01-18 04:51:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.7058823529411766) internal successors, (736), 272 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 736 transitions. [2022-01-18 04:51:33,838 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 736 transitions. Word has length 18 [2022-01-18 04:51:33,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:33,838 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 736 transitions. [2022-01-18 04:51:33,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:51:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 736 transitions. [2022-01-18 04:51:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:33,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:33,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:33,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:34,040 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,SelfDestructingSolverStorable126 [2022-01-18 04:51:34,040 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:34,040 INFO L85 PathProgramCache]: Analyzing trace with hash 411685195, now seen corresponding path program 119 times [2022-01-18 04:51:34,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:34,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125375086] [2022-01-18 04:51:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:34,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:34,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:34,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125375086] [2022-01-18 04:51:34,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125375086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:34,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870424765] [2022-01-18 04:51:34,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:51:34,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:34,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:34,232 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) [2022-01-18 04:51:34,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 04:51:34,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:51:34,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:34,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:34,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:51:34,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:51:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:34,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:35,284 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:51:35,285 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 116 treesize of output 99 [2022-01-18 04:51:35,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 04:51:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:35,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870424765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:35,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:35,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-01-18 04:51:35,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21445609] [2022-01-18 04:51:35,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:35,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:51:35,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:35,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:51:35,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:51:35,435 INFO L87 Difference]: Start difference. First operand 273 states and 736 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:36,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:36,999 INFO L93 Difference]: Finished difference Result 558 states and 1257 transitions. [2022-01-18 04:51:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 04:51:36,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:36,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:37,000 INFO L225 Difference]: With dead ends: 558 [2022-01-18 04:51:37,000 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 04:51:37,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=396, Invalid=2360, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 04:51:37,001 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 296 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:37,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 459 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:51:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 04:51:37,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 274. [2022-01-18 04:51:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.6996336996337) internal successors, (737), 273 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 737 transitions. [2022-01-18 04:51:37,005 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 737 transitions. Word has length 18 [2022-01-18 04:51:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:37,005 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 737 transitions. [2022-01-18 04:51:37,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 737 transitions. [2022-01-18 04:51:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:37,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:37,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:37,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:37,209 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,SelfDestructingSolverStorable127 [2022-01-18 04:51:37,209 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1981331211, now seen corresponding path program 120 times [2022-01-18 04:51:37,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:37,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996525870] [2022-01-18 04:51:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:37,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:37,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:37,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996525870] [2022-01-18 04:51:37,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996525870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:37,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866080043] [2022-01-18 04:51:37,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:51:37,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:37,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:37,484 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) [2022-01-18 04:51:37,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 04:51:37,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:51:37,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:37,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:37,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-01-18 04:51:37,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 45 [2022-01-18 04:51:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:37,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:38,393 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:38,393 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 147 treesize of output 120 [2022-01-18 04:51:38,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:51:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:38,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866080043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:38,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:38,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:51:38,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065933139] [2022-01-18 04:51:38,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:38,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:51:38,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:51:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:51:38,530 INFO L87 Difference]: Start difference. First operand 274 states and 737 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:39,344 INFO L93 Difference]: Finished difference Result 405 states and 968 transitions. [2022-01-18 04:51:39,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:51:39,344 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:39,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:39,345 INFO L225 Difference]: With dead ends: 405 [2022-01-18 04:51:39,345 INFO L226 Difference]: Without dead ends: 383 [2022-01-18 04:51:39,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 04:51:39,345 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 109 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:39,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 412 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-18 04:51:39,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 288. [2022-01-18 04:51:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.7038327526132404) internal successors, (776), 287 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 776 transitions. [2022-01-18 04:51:39,349 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 776 transitions. Word has length 18 [2022-01-18 04:51:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:39,349 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 776 transitions. [2022-01-18 04:51:39,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 776 transitions. [2022-01-18 04:51:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:39,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:39,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:39,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 04:51:39,550 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,SelfDestructingSolverStorable128 [2022-01-18 04:51:39,550 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:39,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1272060017, now seen corresponding path program 121 times [2022-01-18 04:51:39,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:39,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394756525] [2022-01-18 04:51:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:39,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:39,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:39,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394756525] [2022-01-18 04:51:39,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394756525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:39,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694778073] [2022-01-18 04:51:39,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:51:39,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:39,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:39,802 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) [2022-01-18 04:51:39,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 04:51:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:39,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:39,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:40,310 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 71 treesize of output 59 [2022-01-18 04:51:40,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:51:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:40,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:40,845 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:40,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 117 [2022-01-18 04:51:40,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:51:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:40,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694778073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:40,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:40,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:51:40,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147397265] [2022-01-18 04:51:40,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:40,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:51:40,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:51:40,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:51:40,977 INFO L87 Difference]: Start difference. First operand 288 states and 776 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:41,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:41,906 INFO L93 Difference]: Finished difference Result 436 states and 1019 transitions. [2022-01-18 04:51:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:51:41,906 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:41,907 INFO L225 Difference]: With dead ends: 436 [2022-01-18 04:51:41,907 INFO L226 Difference]: Without dead ends: 416 [2022-01-18 04:51:41,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 04:51:41,907 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:41,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 396 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-18 04:51:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 293. [2022-01-18 04:51:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.708904109589041) internal successors, (791), 292 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 791 transitions. [2022-01-18 04:51:41,911 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 791 transitions. Word has length 18 [2022-01-18 04:51:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:41,911 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 791 transitions. [2022-01-18 04:51:41,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 791 transitions. [2022-01-18 04:51:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:41,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:41,911 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:41,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 04:51:42,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:42,112 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1238460789, now seen corresponding path program 122 times [2022-01-18 04:51:42,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:42,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794083514] [2022-01-18 04:51:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:42,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:42,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:42,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794083514] [2022-01-18 04:51:42,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794083514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:42,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056937679] [2022-01-18 04:51:42,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:51:42,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:42,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:42,389 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) [2022-01-18 04:51:42,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 04:51:42,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:51:42,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:42,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:42,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:42,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:51:42,859 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 59 treesize of output 47 [2022-01-18 04:51:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:42,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:43,420 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:43,420 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 145 treesize of output 118 [2022-01-18 04:51:43,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 81 [2022-01-18 04:51:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:43,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056937679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:43,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:43,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:51:43,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139635838] [2022-01-18 04:51:43,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:43,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:51:43,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:43,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:51:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:51:43,555 INFO L87 Difference]: Start difference. First operand 293 states and 791 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:45,549 INFO L93 Difference]: Finished difference Result 507 states and 1140 transitions. [2022-01-18 04:51:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:51:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:45,550 INFO L225 Difference]: With dead ends: 507 [2022-01-18 04:51:45,550 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 04:51:45,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=340, Invalid=2416, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 04:51:45,551 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 194 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:45,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 364 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 04:51:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 299. [2022-01-18 04:51:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.7248322147651005) internal successors, (812), 298 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 812 transitions. [2022-01-18 04:51:45,554 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 812 transitions. Word has length 18 [2022-01-18 04:51:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:45,555 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 812 transitions. [2022-01-18 04:51:45,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 812 transitions. [2022-01-18 04:51:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:45,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:45,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:45,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:45,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:45,756 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash 840833039, now seen corresponding path program 123 times [2022-01-18 04:51:45,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:45,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004932529] [2022-01-18 04:51:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:45,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:45,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004932529] [2022-01-18 04:51:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004932529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747226285] [2022-01-18 04:51:45,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:51:45,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:45,959 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) [2022-01-18 04:51:45,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 04:51:46,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:51:46,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:46,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 04:51:46,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:46,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 90 [2022-01-18 04:51:46,415 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 90 treesize of output 74 [2022-01-18 04:51:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:46,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:47,134 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:47,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-01-18 04:51:47,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-01-18 04:51:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:47,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747226285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:47,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:47,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:51:47,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461392435] [2022-01-18 04:51:47,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:47,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:51:47,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:51:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:51:47,279 INFO L87 Difference]: Start difference. First operand 299 states and 812 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:49,706 INFO L93 Difference]: Finished difference Result 577 states and 1290 transitions. [2022-01-18 04:51:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 04:51:49,706 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:49,707 INFO L225 Difference]: With dead ends: 577 [2022-01-18 04:51:49,707 INFO L226 Difference]: Without dead ends: 522 [2022-01-18 04:51:49,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 04:51:49,708 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 228 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:49,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 542 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:51:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-18 04:51:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 304. [2022-01-18 04:51:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.735973597359736) internal successors, (829), 303 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 829 transitions. [2022-01-18 04:51:49,712 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 829 transitions. Word has length 18 [2022-01-18 04:51:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:49,712 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 829 transitions. [2022-01-18 04:51:49,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:51:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 829 transitions. [2022-01-18 04:51:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:49,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:49,712 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:49,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 04:51:49,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:49,913 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash 898564883, now seen corresponding path program 124 times [2022-01-18 04:51:49,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:49,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378012663] [2022-01-18 04:51:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:49,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:51:50,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:50,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378012663] [2022-01-18 04:51:50,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378012663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:50,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803250436] [2022-01-18 04:51:50,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:51:50,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:50,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:50,006 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) [2022-01-18 04:51:50,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 04:51:50,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:51:50,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:50,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:51:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:50,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:51:50,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:51:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:51:50,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:50,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:51:50,427 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 41 treesize of output 39 [2022-01-18 04:51:50,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:51:50,432 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 27 [2022-01-18 04:51:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:51:50,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803250436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:50,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:50,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:51:50,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795291219] [2022-01-18 04:51:50,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:50,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:51:50,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:51:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:51:50,479 INFO L87 Difference]: Start difference. First operand 304 states and 829 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:50,636 INFO L93 Difference]: Finished difference Result 352 states and 916 transitions. [2022-01-18 04:51:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:51:50,636 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:50,637 INFO L225 Difference]: With dead ends: 352 [2022-01-18 04:51:50,637 INFO L226 Difference]: Without dead ends: 352 [2022-01-18 04:51:50,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:51:50,637 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:50,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 140 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:51:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-18 04:51:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 304. [2022-01-18 04:51:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.735973597359736) internal successors, (829), 303 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 829 transitions. [2022-01-18 04:51:50,641 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 829 transitions. Word has length 18 [2022-01-18 04:51:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:50,641 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 829 transitions. [2022-01-18 04:51:50,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 829 transitions. [2022-01-18 04:51:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:50,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:50,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:50,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 04:51:50,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:50,843 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:50,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1303681167, now seen corresponding path program 125 times [2022-01-18 04:51:50,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:50,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211185382] [2022-01-18 04:51:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:50,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:51,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:51,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211185382] [2022-01-18 04:51:51,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211185382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:51,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079580338] [2022-01-18 04:51:51,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:51:51,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:51,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:51,101 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) [2022-01-18 04:51:51,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 04:51:51,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:51:51,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:51,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:51,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:51,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:51:51,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:51:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:51,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:52,001 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:52,001 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 145 treesize of output 118 [2022-01-18 04:51:52,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 81 [2022-01-18 04:51:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:52,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079580338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:52,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:52,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:51:52,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156928315] [2022-01-18 04:51:52,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:52,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:51:52,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:51:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:51:52,155 INFO L87 Difference]: Start difference. First operand 304 states and 829 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:51:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:52,871 INFO L93 Difference]: Finished difference Result 434 states and 1058 transitions. [2022-01-18 04:51:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:51:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:52,872 INFO L225 Difference]: With dead ends: 434 [2022-01-18 04:51:52,872 INFO L226 Difference]: Without dead ends: 408 [2022-01-18 04:51:52,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:51:52,872 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:52,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 300 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:51:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-18 04:51:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 312. [2022-01-18 04:51:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.7459807073954985) internal successors, (854), 311 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 854 transitions. [2022-01-18 04:51:52,876 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 854 transitions. Word has length 18 [2022-01-18 04:51:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:52,876 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 854 transitions. [2022-01-18 04:51:52,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:51:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 854 transitions. [2022-01-18 04:51:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:52,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:52,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:52,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:53,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 04:51:53,077 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1337280395, now seen corresponding path program 126 times [2022-01-18 04:51:53,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:53,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262632754] [2022-01-18 04:51:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:53,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:53,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:53,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262632754] [2022-01-18 04:51:53,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262632754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:53,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402597883] [2022-01-18 04:51:53,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:51:53,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:53,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:53,390 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) [2022-01-18 04:51:53,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 04:51:53,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:51:53,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:53,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:53,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:53,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:51:53,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:51:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:53,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:54,331 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:54,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 118 [2022-01-18 04:51:54,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 81 [2022-01-18 04:51:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:54,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402597883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:54,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:54,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:51:54,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662781050] [2022-01-18 04:51:54,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:54,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:51:54,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:51:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:51:54,466 INFO L87 Difference]: Start difference. First operand 312 states and 854 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:51:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:55,818 INFO L93 Difference]: Finished difference Result 495 states and 1167 transitions. [2022-01-18 04:51:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:51:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:55,819 INFO L225 Difference]: With dead ends: 495 [2022-01-18 04:51:55,819 INFO L226 Difference]: Without dead ends: 466 [2022-01-18 04:51:55,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=283, Invalid=1787, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 04:51:55,820 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 141 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:55,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 261 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-18 04:51:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 319. [2022-01-18 04:51:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.7547169811320753) internal successors, (876), 318 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 876 transitions. [2022-01-18 04:51:55,824 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 876 transitions. Word has length 18 [2022-01-18 04:51:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:55,824 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 876 transitions. [2022-01-18 04:51:55,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:51:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 876 transitions. [2022-01-18 04:51:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:55,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:55,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:55,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:56,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 04:51:56,025 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash -878393073, now seen corresponding path program 127 times [2022-01-18 04:51:56,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:56,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556513728] [2022-01-18 04:51:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:56,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:56,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:56,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556513728] [2022-01-18 04:51:56,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556513728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:56,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416689726] [2022-01-18 04:51:56,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:51:56,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:56,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:56,251 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) [2022-01-18 04:51:56,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 04:51:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:56,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:51:56,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:56,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:51:56,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:51:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:56,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:51:57,340 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:51:57,340 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 121 treesize of output 102 [2022-01-18 04:51:57,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 73 [2022-01-18 04:51:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:57,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416689726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:51:57,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:51:57,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-01-18 04:51:57,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450306276] [2022-01-18 04:51:57,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:51:57,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:51:57,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:51:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:51:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:51:57,465 INFO L87 Difference]: Start difference. First operand 319 states and 876 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:51:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:51:58,900 INFO L93 Difference]: Finished difference Result 528 states and 1234 transitions. [2022-01-18 04:51:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:51:58,900 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:51:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:51:58,901 INFO L225 Difference]: With dead ends: 528 [2022-01-18 04:51:58,901 INFO L226 Difference]: Without dead ends: 480 [2022-01-18 04:51:58,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=354, Invalid=1716, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 04:51:58,902 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 253 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:51:58,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 254 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:51:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-18 04:51:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 314. [2022-01-18 04:51:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.7348242811501597) internal successors, (856), 313 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:51:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 856 transitions. [2022-01-18 04:51:58,905 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 856 transitions. Word has length 18 [2022-01-18 04:51:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:51:58,906 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 856 transitions. [2022-01-18 04:51:58,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:51:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 856 transitions. [2022-01-18 04:51:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:51:58,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:51:58,906 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:51:58,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 04:51:59,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 04:51:59,122 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:51:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:51:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash -904944693, now seen corresponding path program 128 times [2022-01-18 04:51:59,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:51:59,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980014304] [2022-01-18 04:51:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:51:59,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:51:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:51:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:59,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:51:59,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980014304] [2022-01-18 04:51:59,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980014304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:51:59,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145406136] [2022-01-18 04:51:59,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:51:59,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:51:59,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:51:59,307 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) [2022-01-18 04:51:59,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 04:51:59,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:51:59,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:51:59,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 04:51:59,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:51:59,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2022-01-18 04:51:59,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:51:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:51:59,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:00,808 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:52:00,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 119 [2022-01-18 04:52:00,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:52:00,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:52:00,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:52:00,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 70 [2022-01-18 04:52:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:00,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145406136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:00,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:00,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:52:00,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481196206] [2022-01-18 04:52:00,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:00,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:52:00,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:52:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:52:00,933 INFO L87 Difference]: Start difference. First operand 314 states and 856 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 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) [2022-01-18 04:52:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:04,005 INFO L93 Difference]: Finished difference Result 530 states and 1248 transitions. [2022-01-18 04:52:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 04:52:04,005 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:04,006 INFO L225 Difference]: With dead ends: 530 [2022-01-18 04:52:04,006 INFO L226 Difference]: Without dead ends: 506 [2022-01-18 04:52:04,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=429, Invalid=3231, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 04:52:04,006 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:04,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 307 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:52:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-18 04:52:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 334. [2022-01-18 04:52:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.75975975975976) internal successors, (919), 333 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 919 transitions. [2022-01-18 04:52:04,015 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 919 transitions. Word has length 18 [2022-01-18 04:52:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:04,015 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 919 transitions. [2022-01-18 04:52:04,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 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) [2022-01-18 04:52:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 919 transitions. [2022-01-18 04:52:04,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:04,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:04,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:04,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:04,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 04:52:04,221 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 34895499, now seen corresponding path program 129 times [2022-01-18 04:52:04,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:04,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212817091] [2022-01-18 04:52:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:04,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:04,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:04,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212817091] [2022-01-18 04:52:04,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212817091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:04,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568601089] [2022-01-18 04:52:04,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:52:04,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:04,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:04,455 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) [2022-01-18 04:52:04,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 04:52:04,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:52:04,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 04:52:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:04,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-01-18 04:52:04,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:52:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:05,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:05,321 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:52:05,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2022-01-18 04:52:05,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-01-18 04:52:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:05,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568601089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:05,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:05,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-01-18 04:52:05,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480041554] [2022-01-18 04:52:05,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:05,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:52:05,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:05,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:52:05,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:52:05,445 INFO L87 Difference]: Start difference. First operand 334 states and 919 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:52:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:07,010 INFO L93 Difference]: Finished difference Result 601 states and 1431 transitions. [2022-01-18 04:52:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 04:52:07,010 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:07,011 INFO L225 Difference]: With dead ends: 601 [2022-01-18 04:52:07,011 INFO L226 Difference]: Without dead ends: 569 [2022-01-18 04:52:07,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=401, Invalid=2461, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 04:52:07,012 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 174 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:07,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 401 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:52:07,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-18 04:52:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 351. [2022-01-18 04:52:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.797142857142857) internal successors, (979), 350 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 979 transitions. [2022-01-18 04:52:07,016 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 979 transitions. Word has length 18 [2022-01-18 04:52:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:07,016 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 979 transitions. [2022-01-18 04:52:07,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:52:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 979 transitions. [2022-01-18 04:52:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:07,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:07,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:07,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:07,226 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,SelfDestructingSolverStorable137 [2022-01-18 04:52:07,226 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:07,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2114189327, now seen corresponding path program 130 times [2022-01-18 04:52:07,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:07,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044749121] [2022-01-18 04:52:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:07,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:07,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:07,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044749121] [2022-01-18 04:52:07,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044749121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:07,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695908834] [2022-01-18 04:52:07,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:52:07,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:07,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:07,403 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) [2022-01-18 04:52:07,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 04:52:07,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:52:07,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:52:07,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:07,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:52:07,726 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 85 treesize of output 69 [2022-01-18 04:52:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:07,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:08,217 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:52:08,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 101 [2022-01-18 04:52:08,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 04:52:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:08,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695908834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:08,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:08,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-01-18 04:52:08,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109423309] [2022-01-18 04:52:08,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:08,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:52:08,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:52:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:52:08,361 INFO L87 Difference]: Start difference. First operand 351 states and 979 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:52:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:10,440 INFO L93 Difference]: Finished difference Result 595 states and 1384 transitions. [2022-01-18 04:52:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 04:52:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:10,441 INFO L225 Difference]: With dead ends: 595 [2022-01-18 04:52:10,441 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 04:52:10,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=593, Invalid=3439, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 04:52:10,442 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 282 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:10,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 376 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:52:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 04:52:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 354. [2022-01-18 04:52:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.7932011331444757) internal successors, (986), 353 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 986 transitions. [2022-01-18 04:52:10,446 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 986 transitions. Word has length 18 [2022-01-18 04:52:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:10,446 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 986 transitions. [2022-01-18 04:52:10,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:52:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 986 transitions. [2022-01-18 04:52:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:10,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:10,447 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:10,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:10,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:10,647 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash -34607209, now seen corresponding path program 131 times [2022-01-18 04:52:10,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:10,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409096631] [2022-01-18 04:52:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:10,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:10,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409096631] [2022-01-18 04:52:10,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409096631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163188695] [2022-01-18 04:52:10,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:52:10,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:10,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:10,821 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) [2022-01-18 04:52:10,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 04:52:10,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:52:10,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:10,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:52:10,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:11,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-01-18 04:52:11,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-01-18 04:52:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:11,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:11,714 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:52:11,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 89 [2022-01-18 04:52:11,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-01-18 04:52:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:11,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163188695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:11,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:11,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:52:11,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733040451] [2022-01-18 04:52:11,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:11,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:52:11,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:11,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:52:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:52:11,839 INFO L87 Difference]: Start difference. First operand 354 states and 986 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:52:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:13,952 INFO L93 Difference]: Finished difference Result 640 states and 1485 transitions. [2022-01-18 04:52:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 04:52:13,952 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:13,954 INFO L225 Difference]: With dead ends: 640 [2022-01-18 04:52:13,954 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 04:52:13,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=525, Invalid=3507, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 04:52:13,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 221 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:13,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 385 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:52:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 04:52:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 351. [2022-01-18 04:52:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.762857142857143) internal successors, (967), 350 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 967 transitions. [2022-01-18 04:52:13,959 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 967 transitions. Word has length 18 [2022-01-18 04:52:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:13,959 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 967 transitions. [2022-01-18 04:52:13,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:52:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 967 transitions. [2022-01-18 04:52:13,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:13,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:13,960 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:13,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:14,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:14,175 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:14,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:14,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2072176911, now seen corresponding path program 132 times [2022-01-18 04:52:14,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:14,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574944181] [2022-01-18 04:52:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:14,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:14,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:14,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574944181] [2022-01-18 04:52:14,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574944181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:14,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192218640] [2022-01-18 04:52:14,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:52:14,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:14,378 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) [2022-01-18 04:52:14,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 04:52:14,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:52:14,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:14,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:14,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:52:14,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:52:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:15,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:15,392 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:52:15,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-01-18 04:52:15,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-01-18 04:52:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:15,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192218640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:15,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:15,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-18 04:52:15,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528592750] [2022-01-18 04:52:15,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:15,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 04:52:15,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 04:52:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:52:15,538 INFO L87 Difference]: Start difference. First operand 351 states and 967 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:52:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:17,640 INFO L93 Difference]: Finished difference Result 630 states and 1460 transitions. [2022-01-18 04:52:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 04:52:17,640 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:17,641 INFO L225 Difference]: With dead ends: 630 [2022-01-18 04:52:17,641 INFO L226 Difference]: Without dead ends: 563 [2022-01-18 04:52:17,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=553, Invalid=2987, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 04:52:17,642 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 224 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:17,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 403 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:52:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-18 04:52:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 357. [2022-01-18 04:52:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.75) internal successors, (979), 356 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 979 transitions. [2022-01-18 04:52:17,646 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 979 transitions. Word has length 18 [2022-01-18 04:52:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:17,646 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 979 transitions. [2022-01-18 04:52:17,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:52:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 979 transitions. [2022-01-18 04:52:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:17,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:17,647 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:17,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:17,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:17,859 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:17,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1507396801, now seen corresponding path program 133 times [2022-01-18 04:52:17,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:17,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715814060] [2022-01-18 04:52:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:17,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:18,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:18,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715814060] [2022-01-18 04:52:18,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715814060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:18,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032074701] [2022-01-18 04:52:18,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:52:18,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:18,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:18,123 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) [2022-01-18 04:52:18,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 04:52:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:18,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 04:52:18,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 04:52:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:18,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:19,076 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:52:19,077 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 144 treesize of output 117 [2022-01-18 04:52:19,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:52:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:19,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032074701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:19,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:19,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:52:19,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090548478] [2022-01-18 04:52:19,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:19,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:52:19,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:52:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:52:19,213 INFO L87 Difference]: Start difference. First operand 357 states and 979 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:20,103 INFO L93 Difference]: Finished difference Result 556 states and 1368 transitions. [2022-01-18 04:52:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:52:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:20,104 INFO L225 Difference]: With dead ends: 556 [2022-01-18 04:52:20,104 INFO L226 Difference]: Without dead ends: 534 [2022-01-18 04:52:20,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:52:20,104 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:20,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 457 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:52:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-18 04:52:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 379. [2022-01-18 04:52:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.7883597883597884) internal successors, (1054), 378 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1054 transitions. [2022-01-18 04:52:20,109 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1054 transitions. Word has length 18 [2022-01-18 04:52:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:20,109 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1054 transitions. [2022-01-18 04:52:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1054 transitions. [2022-01-18 04:52:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:20,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:20,109 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:20,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 04:52:20,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:20,310 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:20,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:20,310 INFO L85 PathProgramCache]: Analyzing trace with hash -465820733, now seen corresponding path program 134 times [2022-01-18 04:52:20,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:20,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889404768] [2022-01-18 04:52:20,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:20,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:20,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889404768] [2022-01-18 04:52:20,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889404768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81888773] [2022-01-18 04:52:20,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:52:20,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:20,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:20,603 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) [2022-01-18 04:52:20,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 04:52:20,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:52:20,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:21,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:52:21,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:52:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:21,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:21,642 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:52:21,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 120 [2022-01-18 04:52:21,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:52:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:21,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81888773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:21,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:21,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:52:21,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609041705] [2022-01-18 04:52:21,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:21,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:52:21,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:52:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:52:21,784 INFO L87 Difference]: Start difference. First operand 379 states and 1054 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:22,796 INFO L93 Difference]: Finished difference Result 606 states and 1452 transitions. [2022-01-18 04:52:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:52:22,796 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:22,797 INFO L225 Difference]: With dead ends: 606 [2022-01-18 04:52:22,797 INFO L226 Difference]: Without dead ends: 579 [2022-01-18 04:52:22,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:52:22,798 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:22,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 404 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:52:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-18 04:52:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 387. [2022-01-18 04:52:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.7979274611398965) internal successors, (1080), 386 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1080 transitions. [2022-01-18 04:52:22,802 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1080 transitions. Word has length 18 [2022-01-18 04:52:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:22,803 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1080 transitions. [2022-01-18 04:52:22,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1080 transitions. [2022-01-18 04:52:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:22,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:22,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:22,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:23,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:23,004 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:23,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:23,004 INFO L85 PathProgramCache]: Analyzing trace with hash -432221505, now seen corresponding path program 135 times [2022-01-18 04:52:23,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:23,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057095518] [2022-01-18 04:52:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:23,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:23,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:23,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057095518] [2022-01-18 04:52:23,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057095518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:23,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497239409] [2022-01-18 04:52:23,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:52:23,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:23,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:23,258 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) [2022-01-18 04:52:23,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 04:52:23,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:52:23,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:23,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:23,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:23,720 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 71 treesize of output 59 [2022-01-18 04:52:23,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:52:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:23,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:24,259 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:52:24,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 120 [2022-01-18 04:52:24,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:52:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:24,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497239409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:24,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:24,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:52:24,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543436419] [2022-01-18 04:52:24,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:24,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:52:24,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:24,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:52:24,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:52:24,397 INFO L87 Difference]: Start difference. First operand 387 states and 1080 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:26,573 INFO L93 Difference]: Finished difference Result 667 states and 1560 transitions. [2022-01-18 04:52:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 04:52:26,573 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:26,574 INFO L225 Difference]: With dead ends: 667 [2022-01-18 04:52:26,574 INFO L226 Difference]: Without dead ends: 628 [2022-01-18 04:52:26,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=360, Invalid=2610, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 04:52:26,574 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 178 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:26,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 378 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:52:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-18 04:52:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 392. [2022-01-18 04:52:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.8030690537084397) internal successors, (1096), 391 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1096 transitions. [2022-01-18 04:52:26,579 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1096 transitions. Word has length 18 [2022-01-18 04:52:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:26,580 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1096 transitions. [2022-01-18 04:52:26,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1096 transitions. [2022-01-18 04:52:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:26,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:26,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:26,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:26,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:26,781 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1647072323, now seen corresponding path program 136 times [2022-01-18 04:52:26,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:26,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299574671] [2022-01-18 04:52:26,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:26,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:26,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:26,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299574671] [2022-01-18 04:52:26,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299574671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:26,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316431363] [2022-01-18 04:52:26,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:52:26,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:26,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:26,975 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) [2022-01-18 04:52:26,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 04:52:27,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:52:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:27,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2022-01-18 04:52:27,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:52:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:27,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:28,275 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:52:28,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 90 [2022-01-18 04:52:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:52:28,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:52:28,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:52:28,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 49 [2022-01-18 04:52:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:28,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316431363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:28,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:28,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:52:28,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298965191] [2022-01-18 04:52:28,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:28,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:52:28,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:52:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:52:28,364 INFO L87 Difference]: Start difference. First operand 392 states and 1096 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:29,997 INFO L93 Difference]: Finished difference Result 668 states and 1618 transitions. [2022-01-18 04:52:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:52:29,997 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:29,998 INFO L225 Difference]: With dead ends: 668 [2022-01-18 04:52:29,998 INFO L226 Difference]: Without dead ends: 638 [2022-01-18 04:52:29,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=314, Invalid=2236, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 04:52:29,999 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 166 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:29,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 449 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:52:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-18 04:52:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 401. [2022-01-18 04:52:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.81) internal successors, (1124), 400 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1124 transitions. [2022-01-18 04:52:30,004 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1124 transitions. Word has length 18 [2022-01-18 04:52:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:30,004 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1124 transitions. [2022-01-18 04:52:30,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1124 transitions. [2022-01-18 04:52:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:30,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:30,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:30,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:30,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 04:52:30,205 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1746635897, now seen corresponding path program 137 times [2022-01-18 04:52:30,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:30,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008620861] [2022-01-18 04:52:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:30,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:30,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008620861] [2022-01-18 04:52:30,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008620861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587427765] [2022-01-18 04:52:30,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:52:30,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:30,399 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) [2022-01-18 04:52:30,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 04:52:30,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:52:30,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:30,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:52:30,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:30,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-01-18 04:52:30,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-01-18 04:52:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:31,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:31,359 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:52:31,359 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 121 treesize of output 102 [2022-01-18 04:52:31,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 73 [2022-01-18 04:52:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587427765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:31,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:31,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:52:31,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119667413] [2022-01-18 04:52:31,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:31,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:52:31,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:52:31,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:52:31,495 INFO L87 Difference]: Start difference. First operand 401 states and 1124 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:32,532 INFO L93 Difference]: Finished difference Result 533 states and 1361 transitions. [2022-01-18 04:52:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:52:32,532 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:32,533 INFO L225 Difference]: With dead ends: 533 [2022-01-18 04:52:32,533 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 04:52:32,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:52:32,533 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:32,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 216 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:52:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 04:52:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 409. [2022-01-18 04:52:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.7916666666666665) internal successors, (1139), 408 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1139 transitions. [2022-01-18 04:52:32,537 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1139 transitions. Word has length 18 [2022-01-18 04:52:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:32,538 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1139 transitions. [2022-01-18 04:52:32,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1139 transitions. [2022-01-18 04:52:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:32,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:32,538 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:32,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:32,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 04:52:32,754 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:32,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1704804167, now seen corresponding path program 138 times [2022-01-18 04:52:32,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:32,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362605389] [2022-01-18 04:52:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:32,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:32,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:32,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362605389] [2022-01-18 04:52:32,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362605389] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:32,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018674250] [2022-01-18 04:52:32,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:52:32,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:32,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:32,870 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) [2022-01-18 04:52:32,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 04:52:32,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:52:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:52:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:33,125 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 87 treesize of output 71 [2022-01-18 04:52:33,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:52:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:33,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:33,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:52:33,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-18 04:52:33,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:52:33,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 04:52:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:33,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018674250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:33,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:33,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:52:33,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391413276] [2022-01-18 04:52:33,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:33,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:52:33,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:33,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:52:33,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:52:33,397 INFO L87 Difference]: Start difference. First operand 409 states and 1139 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:33,854 INFO L93 Difference]: Finished difference Result 505 states and 1318 transitions. [2022-01-18 04:52:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:52:33,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:33,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:33,855 INFO L225 Difference]: With dead ends: 505 [2022-01-18 04:52:33,855 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 04:52:33,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:52:33,855 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:33,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 104 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:52:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 04:52:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 405. [2022-01-18 04:52:33,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.7896039603960396) internal successors, (1127), 404 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1127 transitions. [2022-01-18 04:52:33,860 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1127 transitions. Word has length 18 [2022-01-18 04:52:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:33,860 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1127 transitions. [2022-01-18 04:52:33,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1127 transitions. [2022-01-18 04:52:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:33,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:33,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:33,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 04:52:34,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 04:52:34,061 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash -98705409, now seen corresponding path program 139 times [2022-01-18 04:52:34,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:34,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469707223] [2022-01-18 04:52:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:34,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:34,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:34,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469707223] [2022-01-18 04:52:34,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469707223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:34,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060837466] [2022-01-18 04:52:34,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:52:34,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:34,238 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) [2022-01-18 04:52:34,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 04:52:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:34,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:34,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:52:34,616 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 83 treesize of output 67 [2022-01-18 04:52:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:34,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:35,245 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:52:35,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 04:52:35,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 04:52:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:52:35,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060837466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:35,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:35,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2022-01-18 04:52:35,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126661136] [2022-01-18 04:52:35,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:35,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:52:35,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:35,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:52:35,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:52:35,377 INFO L87 Difference]: Start difference. First operand 405 states and 1127 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:36,161 INFO L93 Difference]: Finished difference Result 553 states and 1381 transitions. [2022-01-18 04:52:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:52:36,161 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:36,162 INFO L225 Difference]: With dead ends: 553 [2022-01-18 04:52:36,162 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 04:52:36,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:52:36,162 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 138 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:36,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 256 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:52:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 04:52:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 411. [2022-01-18 04:52:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.7878048780487803) internal successors, (1143), 410 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1143 transitions. [2022-01-18 04:52:36,167 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1143 transitions. Word has length 18 [2022-01-18 04:52:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:36,167 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1143 transitions. [2022-01-18 04:52:36,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1143 transitions. [2022-01-18 04:52:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:36,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:36,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:36,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:36,368 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,SelfDestructingSolverStorable147 [2022-01-18 04:52:36,368 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1336424373, now seen corresponding path program 140 times [2022-01-18 04:52:36,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:36,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928442814] [2022-01-18 04:52:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:36,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:36,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:36,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928442814] [2022-01-18 04:52:36,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928442814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:36,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653776244] [2022-01-18 04:52:36,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:52:36,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:36,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:36,690 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) [2022-01-18 04:52:36,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 04:52:36,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:52:36,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:36,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:36,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:37,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-01-18 04:52:37,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 45 [2022-01-18 04:52:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:37,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:37,596 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:52:37,596 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 147 treesize of output 120 [2022-01-18 04:52:37,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:52:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:37,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653776244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:37,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:37,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:52:37,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413546122] [2022-01-18 04:52:37,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:37,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:52:37,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:52:37,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:52:37,739 INFO L87 Difference]: Start difference. First operand 411 states and 1143 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:52:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:38,544 INFO L93 Difference]: Finished difference Result 547 states and 1399 transitions. [2022-01-18 04:52:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:52:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:38,545 INFO L225 Difference]: With dead ends: 547 [2022-01-18 04:52:38,545 INFO L226 Difference]: Without dead ends: 527 [2022-01-18 04:52:38,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:52:38,545 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:38,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 322 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:52:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-18 04:52:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 424. [2022-01-18 04:52:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.806146572104019) internal successors, (1187), 423 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1187 transitions. [2022-01-18 04:52:38,550 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1187 transitions. Word has length 18 [2022-01-18 04:52:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:38,550 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1187 transitions. [2022-01-18 04:52:38,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:52:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1187 transitions. [2022-01-18 04:52:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:38,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:38,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:38,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 04:52:38,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:38,763 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:38,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1302825145, now seen corresponding path program 141 times [2022-01-18 04:52:38,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:38,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260217493] [2022-01-18 04:52:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:38,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:39,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:39,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260217493] [2022-01-18 04:52:39,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260217493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:39,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981013490] [2022-01-18 04:52:39,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:52:39,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:39,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:39,089 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) [2022-01-18 04:52:39,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 04:52:39,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:52:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 04:52:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:39,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 04:52:39,589 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 77 treesize of output 61 [2022-01-18 04:52:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:39,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:40,270 INFO L353 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-01-18 04:52:40,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 115 [2022-01-18 04:52:40,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:52:40,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:52:40,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:52:40,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 68 [2022-01-18 04:52:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:40,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981013490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:40,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:40,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:52:40,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534925805] [2022-01-18 04:52:40,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:40,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:52:40,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:40,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:52:40,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:52:40,431 INFO L87 Difference]: Start difference. First operand 424 states and 1187 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:43,204 INFO L93 Difference]: Finished difference Result 672 states and 1636 transitions. [2022-01-18 04:52:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 04:52:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:43,206 INFO L225 Difference]: With dead ends: 672 [2022-01-18 04:52:43,206 INFO L226 Difference]: Without dead ends: 651 [2022-01-18 04:52:43,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=393, Invalid=2577, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 04:52:43,206 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 216 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:43,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 386 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:52:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-01-18 04:52:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 435. [2022-01-18 04:52:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.824884792626728) internal successors, (1226), 434 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1226 transitions. [2022-01-18 04:52:43,212 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1226 transitions. Word has length 18 [2022-01-18 04:52:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:43,212 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1226 transitions. [2022-01-18 04:52:43,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:52:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1226 transitions. [2022-01-18 04:52:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:43,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:43,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:43,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:43,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:43,413 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 776468683, now seen corresponding path program 142 times [2022-01-18 04:52:43,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:43,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106073424] [2022-01-18 04:52:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:43,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:43,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:43,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106073424] [2022-01-18 04:52:43,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106073424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:43,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713616375] [2022-01-18 04:52:43,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:52:43,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:43,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:43,631 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) [2022-01-18 04:52:43,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 04:52:43,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:52:43,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:43,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:43,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:44,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 100 [2022-01-18 04:52:44,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-01-18 04:52:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:44,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:45,045 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:52:45,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 104 [2022-01-18 04:52:45,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:52:45,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:52:45,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:52:45,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 59 [2022-01-18 04:52:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:45,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713616375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:45,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:45,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-18 04:52:45,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536683327] [2022-01-18 04:52:45,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:45,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 04:52:45,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 04:52:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:52:45,137 INFO L87 Difference]: Start difference. First operand 435 states and 1226 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:52:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:47,438 INFO L93 Difference]: Finished difference Result 697 states and 1688 transitions. [2022-01-18 04:52:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 04:52:47,438 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:47,439 INFO L225 Difference]: With dead ends: 697 [2022-01-18 04:52:47,439 INFO L226 Difference]: Without dead ends: 667 [2022-01-18 04:52:47,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=435, Invalid=2535, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 04:52:47,440 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 213 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:47,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 462 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:52:47,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-18 04:52:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 443. [2022-01-18 04:52:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 2.839366515837104) internal successors, (1255), 442 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1255 transitions. [2022-01-18 04:52:47,446 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1255 transitions. Word has length 18 [2022-01-18 04:52:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:47,446 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1255 transitions. [2022-01-18 04:52:47,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:52:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1255 transitions. [2022-01-18 04:52:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:47,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:47,446 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:47,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:47,661 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,SelfDestructingSolverStorable150 [2022-01-18 04:52:47,662 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:47,662 INFO L85 PathProgramCache]: Analyzing trace with hash -51597753, now seen corresponding path program 143 times [2022-01-18 04:52:47,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:47,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302157099] [2022-01-18 04:52:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:47,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:47,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:47,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302157099] [2022-01-18 04:52:47,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302157099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:47,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892549636] [2022-01-18 04:52:47,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:52:47,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:47,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:47,772 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) [2022-01-18 04:52:47,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 04:52:47,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:52:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:47,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:52:47,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:47,975 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 89 treesize of output 73 [2022-01-18 04:52:47,977 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 73 treesize of output 57 [2022-01-18 04:52:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:48,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:48,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:52:48,180 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 35 treesize of output 35 [2022-01-18 04:52:48,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:52:48,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 04:52:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:48,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892549636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:48,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:48,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:52:48,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591456809] [2022-01-18 04:52:48,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:48,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:52:48,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:48,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:52:48,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:52:48,282 INFO L87 Difference]: Start difference. First operand 443 states and 1255 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:48,458 INFO L93 Difference]: Finished difference Result 515 states and 1391 transitions. [2022-01-18 04:52:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:52:48,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:48,459 INFO L225 Difference]: With dead ends: 515 [2022-01-18 04:52:48,459 INFO L226 Difference]: Without dead ends: 512 [2022-01-18 04:52:48,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:52:48,460 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:48,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 109 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:52:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-18 04:52:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 446. [2022-01-18 04:52:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.831460674157303) internal successors, (1260), 445 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1260 transitions. [2022-01-18 04:52:48,465 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1260 transitions. Word has length 18 [2022-01-18 04:52:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:48,465 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1260 transitions. [2022-01-18 04:52:48,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1260 transitions. [2022-01-18 04:52:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:48,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:48,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:48,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:48,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:48,666 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1396253697, now seen corresponding path program 144 times [2022-01-18 04:52:48,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:48,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878057886] [2022-01-18 04:52:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:48,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:48,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878057886] [2022-01-18 04:52:48,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878057886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450750756] [2022-01-18 04:52:48,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:52:48,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:48,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:48,921 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) [2022-01-18 04:52:48,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 04:52:48,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:52:48,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:48,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:48,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:49,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:52:49,265 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 83 treesize of output 67 [2022-01-18 04:52:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:49,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:49,771 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:52:49,771 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 110 treesize of output 97 [2022-01-18 04:52:49,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2022-01-18 04:52:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:49,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450750756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:49,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:49,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:52:49,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000469807] [2022-01-18 04:52:49,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:49,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:52:49,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:52:49,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:52:49,912 INFO L87 Difference]: Start difference. First operand 446 states and 1260 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:52:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:51,717 INFO L93 Difference]: Finished difference Result 635 states and 1567 transitions. [2022-01-18 04:52:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:52:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:51,719 INFO L225 Difference]: With dead ends: 635 [2022-01-18 04:52:51,719 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 04:52:51,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=444, Invalid=2526, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 04:52:51,719 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:51,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 459 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:52:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 04:52:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 450. [2022-01-18 04:52:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.8351893095768372) internal successors, (1273), 449 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1273 transitions. [2022-01-18 04:52:51,724 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1273 transitions. Word has length 18 [2022-01-18 04:52:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:51,724 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1273 transitions. [2022-01-18 04:52:51,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:52:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1273 transitions. [2022-01-18 04:52:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:51,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:51,725 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:51,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-18 04:52:51,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:51,925 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash 749917063, now seen corresponding path program 145 times [2022-01-18 04:52:51,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:51,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493508823] [2022-01-18 04:52:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:51,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:52,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:52,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493508823] [2022-01-18 04:52:52,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493508823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:52,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801724527] [2022-01-18 04:52:52,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:52:52,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:52,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:52,110 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) [2022-01-18 04:52:52,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 04:52:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:52,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:52,482 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 99 treesize of output 83 [2022-01-18 04:52:52,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:52:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:52,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:53,005 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:52:53,005 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 106 treesize of output 93 [2022-01-18 04:52:53,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:52:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:53,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801724527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:53,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:53,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:52:53,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774962298] [2022-01-18 04:52:53,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:53,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:52:53,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:53,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:52:53,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:52:53,145 INFO L87 Difference]: Start difference. First operand 450 states and 1273 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:52:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:54,944 INFO L93 Difference]: Finished difference Result 657 states and 1595 transitions. [2022-01-18 04:52:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:52:54,944 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:54,945 INFO L225 Difference]: With dead ends: 657 [2022-01-18 04:52:54,945 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 04:52:54,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=476, Invalid=2386, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 04:52:54,945 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 235 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:54,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 364 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:52:54,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 04:52:54,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 450. [2022-01-18 04:52:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.826280623608018) internal successors, (1269), 449 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1269 transitions. [2022-01-18 04:52:54,950 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1269 transitions. Word has length 18 [2022-01-18 04:52:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:54,951 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1269 transitions. [2022-01-18 04:52:54,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:52:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1269 transitions. [2022-01-18 04:52:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:54,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:54,951 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:54,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:55,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:55,152 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:55,152 INFO L85 PathProgramCache]: Analyzing trace with hash -552467833, now seen corresponding path program 146 times [2022-01-18 04:52:55,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:55,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033345857] [2022-01-18 04:52:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:55,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:55,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:55,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033345857] [2022-01-18 04:52:55,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033345857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:55,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964377176] [2022-01-18 04:52:55,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:52:55,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:55,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:55,332 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) [2022-01-18 04:52:55,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 04:52:55,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:52:55,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:55,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:52:55,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:55,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:52:55,710 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 85 treesize of output 69 [2022-01-18 04:52:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:55,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:56,374 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:52:56,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-01-18 04:52:56,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-01-18 04:52:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:52:56,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964377176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:56,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:56,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:52:56,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21004929] [2022-01-18 04:52:56,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:56,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:52:56,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:52:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:52:56,506 INFO L87 Difference]: Start difference. First operand 450 states and 1269 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:52:57,923 INFO L93 Difference]: Finished difference Result 668 states and 1645 transitions. [2022-01-18 04:52:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:52:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:52:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:52:57,924 INFO L225 Difference]: With dead ends: 668 [2022-01-18 04:52:57,924 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 04:52:57,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 04:52:57,924 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 136 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:52:57,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 276 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:52:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 04:52:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 462. [2022-01-18 04:52:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.839479392624729) internal successors, (1309), 461 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1309 transitions. [2022-01-18 04:52:57,930 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1309 transitions. Word has length 18 [2022-01-18 04:52:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:52:57,930 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1309 transitions. [2022-01-18 04:52:57,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:52:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1309 transitions. [2022-01-18 04:52:57,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:52:57,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:52:57,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:52:57,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 04:52:58,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:58,131 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:52:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:52:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash -915267137, now seen corresponding path program 147 times [2022-01-18 04:52:58,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:52:58,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521680199] [2022-01-18 04:52:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:52:58,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:52:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:52:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:58,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:52:58,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521680199] [2022-01-18 04:52:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521680199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:52:58,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120974173] [2022-01-18 04:52:58,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:52:58,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:52:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:52:58,391 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) [2022-01-18 04:52:58,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 04:52:58,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:52:58,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:52:58,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 04:52:58,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:52:58,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:52:58,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:52:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:58,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:52:59,191 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:52:59,191 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 125 treesize of output 108 [2022-01-18 04:52:59,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-01-18 04:52:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:52:59,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120974173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:52:59,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:52:59,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:52:59,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990853434] [2022-01-18 04:52:59,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:52:59,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:52:59,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:52:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:52:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:52:59,328 INFO L87 Difference]: Start difference. First operand 462 states and 1309 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:00,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:00,571 INFO L93 Difference]: Finished difference Result 664 states and 1666 transitions. [2022-01-18 04:53:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:53:00,571 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:00,572 INFO L225 Difference]: With dead ends: 664 [2022-01-18 04:53:00,572 INFO L226 Difference]: Without dead ends: 619 [2022-01-18 04:53:00,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:53:00,572 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 200 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:00,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 330 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:53:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-18 04:53:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 477. [2022-01-18 04:53:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.8403361344537816) internal successors, (1352), 476 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1352 transitions. [2022-01-18 04:53:00,578 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1352 transitions. Word has length 18 [2022-01-18 04:53:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:00,578 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1352 transitions. [2022-01-18 04:53:00,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1352 transitions. [2022-01-18 04:53:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:00,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:00,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:00,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-18 04:53:00,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-18 04:53:00,779 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:00,779 INFO L85 PathProgramCache]: Analyzing trace with hash -984769845, now seen corresponding path program 148 times [2022-01-18 04:53:00,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:00,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149632229] [2022-01-18 04:53:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:00,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:00,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:00,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149632229] [2022-01-18 04:53:00,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149632229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:00,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819762710] [2022-01-18 04:53:00,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:53:00,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:00,957 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) [2022-01-18 04:53:00,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 04:53:01,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:53:01,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:01,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:53:01,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:01,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 04:53:01,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:53:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:01,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:02,228 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:53:02,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 90 [2022-01-18 04:53:02,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:53:02,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:53:02,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:53:02,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 49 [2022-01-18 04:53:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:02,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819762710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:02,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:02,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:53:02,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135304654] [2022-01-18 04:53:02,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:02,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:53:02,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:02,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:53:02,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:53:02,354 INFO L87 Difference]: Start difference. First operand 477 states and 1352 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:05,723 INFO L93 Difference]: Finished difference Result 751 states and 1842 transitions. [2022-01-18 04:53:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 04:53:05,723 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:05,724 INFO L225 Difference]: With dead ends: 751 [2022-01-18 04:53:05,724 INFO L226 Difference]: Without dead ends: 701 [2022-01-18 04:53:05,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=656, Invalid=4174, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 04:53:05,725 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 307 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:05,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 348 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:53:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-18 04:53:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 500. [2022-01-18 04:53:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.8657314629258517) internal successors, (1430), 499 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1430 transitions. [2022-01-18 04:53:05,731 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1430 transitions. Word has length 18 [2022-01-18 04:53:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:05,731 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1430 transitions. [2022-01-18 04:53:05,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1430 transitions. [2022-01-18 04:53:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:05,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:05,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:05,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 04:53:05,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 04:53:05,932 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:05,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1122014275, now seen corresponding path program 149 times [2022-01-18 04:53:05,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:05,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089913388] [2022-01-18 04:53:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:05,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:06,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:06,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089913388] [2022-01-18 04:53:06,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089913388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:06,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005845103] [2022-01-18 04:53:06,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:53:06,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:06,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:06,113 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) [2022-01-18 04:53:06,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 04:53:06,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:53:06,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:53:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:06,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:53:06,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:53:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:06,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:07,076 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:53:07,077 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 119 treesize of output 100 [2022-01-18 04:53:07,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-01-18 04:53:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:53:07,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005845103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:07,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:07,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:53:07,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660730961] [2022-01-18 04:53:07,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:07,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:53:07,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:07,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:53:07,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:53:07,211 INFO L87 Difference]: Start difference. First operand 500 states and 1430 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:53:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:09,516 INFO L93 Difference]: Finished difference Result 695 states and 1752 transitions. [2022-01-18 04:53:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 04:53:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:09,517 INFO L225 Difference]: With dead ends: 695 [2022-01-18 04:53:09,517 INFO L226 Difference]: Without dead ends: 632 [2022-01-18 04:53:09,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=515, Invalid=2907, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 04:53:09,518 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 278 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:09,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 342 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:53:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-01-18 04:53:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 496. [2022-01-18 04:53:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 2.8505050505050504) internal successors, (1411), 495 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1411 transitions. [2022-01-18 04:53:09,523 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1411 transitions. Word has length 18 [2022-01-18 04:53:09,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:09,523 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1411 transitions. [2022-01-18 04:53:09,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:53:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1411 transitions. [2022-01-18 04:53:09,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:09,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:09,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:09,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 04:53:09,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 04:53:09,724 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2007812555, now seen corresponding path program 150 times [2022-01-18 04:53:09,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:09,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865528645] [2022-01-18 04:53:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:09,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:09,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:09,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865528645] [2022-01-18 04:53:09,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865528645] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:09,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608043545] [2022-01-18 04:53:09,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:53:09,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:09,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:09,920 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) [2022-01-18 04:53:09,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 04:53:09,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:53:09,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:09,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:53:09,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:10,316 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 93 treesize of output 77 [2022-01-18 04:53:10,318 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 77 treesize of output 61 [2022-01-18 04:53:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:10,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:10,986 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:53:10,987 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 120 treesize of output 101 [2022-01-18 04:53:10,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 72 [2022-01-18 04:53:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:11,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608043545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:11,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:11,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:53:11,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240143413] [2022-01-18 04:53:11,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:11,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:53:11,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:11,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:53:11,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:53:11,099 INFO L87 Difference]: Start difference. First operand 496 states and 1411 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:14,258 INFO L93 Difference]: Finished difference Result 783 states and 1914 transitions. [2022-01-18 04:53:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 04:53:14,259 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:14,260 INFO L225 Difference]: With dead ends: 783 [2022-01-18 04:53:14,260 INFO L226 Difference]: Without dead ends: 704 [2022-01-18 04:53:14,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=565, Invalid=3857, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 04:53:14,260 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 289 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:14,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 486 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:53:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-01-18 04:53:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 499. [2022-01-18 04:53:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.8393574297188753) internal successors, (1414), 498 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1414 transitions. [2022-01-18 04:53:14,266 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1414 transitions. Word has length 18 [2022-01-18 04:53:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:14,266 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1414 transitions. [2022-01-18 04:53:14,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1414 transitions. [2022-01-18 04:53:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:14,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:14,267 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:14,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 04:53:14,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 04:53:14,468 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2024987449, now seen corresponding path program 151 times [2022-01-18 04:53:14,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:14,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729705129] [2022-01-18 04:53:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:14,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:14,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:14,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729705129] [2022-01-18 04:53:14,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729705129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:14,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470268221] [2022-01-18 04:53:14,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:53:14,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:14,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:14,737 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) [2022-01-18 04:53:14,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 04:53:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:53:14,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:15,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-01-18 04:53:15,134 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 57 treesize of output 45 [2022-01-18 04:53:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:15,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:15,615 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:53:15,616 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 117 [2022-01-18 04:53:15,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:53:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:15,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470268221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:15,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:15,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:53:15,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88419571] [2022-01-18 04:53:15,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:15,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:53:15,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:53:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:53:15,744 INFO L87 Difference]: Start difference. First operand 499 states and 1414 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:16,721 INFO L93 Difference]: Finished difference Result 674 states and 1734 transitions. [2022-01-18 04:53:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:53:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:16,722 INFO L225 Difference]: With dead ends: 674 [2022-01-18 04:53:16,722 INFO L226 Difference]: Without dead ends: 652 [2022-01-18 04:53:16,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=247, Invalid=1733, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:53:16,723 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 100 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:16,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 457 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:53:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-18 04:53:16,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 517. [2022-01-18 04:53:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.858527131782946) internal successors, (1475), 516 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1475 transitions. [2022-01-18 04:53:16,728 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1475 transitions. Word has length 18 [2022-01-18 04:53:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:16,728 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1475 transitions. [2022-01-18 04:53:16,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1475 transitions. [2022-01-18 04:53:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:16,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:16,729 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:16,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-18 04:53:16,943 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,SelfDestructingSolverStorable159 [2022-01-18 04:53:16,943 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash -983411381, now seen corresponding path program 152 times [2022-01-18 04:53:16,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:16,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449573652] [2022-01-18 04:53:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:16,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:17,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:17,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449573652] [2022-01-18 04:53:17,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449573652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:17,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797676416] [2022-01-18 04:53:17,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:53:17,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:17,246 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) [2022-01-18 04:53:17,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 04:53:17,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:53:17,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:17,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:53:17,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:17,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 04:53:17,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 04:53:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:17,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:18,234 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:53:18,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 120 [2022-01-18 04:53:18,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:53:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:18,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797676416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:18,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:18,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:53:18,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241246717] [2022-01-18 04:53:18,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:18,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:53:18,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:53:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:53:18,369 INFO L87 Difference]: Start difference. First operand 517 states and 1475 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:19,435 INFO L93 Difference]: Finished difference Result 726 states and 1823 transitions. [2022-01-18 04:53:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:53:19,435 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:19,436 INFO L225 Difference]: With dead ends: 726 [2022-01-18 04:53:19,436 INFO L226 Difference]: Without dead ends: 699 [2022-01-18 04:53:19,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 04:53:19,437 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 107 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:19,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 372 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:53:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-18 04:53:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 523. [2022-01-18 04:53:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.8620689655172415) internal successors, (1494), 522 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1494 transitions. [2022-01-18 04:53:19,443 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1494 transitions. Word has length 18 [2022-01-18 04:53:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:19,443 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 1494 transitions. [2022-01-18 04:53:19,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1494 transitions. [2022-01-18 04:53:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:19,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:19,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:19,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 04:53:19,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:19,644 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash -949812153, now seen corresponding path program 153 times [2022-01-18 04:53:19,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:19,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985863226] [2022-01-18 04:53:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:19,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:19,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:19,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985863226] [2022-01-18 04:53:19,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985863226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:19,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694841314] [2022-01-18 04:53:19,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:53:19,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:19,958 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) [2022-01-18 04:53:19,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 04:53:20,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:53:20,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:20,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:53:20,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:20,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-01-18 04:53:20,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:53:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:20,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:21,021 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:53:21,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 117 [2022-01-18 04:53:21,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:53:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:21,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694841314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:21,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:21,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:53:21,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369231909] [2022-01-18 04:53:21,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:21,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:53:21,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:21,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:53:21,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:53:21,131 INFO L87 Difference]: Start difference. First operand 523 states and 1494 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:24,078 INFO L93 Difference]: Finished difference Result 784 states and 1941 transitions. [2022-01-18 04:53:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 04:53:24,079 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:24,079 INFO L225 Difference]: With dead ends: 784 [2022-01-18 04:53:24,080 INFO L226 Difference]: Without dead ends: 738 [2022-01-18 04:53:24,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 04:53:24,080 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 215 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:24,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 370 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:53:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-01-18 04:53:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 526. [2022-01-18 04:53:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.859047619047619) internal successors, (1501), 525 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1501 transitions. [2022-01-18 04:53:24,086 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1501 transitions. Word has length 18 [2022-01-18 04:53:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:24,086 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1501 transitions. [2022-01-18 04:53:24,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1501 transitions. [2022-01-18 04:53:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:24,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:24,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:24,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 04:53:24,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:24,303 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:24,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1129481675, now seen corresponding path program 154 times [2022-01-18 04:53:24,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:24,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038071541] [2022-01-18 04:53:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:24,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:24,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:24,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038071541] [2022-01-18 04:53:24,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038071541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:24,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180926919] [2022-01-18 04:53:24,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:53:24,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:24,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:24,492 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) [2022-01-18 04:53:24,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 04:53:24,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:53:24,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:24,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 04:53:24,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:24,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2022-01-18 04:53:24,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:53:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:25,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:26,087 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:53:26,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 117 [2022-01-18 04:53:26,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:53:26,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:53:26,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:53:26,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 68 [2022-01-18 04:53:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:26,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180926919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:26,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:26,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-01-18 04:53:26,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68371290] [2022-01-18 04:53:26,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:26,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 04:53:26,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 04:53:26,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:53:26,224 INFO L87 Difference]: Start difference. First operand 526 states and 1501 transitions. Second operand has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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) [2022-01-18 04:53:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:29,435 INFO L93 Difference]: Finished difference Result 813 states and 1995 transitions. [2022-01-18 04:53:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 04:53:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:29,437 INFO L225 Difference]: With dead ends: 813 [2022-01-18 04:53:29,437 INFO L226 Difference]: Without dead ends: 780 [2022-01-18 04:53:29,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=560, Invalid=3346, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 04:53:29,437 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 308 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:29,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 379 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:53:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-18 04:53:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 538. [2022-01-18 04:53:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.8696461824953445) internal successors, (1541), 537 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1541 transitions. [2022-01-18 04:53:29,444 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1541 transitions. Word has length 18 [2022-01-18 04:53:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:29,444 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1541 transitions. [2022-01-18 04:53:29,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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) [2022-01-18 04:53:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1541 transitions. [2022-01-18 04:53:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:29,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:29,445 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:29,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 04:53:29,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:29,645 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2030740751, now seen corresponding path program 155 times [2022-01-18 04:53:29,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:29,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534060589] [2022-01-18 04:53:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:29,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:29,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:29,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534060589] [2022-01-18 04:53:29,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534060589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:29,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70786589] [2022-01-18 04:53:29,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:53:29,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:29,862 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) [2022-01-18 04:53:29,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 04:53:29,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:53:29,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:29,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:53:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:30,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-01-18 04:53:30,271 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 88 treesize of output 72 [2022-01-18 04:53:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:30,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:30,799 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:53:30,800 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 119 treesize of output 100 [2022-01-18 04:53:30,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-01-18 04:53:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:53:30,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70786589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:30,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:30,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:53:30,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255179571] [2022-01-18 04:53:30,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:30,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:53:30,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:53:30,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:53:30,923 INFO L87 Difference]: Start difference. First operand 538 states and 1541 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:33,182 INFO L93 Difference]: Finished difference Result 714 states and 1824 transitions. [2022-01-18 04:53:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:53:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:33,183 INFO L225 Difference]: With dead ends: 714 [2022-01-18 04:53:33,183 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 04:53:33,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=480, Invalid=2712, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 04:53:33,184 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 300 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:33,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 330 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:53:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 04:53:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 542. [2022-01-18 04:53:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.870609981515712) internal successors, (1553), 541 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1553 transitions. [2022-01-18 04:53:33,190 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1553 transitions. Word has length 18 [2022-01-18 04:53:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:33,190 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1553 transitions. [2022-01-18 04:53:33,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1553 transitions. [2022-01-18 04:53:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:33,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:33,191 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:33,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-18 04:53:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:33,391 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1187213519, now seen corresponding path program 156 times [2022-01-18 04:53:33,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:33,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938203191] [2022-01-18 04:53:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:33,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:53:33,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938203191] [2022-01-18 04:53:33,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938203191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783043567] [2022-01-18 04:53:33,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:53:33,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:33,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:33,483 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) [2022-01-18 04:53:33,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 04:53:33,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:53:33,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:33,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:53:33,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:33,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:53:33,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:53:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:53:33,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:33,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:53:33,911 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 41 treesize of output 39 [2022-01-18 04:53:33,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:53:33,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 27 [2022-01-18 04:53:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:53:33,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783043567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:33,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:33,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:53:33,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609829260] [2022-01-18 04:53:33,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:33,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:53:33,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:33,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:53:33,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:53:33,978 INFO L87 Difference]: Start difference. First operand 542 states and 1553 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:34,448 INFO L93 Difference]: Finished difference Result 656 states and 1768 transitions. [2022-01-18 04:53:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:53:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:34,449 INFO L225 Difference]: With dead ends: 656 [2022-01-18 04:53:34,449 INFO L226 Difference]: Without dead ends: 653 [2022-01-18 04:53:34,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:53:34,449 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:34,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 113 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:53:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-18 04:53:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 542. [2022-01-18 04:53:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8632162661737524) internal successors, (1549), 541 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1549 transitions. [2022-01-18 04:53:34,455 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1549 transitions. Word has length 18 [2022-01-18 04:53:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:34,455 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1549 transitions. [2022-01-18 04:53:34,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1549 transitions. [2022-01-18 04:53:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:34,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:34,456 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:34,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 04:53:34,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:34,656 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash -172903221, now seen corresponding path program 157 times [2022-01-18 04:53:34,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:34,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193208930] [2022-01-18 04:53:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:34,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:34,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193208930] [2022-01-18 04:53:34,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193208930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358033676] [2022-01-18 04:53:34,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:53:34,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:34,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:34,853 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) [2022-01-18 04:53:34,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 04:53:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 04:53:34,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:35,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-01-18 04:53:35,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:53:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:35,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:36,374 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:53:36,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 120 [2022-01-18 04:53:36,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:53:36,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:53:36,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:53:36,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 67 [2022-01-18 04:53:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:36,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358033676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:36,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:36,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:53:36,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923957145] [2022-01-18 04:53:36,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:36,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:53:36,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:53:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:53:36,494 INFO L87 Difference]: Start difference. First operand 542 states and 1549 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:41,629 INFO L93 Difference]: Finished difference Result 875 states and 2130 transitions. [2022-01-18 04:53:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 04:53:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:41,630 INFO L225 Difference]: With dead ends: 875 [2022-01-18 04:53:41,630 INFO L226 Difference]: Without dead ends: 817 [2022-01-18 04:53:41,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=777, Invalid=4335, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 04:53:41,631 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 182 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:41,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 509 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:53:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-18 04:53:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 559. [2022-01-18 04:53:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.881720430107527) internal successors, (1608), 558 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1608 transitions. [2022-01-18 04:53:41,637 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1608 transitions. Word has length 18 [2022-01-18 04:53:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:41,638 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1608 transitions. [2022-01-18 04:53:41,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:53:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1608 transitions. [2022-01-18 04:53:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:41,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:41,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:41,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-01-18 04:53:41,838 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,SelfDestructingSolverStorable165 [2022-01-18 04:53:41,839 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:41,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1973267539, now seen corresponding path program 158 times [2022-01-18 04:53:41,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:41,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992601774] [2022-01-18 04:53:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:41,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:42,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:42,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992601774] [2022-01-18 04:53:42,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992601774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:42,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168397829] [2022-01-18 04:53:42,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:53:42,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:42,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:42,041 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) [2022-01-18 04:53:42,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 04:53:42,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:53:42,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:42,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:53:42,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:42,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:53:42,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:53:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:42,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:42,948 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:53:42,948 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 106 treesize of output 93 [2022-01-18 04:53:42,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:53:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:43,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168397829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:43,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:43,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:53:43,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185425562] [2022-01-18 04:53:43,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:43,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:53:43,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:43,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:53:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:53:43,090 INFO L87 Difference]: Start difference. First operand 559 states and 1608 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:43,928 INFO L93 Difference]: Finished difference Result 723 states and 1890 transitions. [2022-01-18 04:53:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:53:43,928 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:43,929 INFO L225 Difference]: With dead ends: 723 [2022-01-18 04:53:43,929 INFO L226 Difference]: Without dead ends: 687 [2022-01-18 04:53:43,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 04:53:43,929 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 162 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:43,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 364 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:53:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-18 04:53:43,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 559. [2022-01-18 04:53:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.879928315412186) internal successors, (1607), 558 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1607 transitions. [2022-01-18 04:53:43,936 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1607 transitions. Word has length 18 [2022-01-18 04:53:43,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:43,936 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1607 transitions. [2022-01-18 04:53:43,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1607 transitions. [2022-01-18 04:53:43,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:43,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:43,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:43,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 04:53:44,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:44,137 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:44,137 INFO L85 PathProgramCache]: Analyzing trace with hash -616296057, now seen corresponding path program 159 times [2022-01-18 04:53:44,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:44,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918133808] [2022-01-18 04:53:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:44,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:44,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:44,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918133808] [2022-01-18 04:53:44,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918133808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:44,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532810313] [2022-01-18 04:53:44,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:53:44,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:44,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:44,330 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) [2022-01-18 04:53:44,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 04:53:44,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:53:44,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:44,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 04:53:44,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:44,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:53:44,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:53:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:44,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:45,263 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:53:45,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 95 [2022-01-18 04:53:45,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2022-01-18 04:53:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:53:45,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532810313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:45,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:45,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2022-01-18 04:53:45,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843175849] [2022-01-18 04:53:45,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:45,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:53:45,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:45,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:53:45,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:53:45,388 INFO L87 Difference]: Start difference. First operand 559 states and 1607 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:46,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:46,156 INFO L93 Difference]: Finished difference Result 694 states and 1839 transitions. [2022-01-18 04:53:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:53:46,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:46,157 INFO L225 Difference]: With dead ends: 694 [2022-01-18 04:53:46,157 INFO L226 Difference]: Without dead ends: 667 [2022-01-18 04:53:46,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:53:46,158 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 173 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:46,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 252 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:53:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-18 04:53:46,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 563. [2022-01-18 04:53:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.880782918149466) internal successors, (1619), 562 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1619 transitions. [2022-01-18 04:53:46,164 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1619 transitions. Word has length 18 [2022-01-18 04:53:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:46,164 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1619 transitions. [2022-01-18 04:53:46,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1619 transitions. [2022-01-18 04:53:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:46,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:46,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:46,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 04:53:46,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:46,365 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash 323544135, now seen corresponding path program 160 times [2022-01-18 04:53:46,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:46,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724696266] [2022-01-18 04:53:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:46,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:46,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724696266] [2022-01-18 04:53:46,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724696266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80019592] [2022-01-18 04:53:46,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:53:46,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:46,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:46,658 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) [2022-01-18 04:53:46,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 04:53:46,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:53:46,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:53:46,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:47,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:53:47,094 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 59 treesize of output 47 [2022-01-18 04:53:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:47,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:47,478 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:53:47,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2022-01-18 04:53:47,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-01-18 04:53:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:53:47,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80019592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:47,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:47,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:53:47,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048183150] [2022-01-18 04:53:47,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:47,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:53:47,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:47,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:53:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:53:47,610 INFO L87 Difference]: Start difference. First operand 563 states and 1619 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:48,949 INFO L93 Difference]: Finished difference Result 762 states and 1978 transitions. [2022-01-18 04:53:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:53:48,949 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:48,950 INFO L225 Difference]: With dead ends: 762 [2022-01-18 04:53:48,950 INFO L226 Difference]: Without dead ends: 730 [2022-01-18 04:53:48,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 04:53:48,950 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 222 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:48,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 287 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:53:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-01-18 04:53:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 578. [2022-01-18 04:53:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.8942807625649913) internal successors, (1670), 577 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1670 transitions. [2022-01-18 04:53:48,957 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1670 transitions. Word has length 18 [2022-01-18 04:53:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:48,957 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1670 transitions. [2022-01-18 04:53:48,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1670 transitions. [2022-01-18 04:53:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:48,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:48,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:48,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-01-18 04:53:49,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 04:53:49,158 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:49,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1892129333, now seen corresponding path program 161 times [2022-01-18 04:53:49,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:49,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748337415] [2022-01-18 04:53:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:49,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:49,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:49,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748337415] [2022-01-18 04:53:49,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748337415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:49,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363228700] [2022-01-18 04:53:49,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:53:49,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:49,333 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) [2022-01-18 04:53:49,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 04:53:49,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:53:49,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:53:49,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:49,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:53:49,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:53:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:49,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:50,246 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:53:50,247 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 106 treesize of output 93 [2022-01-18 04:53:50,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:53:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:53:50,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363228700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:50,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:50,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:53:50,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445963584] [2022-01-18 04:53:50,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:50,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:53:50,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:53:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:53:50,399 INFO L87 Difference]: Start difference. First operand 578 states and 1670 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:52,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:52,225 INFO L93 Difference]: Finished difference Result 804 states and 2032 transitions. [2022-01-18 04:53:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 04:53:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:52,227 INFO L225 Difference]: With dead ends: 804 [2022-01-18 04:53:52,227 INFO L226 Difference]: Without dead ends: 753 [2022-01-18 04:53:52,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=482, Invalid=2488, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 04:53:52,227 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 199 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:52,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 364 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:53:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-18 04:53:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 578. [2022-01-18 04:53:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.8908145580589255) internal successors, (1668), 577 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1668 transitions. [2022-01-18 04:53:52,234 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1668 transitions. Word has length 18 [2022-01-18 04:53:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:52,234 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1668 transitions. [2022-01-18 04:53:52,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1668 transitions. [2022-01-18 04:53:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:52,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:52,235 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:52,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 04:53:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 04:53:52,435 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash 254041427, now seen corresponding path program 162 times [2022-01-18 04:53:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571886650] [2022-01-18 04:53:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:52,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:52,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571886650] [2022-01-18 04:53:52,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571886650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349799792] [2022-01-18 04:53:52,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:53:52,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:52,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:52,628 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) [2022-01-18 04:53:52,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 04:53:52,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:53:52,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:53:52,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:53:52,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:52,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:53:52,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:53:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:53,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:53,564 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:53:53,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 93 [2022-01-18 04:53:53,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:53:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:53:53,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349799792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:53,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:53,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:53:53,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146335330] [2022-01-18 04:53:53,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:53,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:53:53,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:53,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:53:53,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:53:53,710 INFO L87 Difference]: Start difference. First operand 578 states and 1668 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:53:55,659 INFO L93 Difference]: Finished difference Result 801 states and 2030 transitions. [2022-01-18 04:53:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 04:53:55,659 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:53:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:53:55,660 INFO L225 Difference]: With dead ends: 801 [2022-01-18 04:53:55,660 INFO L226 Difference]: Without dead ends: 751 [2022-01-18 04:53:55,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=448, Invalid=2414, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 04:53:55,661 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 177 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:53:55,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 396 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:53:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-18 04:53:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 580. [2022-01-18 04:53:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.8894645941278068) internal successors, (1673), 579 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:53:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1673 transitions. [2022-01-18 04:53:55,667 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1673 transitions. Word has length 18 [2022-01-18 04:53:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:53:55,667 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1673 transitions. [2022-01-18 04:53:55,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:53:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1673 transitions. [2022-01-18 04:53:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:53:55,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:53:55,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:53:55,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 04:53:55,868 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,SelfDestructingSolverStorable170 [2022-01-18 04:53:55,869 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:53:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:53:55,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1934141749, now seen corresponding path program 163 times [2022-01-18 04:53:55,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:53:55,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140214986] [2022-01-18 04:53:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:53:55,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:53:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:56,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:53:56,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140214986] [2022-01-18 04:53:56,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140214986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:53:56,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843698644] [2022-01-18 04:53:56,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:53:56,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:53:56,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:53:56,045 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) [2022-01-18 04:53:56,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 04:53:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:53:56,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:53:56,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:53:56,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 04:53:56,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:53:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:56,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:53:57,326 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:53:57,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 115 [2022-01-18 04:53:57,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:53:57,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:53:57,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:53:57,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-01-18 04:53:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:53:57,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843698644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:53:57,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:53:57,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:53:57,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167330786] [2022-01-18 04:53:57,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:53:57,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:53:57,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:53:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:53:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:53:57,450 INFO L87 Difference]: Start difference. First operand 580 states and 1673 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:54:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:00,350 INFO L93 Difference]: Finished difference Result 827 states and 2122 transitions. [2022-01-18 04:54:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 04:54:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:00,351 INFO L225 Difference]: With dead ends: 827 [2022-01-18 04:54:00,351 INFO L226 Difference]: Without dead ends: 795 [2022-01-18 04:54:00,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=461, Invalid=2731, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 04:54:00,352 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 261 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:00,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 511 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 04:54:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-18 04:54:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 597. [2022-01-18 04:54:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 2.889261744966443) internal successors, (1722), 596 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1722 transitions. [2022-01-18 04:54:00,358 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1722 transitions. Word has length 18 [2022-01-18 04:54:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:00,359 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1722 transitions. [2022-01-18 04:54:00,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:54:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1722 transitions. [2022-01-18 04:54:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:00,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:00,359 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:00,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 04:54:00,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:00,560 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:00,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1854015021, now seen corresponding path program 164 times [2022-01-18 04:54:00,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:00,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695653339] [2022-01-18 04:54:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:00,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:00,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:00,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695653339] [2022-01-18 04:54:00,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695653339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:00,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655456275] [2022-01-18 04:54:00,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:54:00,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:00,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:00,879 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) [2022-01-18 04:54:00,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 04:54:00,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:54:00,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:00,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:01,297 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 73 treesize of output 61 [2022-01-18 04:54:01,299 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 61 treesize of output 49 [2022-01-18 04:54:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:01,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:01,726 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:54:01,726 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 147 treesize of output 120 [2022-01-18 04:54:01,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:54:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:01,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655456275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:01,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:01,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:54:01,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100552075] [2022-01-18 04:54:01,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:01,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:54:01,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:54:01,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:54:01,864 INFO L87 Difference]: Start difference. First operand 597 states and 1722 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:54:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:02,711 INFO L93 Difference]: Finished difference Result 745 states and 1982 transitions. [2022-01-18 04:54:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:54:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:02,713 INFO L225 Difference]: With dead ends: 745 [2022-01-18 04:54:02,713 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 04:54:02,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:54:02,713 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:02,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 363 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:54:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 04:54:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 603. [2022-01-18 04:54:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.893687707641196) internal successors, (1742), 602 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1742 transitions. [2022-01-18 04:54:02,720 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1742 transitions. Word has length 18 [2022-01-18 04:54:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:02,720 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 1742 transitions. [2022-01-18 04:54:02,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:54:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1742 transitions. [2022-01-18 04:54:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:02,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:02,721 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:02,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 04:54:02,921 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,SelfDestructingSolverStorable172 [2022-01-18 04:54:02,921 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:02,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1820415793, now seen corresponding path program 165 times [2022-01-18 04:54:02,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:02,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936876376] [2022-01-18 04:54:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:02,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:03,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936876376] [2022-01-18 04:54:03,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936876376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384633774] [2022-01-18 04:54:03,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:54:03,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:03,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:03,196 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) [2022-01-18 04:54:03,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 04:54:03,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:54:03,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 04:54:03,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:03,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:54:03,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:54:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:03,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:04,369 INFO L353 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-01-18 04:54:04,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 114 [2022-01-18 04:54:04,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:54:04,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:54:04,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:54:04,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 67 [2022-01-18 04:54:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:04,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384633774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:04,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:04,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:54:04,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773606022] [2022-01-18 04:54:04,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:04,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:54:04,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:54:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:54:04,521 INFO L87 Difference]: Start difference. First operand 603 states and 1742 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:54:07,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:07,769 INFO L93 Difference]: Finished difference Result 897 states and 2260 transitions. [2022-01-18 04:54:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 04:54:07,770 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:07,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:07,771 INFO L225 Difference]: With dead ends: 897 [2022-01-18 04:54:07,771 INFO L226 Difference]: Without dead ends: 865 [2022-01-18 04:54:07,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=528, Invalid=3254, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 04:54:07,771 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 189 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:07,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 411 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:54:07,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-01-18 04:54:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 615. [2022-01-18 04:54:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.907166123778502) internal successors, (1785), 614 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1785 transitions. [2022-01-18 04:54:07,779 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1785 transitions. Word has length 18 [2022-01-18 04:54:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:07,779 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1785 transitions. [2022-01-18 04:54:07,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:54:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1785 transitions. [2022-01-18 04:54:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:07,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:07,780 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:07,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:07,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:07,995 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:07,995 INFO L85 PathProgramCache]: Analyzing trace with hash 258878035, now seen corresponding path program 166 times [2022-01-18 04:54:07,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:07,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627927110] [2022-01-18 04:54:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:07,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:08,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627927110] [2022-01-18 04:54:08,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627927110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059604919] [2022-01-18 04:54:08,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:54:08,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:08,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:08,207 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) [2022-01-18 04:54:08,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 04:54:08,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:54:08,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:08,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:08,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:08,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-01-18 04:54:08,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:54:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:08,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:09,389 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:54:09,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 92 [2022-01-18 04:54:09,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:54:09,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:54:09,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:54:09,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 51 [2022-01-18 04:54:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:09,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059604919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:09,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:09,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-18 04:54:09,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862875944] [2022-01-18 04:54:09,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:09,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 04:54:09,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 04:54:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:54:09,474 INFO L87 Difference]: Start difference. First operand 615 states and 1785 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:11,546 INFO L93 Difference]: Finished difference Result 879 states and 2244 transitions. [2022-01-18 04:54:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 04:54:11,546 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:11,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:11,547 INFO L225 Difference]: With dead ends: 879 [2022-01-18 04:54:11,547 INFO L226 Difference]: Without dead ends: 853 [2022-01-18 04:54:11,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=409, Invalid=2453, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 04:54:11,548 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 208 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:11,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 447 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:54:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-18 04:54:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 619. [2022-01-18 04:54:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.911003236245955) internal successors, (1799), 618 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:11,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1799 transitions. [2022-01-18 04:54:11,556 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1799 transitions. Word has length 18 [2022-01-18 04:54:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:11,556 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1799 transitions. [2022-01-18 04:54:11,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1799 transitions. [2022-01-18 04:54:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:11,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:11,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:11,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-18 04:54:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:11,763 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1913844345, now seen corresponding path program 167 times [2022-01-18 04:54:11,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:11,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342293954] [2022-01-18 04:54:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:11,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:11,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:11,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342293954] [2022-01-18 04:54:11,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342293954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:11,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458227761] [2022-01-18 04:54:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:54:11,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:11,955 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) [2022-01-18 04:54:11,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 04:54:12,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:54:12,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:12,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:12,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:12,345 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 104 treesize of output 88 [2022-01-18 04:54:12,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-01-18 04:54:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:12,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:13,030 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:54:13,031 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 119 treesize of output 102 [2022-01-18 04:54:13,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 04:54:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:54:13,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458227761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:13,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:13,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:54:13,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470052398] [2022-01-18 04:54:13,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:13,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:54:13,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:13,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:54:13,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:54:13,164 INFO L87 Difference]: Start difference. First operand 619 states and 1799 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:54:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:15,030 INFO L93 Difference]: Finished difference Result 821 states and 2127 transitions. [2022-01-18 04:54:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 04:54:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:15,031 INFO L225 Difference]: With dead ends: 821 [2022-01-18 04:54:15,031 INFO L226 Difference]: Without dead ends: 765 [2022-01-18 04:54:15,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=476, Invalid=2604, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 04:54:15,032 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 152 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:15,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 499 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:54:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-18 04:54:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 622. [2022-01-18 04:54:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.9114331723027376) internal successors, (1808), 621 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1808 transitions. [2022-01-18 04:54:15,039 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1808 transitions. Word has length 18 [2022-01-18 04:54:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:15,039 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1808 transitions. [2022-01-18 04:54:15,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:54:15,039 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1808 transitions. [2022-01-18 04:54:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:15,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:15,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:15,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:15,240 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,SelfDestructingSolverStorable175 [2022-01-18 04:54:15,240 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash 232326415, now seen corresponding path program 168 times [2022-01-18 04:54:15,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748432929] [2022-01-18 04:54:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:15,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:15,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:15,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748432929] [2022-01-18 04:54:15,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748432929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:15,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769817366] [2022-01-18 04:54:15,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:54:15,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:15,411 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) [2022-01-18 04:54:15,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 04:54:15,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:54:15,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:15,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:15,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:15,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:54:15,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:54:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:16,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:16,454 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:54:16,454 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 118 treesize of output 101 [2022-01-18 04:54:16,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 04:54:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:54:16,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769817366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:16,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:16,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:54:16,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979904144] [2022-01-18 04:54:16,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:16,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:54:16,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:54:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:54:16,599 INFO L87 Difference]: Start difference. First operand 622 states and 1808 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:54:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:18,492 INFO L93 Difference]: Finished difference Result 843 states and 2158 transitions. [2022-01-18 04:54:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 04:54:18,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:18,493 INFO L225 Difference]: With dead ends: 843 [2022-01-18 04:54:18,493 INFO L226 Difference]: Without dead ends: 783 [2022-01-18 04:54:18,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=476, Invalid=2716, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 04:54:18,493 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 181 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:18,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 441 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:54:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-18 04:54:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 623. [2022-01-18 04:54:18,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 2.9035369774919615) internal successors, (1806), 622 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) [2022-01-18 04:54:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1806 transitions. [2022-01-18 04:54:18,500 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1806 transitions. Word has length 18 [2022-01-18 04:54:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:18,500 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 1806 transitions. [2022-01-18 04:54:18,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:54:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1806 transitions. [2022-01-18 04:54:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:18,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:18,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:18,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-01-18 04:54:18,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:18,701 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:18,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1070058481, now seen corresponding path program 169 times [2022-01-18 04:54:18,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:18,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487627458] [2022-01-18 04:54:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:18,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:18,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:18,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487627458] [2022-01-18 04:54:18,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487627458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:18,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574594448] [2022-01-18 04:54:18,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:54:18,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:18,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:18,912 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) [2022-01-18 04:54:18,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 04:54:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:18,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:19,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 04:54:19,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:54:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:19,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:19,893 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:54:19,893 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 122 treesize of output 103 [2022-01-18 04:54:19,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-01-18 04:54:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:54:20,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574594448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:20,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:20,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:54:20,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141098674] [2022-01-18 04:54:20,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:20,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:54:20,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:54:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:54:20,017 INFO L87 Difference]: Start difference. First operand 623 states and 1806 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:22,010 INFO L93 Difference]: Finished difference Result 841 states and 2172 transitions. [2022-01-18 04:54:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 04:54:22,010 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:22,011 INFO L225 Difference]: With dead ends: 841 [2022-01-18 04:54:22,011 INFO L226 Difference]: Without dead ends: 797 [2022-01-18 04:54:22,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=466, Invalid=2290, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 04:54:22,012 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 275 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:22,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 304 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:54:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-18 04:54:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 630. [2022-01-18 04:54:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 2.9062003179650238) internal successors, (1828), 629 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1828 transitions. [2022-01-18 04:54:22,023 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1828 transitions. Word has length 18 [2022-01-18 04:54:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:22,023 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1828 transitions. [2022-01-18 04:54:22,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1828 transitions. [2022-01-18 04:54:22,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:22,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:22,024 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:22,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:22,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:22,239 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1432857785, now seen corresponding path program 170 times [2022-01-18 04:54:22,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:22,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874425937] [2022-01-18 04:54:22,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:22,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:22,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874425937] [2022-01-18 04:54:22,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874425937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666546888] [2022-01-18 04:54:22,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:54:22,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:22,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:22,494 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) [2022-01-18 04:54:22,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 04:54:22,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:54:22,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:22,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:22,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:22,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:54:22,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:54:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:23,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:23,275 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:54:23,276 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 125 treesize of output 108 [2022-01-18 04:54:23,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-01-18 04:54:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:23,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666546888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:23,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:23,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:54:23,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665038983] [2022-01-18 04:54:23,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:23,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:54:23,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:54:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:54:23,420 INFO L87 Difference]: Start difference. First operand 630 states and 1828 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:54:24,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:24,676 INFO L93 Difference]: Finished difference Result 844 states and 2205 transitions. [2022-01-18 04:54:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:54:24,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:24,678 INFO L225 Difference]: With dead ends: 844 [2022-01-18 04:54:24,678 INFO L226 Difference]: Without dead ends: 801 [2022-01-18 04:54:24,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:54:24,678 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 208 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:24,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 285 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:54:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-18 04:54:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 640. [2022-01-18 04:54:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.9139280125195617) internal successors, (1862), 639 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1862 transitions. [2022-01-18 04:54:24,685 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1862 transitions. Word has length 18 [2022-01-18 04:54:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:24,685 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1862 transitions. [2022-01-18 04:54:24,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:54:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1862 transitions. [2022-01-18 04:54:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:24,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:24,686 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:24,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:24,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-01-18 04:54:24,887 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:24,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1502360493, now seen corresponding path program 171 times [2022-01-18 04:54:24,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:24,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022260992] [2022-01-18 04:54:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:24,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:25,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022260992] [2022-01-18 04:54:25,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022260992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459952951] [2022-01-18 04:54:25,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:54:25,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:25,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:25,101 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) [2022-01-18 04:54:25,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 04:54:25,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:54:25,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:25,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:25,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:25,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:54:25,509 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 85 treesize of output 69 [2022-01-18 04:54:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:25,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:26,090 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:54:26,091 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 108 treesize of output 95 [2022-01-18 04:54:26,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2022-01-18 04:54:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:54:26,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459952951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:26,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:26,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:54:26,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043510063] [2022-01-18 04:54:26,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:26,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:54:26,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:26,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:54:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:54:26,223 INFO L87 Difference]: Start difference. First operand 640 states and 1862 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:54:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:28,150 INFO L93 Difference]: Finished difference Result 877 states and 2261 transitions. [2022-01-18 04:54:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 04:54:28,150 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:28,151 INFO L225 Difference]: With dead ends: 877 [2022-01-18 04:54:28,151 INFO L226 Difference]: Without dead ends: 827 [2022-01-18 04:54:28,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=464, Invalid=2616, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 04:54:28,152 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 227 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:28,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 370 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:54:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-01-18 04:54:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 648. [2022-01-18 04:54:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.918083462132921) internal successors, (1888), 647 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1888 transitions. [2022-01-18 04:54:28,159 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1888 transitions. Word has length 18 [2022-01-18 04:54:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:28,159 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1888 transitions. [2022-01-18 04:54:28,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-01-18 04:54:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1888 transitions. [2022-01-18 04:54:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:28,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:28,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:28,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:28,360 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,SelfDestructingSolverStorable179 [2022-01-18 04:54:28,360 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash 604423627, now seen corresponding path program 172 times [2022-01-18 04:54:28,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:28,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235970612] [2022-01-18 04:54:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:28,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:28,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:28,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235970612] [2022-01-18 04:54:28,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235970612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:28,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319684914] [2022-01-18 04:54:28,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:54:28,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:28,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:28,551 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) [2022-01-18 04:54:28,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 04:54:28,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:54:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:54:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:28,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-01-18 04:54:28,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:54:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:29,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:29,564 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:54:29,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 100 [2022-01-18 04:54:29,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-01-18 04:54:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:54:29,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319684914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:29,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:29,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:54:29,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164688017] [2022-01-18 04:54:29,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:29,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:54:29,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:54:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:54:29,685 INFO L87 Difference]: Start difference. First operand 648 states and 1888 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:54:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:32,476 INFO L93 Difference]: Finished difference Result 914 states and 2337 transitions. [2022-01-18 04:54:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 04:54:32,476 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:32,477 INFO L225 Difference]: With dead ends: 914 [2022-01-18 04:54:32,478 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 04:54:32,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=512, Invalid=3270, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 04:54:32,478 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 261 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:32,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 510 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:54:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 04:54:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 645. [2022-01-18 04:54:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.909937888198758) internal successors, (1874), 644 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1874 transitions. [2022-01-18 04:54:32,486 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1874 transitions. Word has length 18 [2022-01-18 04:54:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:32,486 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1874 transitions. [2022-01-18 04:54:32,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:54:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1874 transitions. [2022-01-18 04:54:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:32,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:32,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:32,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:32,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:32,703 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:32,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1490221907, now seen corresponding path program 173 times [2022-01-18 04:54:32,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:32,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296811591] [2022-01-18 04:54:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:32,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:32,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:32,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296811591] [2022-01-18 04:54:32,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296811591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:32,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052816533] [2022-01-18 04:54:32,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:54:32,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:32,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:32,908 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) [2022-01-18 04:54:32,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 04:54:32,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:54:32,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:32,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:54:32,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:33,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-01-18 04:54:33,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:54:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:33,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:33,981 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:54:33,981 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 119 treesize of output 100 [2022-01-18 04:54:33,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-01-18 04:54:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:34,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052816533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:34,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:34,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:54:34,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279799232] [2022-01-18 04:54:34,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:34,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:54:34,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:34,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:54:34,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:54:34,092 INFO L87 Difference]: Start difference. First operand 645 states and 1874 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:54:37,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:37,067 INFO L93 Difference]: Finished difference Result 916 states and 2344 transitions. [2022-01-18 04:54:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 04:54:37,067 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:37,069 INFO L225 Difference]: With dead ends: 916 [2022-01-18 04:54:37,069 INFO L226 Difference]: Without dead ends: 843 [2022-01-18 04:54:37,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=490, Invalid=3170, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 04:54:37,069 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 253 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:37,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 581 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 04:54:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-18 04:54:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 630. [2022-01-18 04:54:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 2.8950715421303657) internal successors, (1821), 629 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1821 transitions. [2022-01-18 04:54:37,077 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1821 transitions. Word has length 18 [2022-01-18 04:54:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:37,077 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1821 transitions. [2022-01-18 04:54:37,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:54:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1821 transitions. [2022-01-18 04:54:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:37,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:37,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:37,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:37,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:37,278 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:37,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1585268593, now seen corresponding path program 174 times [2022-01-18 04:54:37,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:37,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113250061] [2022-01-18 04:54:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:37,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:37,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:37,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113250061] [2022-01-18 04:54:37,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113250061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:37,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648764216] [2022-01-18 04:54:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:54:37,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:37,533 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) [2022-01-18 04:54:37,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 04:54:37,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:54:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:54:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:37,965 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 91 treesize of output 75 [2022-01-18 04:54:37,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 04:54:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:38,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:38,514 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:54:38,515 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 145 treesize of output 118 [2022-01-18 04:54:38,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 81 [2022-01-18 04:54:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:38,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648764216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:38,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:38,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-18 04:54:38,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473795609] [2022-01-18 04:54:38,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:38,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 04:54:38,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 04:54:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:54:38,636 INFO L87 Difference]: Start difference. First operand 630 states and 1821 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:40,008 INFO L93 Difference]: Finished difference Result 879 states and 2276 transitions. [2022-01-18 04:54:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 04:54:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:40,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:40,009 INFO L225 Difference]: With dead ends: 879 [2022-01-18 04:54:40,009 INFO L226 Difference]: Without dead ends: 858 [2022-01-18 04:54:40,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=320, Invalid=2230, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 04:54:40,010 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 170 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:40,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 450 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:54:40,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-01-18 04:54:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 644. [2022-01-18 04:54:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.9035769828926905) internal successors, (1867), 643 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1867 transitions. [2022-01-18 04:54:40,018 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1867 transitions. Word has length 18 [2022-01-18 04:54:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:40,018 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1867 transitions. [2022-01-18 04:54:40,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1867 transitions. [2022-01-18 04:54:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:40,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:40,019 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:40,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:40,231 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,SelfDestructingSolverStorable182 [2022-01-18 04:54:40,231 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1551669365, now seen corresponding path program 175 times [2022-01-18 04:54:40,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:40,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832321002] [2022-01-18 04:54:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:40,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:40,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:40,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832321002] [2022-01-18 04:54:40,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832321002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:40,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027358622] [2022-01-18 04:54:40,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:54:40,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:40,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:40,535 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) [2022-01-18 04:54:40,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 04:54:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:40,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:40,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:41,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:54:41,044 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 59 treesize of output 47 [2022-01-18 04:54:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:41,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:41,786 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:54:41,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 108 [2022-01-18 04:54:41,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:54:41,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:54:41,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:54:41,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 59 [2022-01-18 04:54:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:41,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027358622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:41,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:41,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-18 04:54:41,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831481886] [2022-01-18 04:54:41,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:41,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 04:54:41,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 04:54:41,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:54:41,870 INFO L87 Difference]: Start difference. First operand 644 states and 1867 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:43,574 INFO L93 Difference]: Finished difference Result 785 states and 2103 transitions. [2022-01-18 04:54:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 04:54:43,574 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:43,575 INFO L225 Difference]: With dead ends: 785 [2022-01-18 04:54:43,575 INFO L226 Difference]: Without dead ends: 754 [2022-01-18 04:54:43,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=400, Invalid=2150, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 04:54:43,576 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 214 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:43,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 340 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:54:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-18 04:54:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 645. [2022-01-18 04:54:43,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.900621118012422) internal successors, (1868), 644 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1868 transitions. [2022-01-18 04:54:43,583 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1868 transitions. Word has length 18 [2022-01-18 04:54:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:43,583 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1868 transitions. [2022-01-18 04:54:43,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1868 transitions. [2022-01-18 04:54:43,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:43,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:43,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:43,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:43,784 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,SelfDestructingSolverStorable183 [2022-01-18 04:54:43,784 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash 527624463, now seen corresponding path program 176 times [2022-01-18 04:54:43,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:43,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139500216] [2022-01-18 04:54:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:43,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:43,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:43,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139500216] [2022-01-18 04:54:43,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139500216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:43,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401853716] [2022-01-18 04:54:43,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:54:43,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:43,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:43,971 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) [2022-01-18 04:54:43,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 04:54:44,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:54:44,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:44,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:44,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:44,398 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 106 treesize of output 90 [2022-01-18 04:54:44,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:54:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:44,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:45,072 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:54:45,073 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 121 treesize of output 102 [2022-01-18 04:54:45,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 73 [2022-01-18 04:54:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:45,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401853716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:45,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:45,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-18 04:54:45,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141339306] [2022-01-18 04:54:45,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:45,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 04:54:45,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 04:54:45,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:54:45,219 INFO L87 Difference]: Start difference. First operand 645 states and 1868 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:46,979 INFO L93 Difference]: Finished difference Result 970 states and 2447 transitions. [2022-01-18 04:54:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 04:54:46,979 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:46,980 INFO L225 Difference]: With dead ends: 970 [2022-01-18 04:54:46,980 INFO L226 Difference]: Without dead ends: 930 [2022-01-18 04:54:46,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=419, Invalid=2551, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 04:54:46,981 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 198 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:46,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 568 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:54:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-18 04:54:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 644. [2022-01-18 04:54:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.895800933125972) internal successors, (1862), 643 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1862 transitions. [2022-01-18 04:54:46,989 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1862 transitions. Word has length 18 [2022-01-18 04:54:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:46,989 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1862 transitions. [2022-01-18 04:54:46,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:46,989 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1862 transitions. [2022-01-18 04:54:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:46,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:46,990 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:47,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 04:54:47,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:47,190 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:47,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash 555114755, now seen corresponding path program 177 times [2022-01-18 04:54:47,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:47,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513447170] [2022-01-18 04:54:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:47,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:47,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:47,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513447170] [2022-01-18 04:54:47,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513447170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:47,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323700531] [2022-01-18 04:54:47,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:54:47,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:47,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:47,423 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) [2022-01-18 04:54:47,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 04:54:47,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:54:47,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:47,838 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 71 treesize of output 59 [2022-01-18 04:54:47,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:54:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:47,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:48,248 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:54:48,248 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 121 treesize of output 104 [2022-01-18 04:54:48,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 04:54:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:54:48,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323700531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:48,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:48,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-01-18 04:54:48,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104515198] [2022-01-18 04:54:48,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:48,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:54:48,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:54:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:54:48,390 INFO L87 Difference]: Start difference. First operand 644 states and 1862 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:54:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:49,631 INFO L93 Difference]: Finished difference Result 823 states and 2174 transitions. [2022-01-18 04:54:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:54:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:49,633 INFO L225 Difference]: With dead ends: 823 [2022-01-18 04:54:49,633 INFO L226 Difference]: Without dead ends: 791 [2022-01-18 04:54:49,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=2054, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 04:54:49,633 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 155 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:49,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 381 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:54:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-18 04:54:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 644. [2022-01-18 04:54:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.894245723172628) internal successors, (1861), 643 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1861 transitions. [2022-01-18 04:54:49,647 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1861 transitions. Word has length 18 [2022-01-18 04:54:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:49,647 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1861 transitions. [2022-01-18 04:54:49,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:54:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1861 transitions. [2022-01-18 04:54:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:49,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:49,648 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:49,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:49,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:49,848 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:49,849 INFO L85 PathProgramCache]: Analyzing trace with hash 485612047, now seen corresponding path program 178 times [2022-01-18 04:54:49,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:49,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615907506] [2022-01-18 04:54:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:49,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:50,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615907506] [2022-01-18 04:54:50,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615907506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758786285] [2022-01-18 04:54:50,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:54:50,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:50,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:50,016 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) [2022-01-18 04:54:50,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 04:54:50,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:54:50,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:50,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:50,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:50,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 04:54:50,465 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 77 treesize of output 61 [2022-01-18 04:54:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:50,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:51,273 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 04:54:51,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 115 [2022-01-18 04:54:51,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:54:51,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:54:51,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:54:51,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-01-18 04:54:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:51,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758786285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:51,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:51,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-18 04:54:51,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335000020] [2022-01-18 04:54:51,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:51,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 04:54:51,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:51,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 04:54:51,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:54:51,359 INFO L87 Difference]: Start difference. First operand 644 states and 1861 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:53,726 INFO L93 Difference]: Finished difference Result 911 states and 2343 transitions. [2022-01-18 04:54:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 04:54:53,727 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:53,728 INFO L225 Difference]: With dead ends: 911 [2022-01-18 04:54:53,728 INFO L226 Difference]: Without dead ends: 875 [2022-01-18 04:54:53,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=355, Invalid=2401, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 04:54:53,728 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 195 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:53,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 400 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:54:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-01-18 04:54:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 658. [2022-01-18 04:54:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.9056316590563167) internal successors, (1909), 657 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1909 transitions. [2022-01-18 04:54:53,736 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1909 transitions. Word has length 18 [2022-01-18 04:54:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:53,736 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1909 transitions. [2022-01-18 04:54:53,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-01-18 04:54:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1909 transitions. [2022-01-18 04:54:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:53,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:53,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:53,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-01-18 04:54:53,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:53,937 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:53,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:53,938 INFO L85 PathProgramCache]: Analyzing trace with hash -759299637, now seen corresponding path program 179 times [2022-01-18 04:54:53,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:53,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19584598] [2022-01-18 04:54:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:53,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:54,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19584598] [2022-01-18 04:54:54,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19584598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764636679] [2022-01-18 04:54:54,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:54:54,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:54,151 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) [2022-01-18 04:54:54,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 04:54:54,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:54:54,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:54,504 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 99 treesize of output 83 [2022-01-18 04:54:54,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:54:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:54,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:55,102 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:54:55,103 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 106 treesize of output 93 [2022-01-18 04:54:55,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:54:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:54:55,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764636679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:55,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:55,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-01-18 04:54:55,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713359807] [2022-01-18 04:54:55,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:55,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:54:55,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:55,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:54:55,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:54:55,243 INFO L87 Difference]: Start difference. First operand 658 states and 1909 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:55,869 INFO L93 Difference]: Finished difference Result 786 states and 2130 transitions. [2022-01-18 04:54:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:54:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:55,870 INFO L225 Difference]: With dead ends: 786 [2022-01-18 04:54:55,870 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 04:54:55,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:54:55,871 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 99 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:55,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 228 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:54:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 04:54:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 661. [2022-01-18 04:54:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.9045454545454548) internal successors, (1917), 660 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1917 transitions. [2022-01-18 04:54:55,878 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1917 transitions. Word has length 18 [2022-01-18 04:54:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:55,878 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1917 transitions. [2022-01-18 04:54:55,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1917 transitions. [2022-01-18 04:54:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:55,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:55,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:55,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-18 04:54:56,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:56,095 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:56,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1386871123, now seen corresponding path program 180 times [2022-01-18 04:54:56,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:56,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977727812] [2022-01-18 04:54:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:56,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:56,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977727812] [2022-01-18 04:54:56,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977727812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963753223] [2022-01-18 04:54:56,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:54:56,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:56,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:56,282 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) [2022-01-18 04:54:56,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 04:54:56,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:54:56,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:54:56,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:54:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:56,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:54:56,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:54:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:56,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:57,218 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:54:57,219 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 106 treesize of output 93 [2022-01-18 04:54:57,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 04:54:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:54:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963753223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:57,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:57,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2022-01-18 04:54:57,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023771258] [2022-01-18 04:54:57,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:57,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:54:57,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:54:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:54:57,349 INFO L87 Difference]: Start difference. First operand 661 states and 1917 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:58,767 INFO L93 Difference]: Finished difference Result 828 states and 2191 transitions. [2022-01-18 04:54:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:54:58,767 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:58,769 INFO L225 Difference]: With dead ends: 828 [2022-01-18 04:54:58,769 INFO L226 Difference]: Without dead ends: 792 [2022-01-18 04:54:58,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=380, Invalid=2170, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 04:54:58,769 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 206 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:58,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 292 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:54:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-18 04:54:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 661. [2022-01-18 04:54:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.8984848484848484) internal successors, (1913), 660 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1913 transitions. [2022-01-18 04:54:58,777 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1913 transitions. Word has length 18 [2022-01-18 04:54:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:58,777 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1913 transitions. [2022-01-18 04:54:58,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1913 transitions. [2022-01-18 04:54:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:58,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:58,778 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:54:58,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-01-18 04:54:58,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 04:54:58,994 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:54:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:54:58,994 INFO L85 PathProgramCache]: Analyzing trace with hash 11293587, now seen corresponding path program 181 times [2022-01-18 04:54:58,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:54:58,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455633707] [2022-01-18 04:54:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:54:58,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:54:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:59,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:54:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455633707] [2022-01-18 04:54:59,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455633707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:54:59,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695884565] [2022-01-18 04:54:59,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:54:59,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:54:59,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:54:59,104 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) [2022-01-18 04:54:59,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 04:54:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:54:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:54:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:54:59,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-01-18 04:54:59,370 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 73 treesize of output 57 [2022-01-18 04:54:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:59,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:54:59,601 INFO L353 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2022-01-18 04:54:59,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 50 [2022-01-18 04:54:59,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:54:59,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:54:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:54:59,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695884565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:54:59,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:54:59,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:54:59,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096927555] [2022-01-18 04:54:59,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:54:59,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:54:59,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:54:59,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:54:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:54:59,667 INFO L87 Difference]: Start difference. First operand 661 states and 1913 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:54:59,984 INFO L93 Difference]: Finished difference Result 729 states and 2051 transitions. [2022-01-18 04:54:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:54:59,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:54:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:54:59,985 INFO L225 Difference]: With dead ends: 729 [2022-01-18 04:54:59,985 INFO L226 Difference]: Without dead ends: 729 [2022-01-18 04:54:59,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:54:59,985 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:54:59,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 91 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:54:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-01-18 04:54:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 661. [2022-01-18 04:54:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.8954545454545455) internal successors, (1911), 660 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1911 transitions. [2022-01-18 04:54:59,993 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1911 transitions. Word has length 18 [2022-01-18 04:54:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:54:59,993 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1911 transitions. [2022-01-18 04:54:59,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:54:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1911 transitions. [2022-01-18 04:54:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:54:59,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:54:59,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:00,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-01-18 04:55:00,194 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,SelfDestructingSolverStorable189 [2022-01-18 04:55:00,194 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash -816772849, now seen corresponding path program 182 times [2022-01-18 04:55:00,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:00,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546245513] [2022-01-18 04:55:00,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:00,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:00,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:00,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546245513] [2022-01-18 04:55:00,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546245513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:00,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948783000] [2022-01-18 04:55:00,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:55:00,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:00,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:00,392 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) [2022-01-18 04:55:00,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 04:55:00,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:55:00,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:00,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:55:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:00,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:55:00,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:55:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:01,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:01,494 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:55:01,494 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 100 [2022-01-18 04:55:01,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-01-18 04:55:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:01,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948783000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:01,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:01,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-01-18 04:55:01,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761438559] [2022-01-18 04:55:01,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:01,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:01,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:01,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:01,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:01,610 INFO L87 Difference]: Start difference. First operand 661 states and 1911 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:03,329 INFO L93 Difference]: Finished difference Result 919 states and 2374 transitions. [2022-01-18 04:55:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:55:03,330 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:03,331 INFO L225 Difference]: With dead ends: 919 [2022-01-18 04:55:03,331 INFO L226 Difference]: Without dead ends: 866 [2022-01-18 04:55:03,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 04:55:03,331 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 331 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:03,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 316 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:55:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-01-18 04:55:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 658. [2022-01-18 04:55:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.888888888888889) internal successors, (1898), 657 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1898 transitions. [2022-01-18 04:55:03,339 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1898 transitions. Word has length 18 [2022-01-18 04:55:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:03,339 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1898 transitions. [2022-01-18 04:55:03,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1898 transitions. [2022-01-18 04:55:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:03,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:03,340 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:03,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:03,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:03,546 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1164111357, now seen corresponding path program 183 times [2022-01-18 04:55:03,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:03,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625120995] [2022-01-18 04:55:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:03,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:03,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625120995] [2022-01-18 04:55:03,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625120995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759696081] [2022-01-18 04:55:03,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:55:03,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:03,827 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) [2022-01-18 04:55:03,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 04:55:03,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:55:03,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:03,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 04:55:03,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:04,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:55:04,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 04:55:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:04,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:04,970 INFO L353 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-01-18 04:55:04,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 102 [2022-01-18 04:55:04,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:55:04,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:04,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 65 [2022-01-18 04:55:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:05,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759696081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:05,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:05,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:55:05,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780979105] [2022-01-18 04:55:05,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:05,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:55:05,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:55:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:55:05,137 INFO L87 Difference]: Start difference. First operand 658 states and 1898 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:55:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:08,152 INFO L93 Difference]: Finished difference Result 955 states and 2412 transitions. [2022-01-18 04:55:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 04:55:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:08,154 INFO L225 Difference]: With dead ends: 955 [2022-01-18 04:55:08,154 INFO L226 Difference]: Without dead ends: 903 [2022-01-18 04:55:08,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=760, Invalid=3796, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 04:55:08,155 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 289 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:08,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 388 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:55:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-01-18 04:55:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 669. [2022-01-18 04:55:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.8997005988023954) internal successors, (1937), 668 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1937 transitions. [2022-01-18 04:55:08,163 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1937 transitions. Word has length 18 [2022-01-18 04:55:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:08,163 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1937 transitions. [2022-01-18 04:55:08,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:55:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1937 transitions. [2022-01-18 04:55:08,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:08,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:08,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:08,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:08,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:08,365 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1233614065, now seen corresponding path program 184 times [2022-01-18 04:55:08,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:08,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495277413] [2022-01-18 04:55:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:08,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:08,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:08,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495277413] [2022-01-18 04:55:08,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495277413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:08,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843741174] [2022-01-18 04:55:08,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:55:08,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:08,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:08,529 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) [2022-01-18 04:55:08,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 04:55:08,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:55:08,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:08,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:55:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:08,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:55:08,880 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 85 treesize of output 69 [2022-01-18 04:55:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:09,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:09,467 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:09,467 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 104 treesize of output 91 [2022-01-18 04:55:09,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-01-18 04:55:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:09,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843741174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:09,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:09,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 04:55:09,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062545478] [2022-01-18 04:55:09,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:09,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:55:09,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:55:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:55:09,615 INFO L87 Difference]: Start difference. First operand 669 states and 1937 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:55:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:11,458 INFO L93 Difference]: Finished difference Result 947 states and 2467 transitions. [2022-01-18 04:55:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 04:55:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:11,460 INFO L225 Difference]: With dead ends: 947 [2022-01-18 04:55:11,460 INFO L226 Difference]: Without dead ends: 897 [2022-01-18 04:55:11,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=439, Invalid=2753, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 04:55:11,461 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 210 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:11,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 463 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:55:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-18 04:55:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 684. [2022-01-18 04:55:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.9092240117130306) internal successors, (1987), 683 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1987 transitions. [2022-01-18 04:55:11,469 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1987 transitions. Word has length 18 [2022-01-18 04:55:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:11,469 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1987 transitions. [2022-01-18 04:55:11,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:55:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1987 transitions. [2022-01-18 04:55:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:11,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:11,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:11,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:11,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:11,677 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:11,677 INFO L85 PathProgramCache]: Analyzing trace with hash 873170055, now seen corresponding path program 185 times [2022-01-18 04:55:11,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:11,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107855724] [2022-01-18 04:55:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:11,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:11,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:11,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107855724] [2022-01-18 04:55:11,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107855724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:11,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533636806] [2022-01-18 04:55:11,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:55:11,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:11,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:11,876 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) [2022-01-18 04:55:11,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 04:55:11,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:55:11,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:11,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:55:11,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:12,251 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 99 treesize of output 83 [2022-01-18 04:55:12,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:55:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:12,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:12,799 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:55:12,799 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 115 treesize of output 96 [2022-01-18 04:55:12,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 67 [2022-01-18 04:55:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:55:12,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533636806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:12,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:12,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-01-18 04:55:12,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973872979] [2022-01-18 04:55:12,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:12,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:12,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:12,920 INFO L87 Difference]: Start difference. First operand 684 states and 1987 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:14,476 INFO L93 Difference]: Finished difference Result 867 states and 2297 transitions. [2022-01-18 04:55:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:55:14,476 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:14,478 INFO L225 Difference]: With dead ends: 867 [2022-01-18 04:55:14,478 INFO L226 Difference]: Without dead ends: 804 [2022-01-18 04:55:14,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 04:55:14,478 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 303 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:14,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 261 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:55:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-18 04:55:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 688. [2022-01-18 04:55:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 2.908296943231441) internal successors, (1998), 687 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1998 transitions. [2022-01-18 04:55:14,486 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1998 transitions. Word has length 18 [2022-01-18 04:55:14,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:14,486 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 1998 transitions. [2022-01-18 04:55:14,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:14,486 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1998 transitions. [2022-01-18 04:55:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:14,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:14,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:14,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:14,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:14,687 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:14,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1758968335, now seen corresponding path program 186 times [2022-01-18 04:55:14,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:14,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230025795] [2022-01-18 04:55:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:14,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:14,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230025795] [2022-01-18 04:55:14,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230025795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675908383] [2022-01-18 04:55:14,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:55:14,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:14,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:14,902 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) [2022-01-18 04:55:14,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 04:55:14,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:55:14,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:14,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:55:14,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:15,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:55:15,337 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 85 treesize of output 69 [2022-01-18 04:55:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:15,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:15,988 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:55:15,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-01-18 04:55:15,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 67 [2022-01-18 04:55:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:16,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675908383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:16,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:16,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:55:16,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499129358] [2022-01-18 04:55:16,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:16,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:55:16,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:55:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:55:16,128 INFO L87 Difference]: Start difference. First operand 688 states and 1998 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:55:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:18,383 INFO L93 Difference]: Finished difference Result 947 states and 2448 transitions. [2022-01-18 04:55:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:55:18,383 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:18,384 INFO L225 Difference]: With dead ends: 947 [2022-01-18 04:55:18,384 INFO L226 Difference]: Without dead ends: 874 [2022-01-18 04:55:18,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=463, Invalid=2843, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 04:55:18,385 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 282 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:18,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 419 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:55:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-01-18 04:55:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 699. [2022-01-18 04:55:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.9011461318051577) internal successors, (2025), 698 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2025 transitions. [2022-01-18 04:55:18,392 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2025 transitions. Word has length 18 [2022-01-18 04:55:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:18,393 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2025 transitions. [2022-01-18 04:55:18,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:55:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2025 transitions. [2022-01-18 04:55:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:18,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:18,393 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:18,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:18,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:18,594 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash -739800121, now seen corresponding path program 187 times [2022-01-18 04:55:18,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:18,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225536706] [2022-01-18 04:55:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:18,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:18,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:18,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225536706] [2022-01-18 04:55:18,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225536706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:18,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703175111] [2022-01-18 04:55:18,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:55:18,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:18,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:18,908 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) [2022-01-18 04:55:18,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 04:55:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:18,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:55:18,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:19,310 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 71 treesize of output 59 [2022-01-18 04:55:19,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:55:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:19,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:19,681 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:19,681 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 125 treesize of output 108 [2022-01-18 04:55:19,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-01-18 04:55:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:19,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703175111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:19,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:19,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-01-18 04:55:19,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124288780] [2022-01-18 04:55:19,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:19,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:19,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:19,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:19,832 INFO L87 Difference]: Start difference. First operand 699 states and 2025 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:21,154 INFO L93 Difference]: Finished difference Result 957 states and 2531 transitions. [2022-01-18 04:55:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:55:21,154 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:21,155 INFO L225 Difference]: With dead ends: 957 [2022-01-18 04:55:21,155 INFO L226 Difference]: Without dead ends: 932 [2022-01-18 04:55:21,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 04:55:21,156 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 264 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:21,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 377 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:55:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-01-18 04:55:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 703. [2022-01-18 04:55:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.903133903133903) internal successors, (2038), 702 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2038 transitions. [2022-01-18 04:55:21,164 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2038 transitions. Word has length 18 [2022-01-18 04:55:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:21,164 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2038 transitions. [2022-01-18 04:55:21,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2038 transitions. [2022-01-18 04:55:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:21,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:21,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:21,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 04:55:21,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:21,365 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:21,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1339493707, now seen corresponding path program 188 times [2022-01-18 04:55:21,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:21,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570088786] [2022-01-18 04:55:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:21,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:21,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570088786] [2022-01-18 04:55:21,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570088786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549297663] [2022-01-18 04:55:21,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:55:21,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:21,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:21,529 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) [2022-01-18 04:55:21,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 04:55:21,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:55:21,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:21,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:55:21,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:21,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:55:21,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:55:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:22,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:22,516 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:22,517 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 105 treesize of output 92 [2022-01-18 04:55:22,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:55:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:22,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549297663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:22,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:22,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-01-18 04:55:22,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432776676] [2022-01-18 04:55:22,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:22,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:22,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:22,663 INFO L87 Difference]: Start difference. First operand 703 states and 2038 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:24,092 INFO L93 Difference]: Finished difference Result 994 states and 2584 transitions. [2022-01-18 04:55:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:55:24,092 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:24,094 INFO L225 Difference]: With dead ends: 994 [2022-01-18 04:55:24,094 INFO L226 Difference]: Without dead ends: 945 [2022-01-18 04:55:24,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=389, Invalid=2061, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 04:55:24,094 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 278 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:24,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 467 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:55:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-01-18 04:55:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 718. [2022-01-18 04:55:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.916317991631799) internal successors, (2091), 717 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2091 transitions. [2022-01-18 04:55:24,102 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2091 transitions. Word has length 18 [2022-01-18 04:55:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:24,102 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 2091 transitions. [2022-01-18 04:55:24,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2091 transitions. [2022-01-18 04:55:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:24,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:24,103 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:24,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:24,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:24,319 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash -809302829, now seen corresponding path program 189 times [2022-01-18 04:55:24,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:24,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670042488] [2022-01-18 04:55:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:24,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:24,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670042488] [2022-01-18 04:55:24,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670042488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:24,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389690613] [2022-01-18 04:55:24,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:55:24,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:24,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:24,490 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) [2022-01-18 04:55:24,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 04:55:24,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:55:24,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:24,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:55:24,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:24,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 04:55:24,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:55:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:25,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:25,654 INFO L353 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-01-18 04:55:25,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 81 [2022-01-18 04:55:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:55:25,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:25,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 48 [2022-01-18 04:55:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:25,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389690613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:25,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:25,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-01-18 04:55:25,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012033010] [2022-01-18 04:55:25,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:25,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:55:25,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:55:25,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:55:25,739 INFO L87 Difference]: Start difference. First operand 718 states and 2091 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:55:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:27,569 INFO L93 Difference]: Finished difference Result 964 states and 2540 transitions. [2022-01-18 04:55:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 04:55:27,570 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:27,571 INFO L225 Difference]: With dead ends: 964 [2022-01-18 04:55:27,571 INFO L226 Difference]: Without dead ends: 928 [2022-01-18 04:55:27,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=345, Invalid=2517, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 04:55:27,572 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 285 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:27,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 360 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:55:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-18 04:55:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 731. [2022-01-18 04:55:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 2.926027397260274) internal successors, (2136), 730 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2136 transitions. [2022-01-18 04:55:27,580 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2136 transitions. Word has length 18 [2022-01-18 04:55:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:27,580 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 2136 transitions. [2022-01-18 04:55:27,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:55:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2136 transitions. [2022-01-18 04:55:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:27,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:27,581 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:27,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:27,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:27,782 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:27,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1297481291, now seen corresponding path program 190 times [2022-01-18 04:55:27,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:27,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005282755] [2022-01-18 04:55:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:27,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:27,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:27,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005282755] [2022-01-18 04:55:27,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005282755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:27,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896993034] [2022-01-18 04:55:27,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:55:27,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:27,946 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) [2022-01-18 04:55:27,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 04:55:28,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:55:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 04:55:28,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:28,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 04:55:28,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:55:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:28,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:29,010 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:55:29,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 100 [2022-01-18 04:55:29,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-01-18 04:55:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:29,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896993034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:29,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:29,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-01-18 04:55:29,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013623921] [2022-01-18 04:55:29,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:29,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:29,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:29,128 INFO L87 Difference]: Start difference. First operand 731 states and 2136 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:31,234 INFO L93 Difference]: Finished difference Result 1011 states and 2642 transitions. [2022-01-18 04:55:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 04:55:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:31,235 INFO L225 Difference]: With dead ends: 1011 [2022-01-18 04:55:31,235 INFO L226 Difference]: Without dead ends: 951 [2022-01-18 04:55:31,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=417, Invalid=2553, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 04:55:31,236 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 343 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:31,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 369 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:55:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-18 04:55:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 732. [2022-01-18 04:55:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.926128590971272) internal successors, (2139), 731 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2139 transitions. [2022-01-18 04:55:31,244 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2139 transitions. Word has length 18 [2022-01-18 04:55:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:31,244 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2139 transitions. [2022-01-18 04:55:31,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2139 transitions. [2022-01-18 04:55:31,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:31,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:31,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:31,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 04:55:31,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:31,445 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2111687725, now seen corresponding path program 191 times [2022-01-18 04:55:31,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:31,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414202906] [2022-01-18 04:55:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:31,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:31,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:31,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414202906] [2022-01-18 04:55:31,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414202906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:31,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045802866] [2022-01-18 04:55:31,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:55:31,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:31,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:31,627 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) [2022-01-18 04:55:31,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 04:55:31,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:55:31,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 04:55:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:32,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-01-18 04:55:32,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-01-18 04:55:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:32,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:32,634 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:55:32,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-01-18 04:55:32,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-01-18 04:55:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:32,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045802866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:32,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:32,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:55:32,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109221742] [2022-01-18 04:55:32,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:32,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:55:32,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:32,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:55:32,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:55:32,750 INFO L87 Difference]: Start difference. First operand 732 states and 2139 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:55:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:34,665 INFO L93 Difference]: Finished difference Result 930 states and 2498 transitions. [2022-01-18 04:55:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:55:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:34,666 INFO L225 Difference]: With dead ends: 930 [2022-01-18 04:55:34,666 INFO L226 Difference]: Without dead ends: 882 [2022-01-18 04:55:34,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=332, Invalid=2530, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 04:55:34,667 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 274 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:34,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 448 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:55:34,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-01-18 04:55:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 735. [2022-01-18 04:55:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.923705722070845) internal successors, (2146), 734 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2146 transitions. [2022-01-18 04:55:34,675 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2146 transitions. Word has length 18 [2022-01-18 04:55:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:34,675 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2146 transitions. [2022-01-18 04:55:34,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:55:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2146 transitions. [2022-01-18 04:55:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:55:34,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:34,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:34,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:34,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:34,877 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1266716273, now seen corresponding path program 192 times [2022-01-18 04:55:34,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:34,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200411749] [2022-01-18 04:55:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:34,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:35,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200411749] [2022-01-18 04:55:35,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200411749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281665467] [2022-01-18 04:55:35,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:55:35,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:35,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:35,135 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) [2022-01-18 04:55:35,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 04:55:35,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:55:35,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:35,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 04:55:35,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:35,550 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 93 treesize of output 77 [2022-01-18 04:55:35,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 04:55:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:35,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:36,247 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:36,248 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 81 treesize of output 72 [2022-01-18 04:55:36,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-01-18 04:55:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:36,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281665467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:36,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:36,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 04:55:36,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928055942] [2022-01-18 04:55:36,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:36,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:55:36,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:36,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:55:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:55:36,295 INFO L87 Difference]: Start difference. First operand 735 states and 2146 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:55:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:38,588 INFO L93 Difference]: Finished difference Result 992 states and 2725 transitions. [2022-01-18 04:55:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:55:38,588 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 04:55:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:38,590 INFO L225 Difference]: With dead ends: 992 [2022-01-18 04:55:38,590 INFO L226 Difference]: Without dead ends: 939 [2022-01-18 04:55:38,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=393, Invalid=2577, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 04:55:38,590 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:38,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 426 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:55:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-01-18 04:55:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 737. [2022-01-18 04:55:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.921195652173913) internal successors, (2150), 736 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2150 transitions. [2022-01-18 04:55:38,600 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2150 transitions. Word has length 18 [2022-01-18 04:55:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:38,600 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2150 transitions. [2022-01-18 04:55:38,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-01-18 04:55:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2150 transitions. [2022-01-18 04:55:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:38,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:38,601 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:38,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:38,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 04:55:38,802 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:38,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1332907849, now seen corresponding path program 193 times [2022-01-18 04:55:38,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:38,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376062135] [2022-01-18 04:55:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:38,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:38,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376062135] [2022-01-18 04:55:38,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376062135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142159735] [2022-01-18 04:55:38,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:55:38,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:38,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:38,907 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) [2022-01-18 04:55:38,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 04:55:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:39,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:39,317 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:39,318 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 30 treesize of output 25 [2022-01-18 04:55:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:39,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142159735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:39,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:39,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-18 04:55:39,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140650419] [2022-01-18 04:55:39,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:39,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:55:39,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:55:39,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:55:39,339 INFO L87 Difference]: Start difference. First operand 737 states and 2150 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:39,558 INFO L93 Difference]: Finished difference Result 852 states and 2432 transitions. [2022-01-18 04:55:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:55:39,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:39,559 INFO L225 Difference]: With dead ends: 852 [2022-01-18 04:55:39,559 INFO L226 Difference]: Without dead ends: 852 [2022-01-18 04:55:39,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:55:39,559 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:39,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 205 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-01-18 04:55:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 739. [2022-01-18 04:55:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.921409214092141) internal successors, (2156), 738 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2156 transitions. [2022-01-18 04:55:39,567 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2156 transitions. Word has length 19 [2022-01-18 04:55:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:39,567 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2156 transitions. [2022-01-18 04:55:39,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2156 transitions. [2022-01-18 04:55:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:39,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:39,568 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:39,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 04:55:39,768 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,SelfDestructingSolverStorable201 [2022-01-18 04:55:39,769 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:39,769 INFO L85 PathProgramCache]: Analyzing trace with hash -478490133, now seen corresponding path program 194 times [2022-01-18 04:55:39,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:39,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292488110] [2022-01-18 04:55:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:39,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:39,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292488110] [2022-01-18 04:55:39,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292488110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114952054] [2022-01-18 04:55:39,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:55:39,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:39,883 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) [2022-01-18 04:55:39,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 04:55:39,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:55:39,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:39,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:39,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:40,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:40,410 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:40,410 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 30 treesize of output 25 [2022-01-18 04:55:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:40,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114952054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:40,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:40,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:55:40,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718906541] [2022-01-18 04:55:40,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:40,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:40,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:40,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:40,449 INFO L87 Difference]: Start difference. First operand 739 states and 2156 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:40,995 INFO L93 Difference]: Finished difference Result 860 states and 2450 transitions. [2022-01-18 04:55:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:55:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:40,996 INFO L225 Difference]: With dead ends: 860 [2022-01-18 04:55:40,996 INFO L226 Difference]: Without dead ends: 860 [2022-01-18 04:55:40,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:55:40,997 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:40,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 202 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-01-18 04:55:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 739. [2022-01-18 04:55:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.921409214092141) internal successors, (2156), 738 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2156 transitions. [2022-01-18 04:55:41,005 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2156 transitions. Word has length 19 [2022-01-18 04:55:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:41,005 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2156 transitions. [2022-01-18 04:55:41,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2156 transitions. [2022-01-18 04:55:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:41,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:41,006 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:41,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-18 04:55:41,206 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,SelfDestructingSolverStorable202 [2022-01-18 04:55:41,206 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:41,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2036397077, now seen corresponding path program 195 times [2022-01-18 04:55:41,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:41,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346026276] [2022-01-18 04:55:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:41,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:41,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:41,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346026276] [2022-01-18 04:55:41,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346026276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982882056] [2022-01-18 04:55:41,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:55:41,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:41,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:41,319 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) [2022-01-18 04:55:41,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 04:55:41,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:55:41,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:41,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:41,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:41,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2022-01-18 04:55:41,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-01-18 04:55:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:41,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:41,859 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:41,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-01-18 04:55:41,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 04:55:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:41,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982882056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:41,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:41,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 04:55:41,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088241800] [2022-01-18 04:55:41,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:41,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:55:41,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:55:41,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:55:41,919 INFO L87 Difference]: Start difference. First operand 739 states and 2156 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:42,457 INFO L93 Difference]: Finished difference Result 833 states and 2391 transitions. [2022-01-18 04:55:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:55:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:42,459 INFO L225 Difference]: With dead ends: 833 [2022-01-18 04:55:42,459 INFO L226 Difference]: Without dead ends: 827 [2022-01-18 04:55:42,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 04:55:42,459 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:42,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 164 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-01-18 04:55:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 739. [2022-01-18 04:55:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.9200542005420056) internal successors, (2155), 738 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2155 transitions. [2022-01-18 04:55:42,467 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2155 transitions. Word has length 19 [2022-01-18 04:55:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:42,467 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2155 transitions. [2022-01-18 04:55:42,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2155 transitions. [2022-01-18 04:55:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:42,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:42,468 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:42,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-18 04:55:42,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:42,668 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash 407308147, now seen corresponding path program 196 times [2022-01-18 04:55:42,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:42,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695436394] [2022-01-18 04:55:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:42,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:42,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:42,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695436394] [2022-01-18 04:55:42,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695436394] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:42,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081597230] [2022-01-18 04:55:42,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:55:42,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:42,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:42,792 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) [2022-01-18 04:55:42,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 04:55:42,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:55:42,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:42,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:43,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:43,385 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:43,386 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 31 treesize of output 26 [2022-01-18 04:55:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:43,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081597230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:43,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:43,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:55:43,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174071421] [2022-01-18 04:55:43,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:43,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:43,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:43,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:43,425 INFO L87 Difference]: Start difference. First operand 739 states and 2155 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:44,053 INFO L93 Difference]: Finished difference Result 864 states and 2461 transitions. [2022-01-18 04:55:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:55:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:44,055 INFO L225 Difference]: With dead ends: 864 [2022-01-18 04:55:44,055 INFO L226 Difference]: Without dead ends: 864 [2022-01-18 04:55:44,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 04:55:44,055 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:44,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 189 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-18 04:55:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 739. [2022-01-18 04:55:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.9200542005420056) internal successors, (2155), 738 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2155 transitions. [2022-01-18 04:55:44,063 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2155 transitions. Word has length 19 [2022-01-18 04:55:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:44,063 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2155 transitions. [2022-01-18 04:55:44,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2155 transitions. [2022-01-18 04:55:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:44,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:44,064 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:44,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:44,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:44,265 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:44,265 INFO L85 PathProgramCache]: Analyzing trace with hash -994821009, now seen corresponding path program 197 times [2022-01-18 04:55:44,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:44,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483803618] [2022-01-18 04:55:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:44,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:44,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:44,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483803618] [2022-01-18 04:55:44,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483803618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:44,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75033150] [2022-01-18 04:55:44,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:55:44,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:44,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:44,384 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) [2022-01-18 04:55:44,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 04:55:44,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:55:44,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:44,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2022-01-18 04:55:44,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-01-18 04:55:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:44,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:44,972 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:44,973 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 65 treesize of output 56 [2022-01-18 04:55:44,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 04:55:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:45,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75033150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:45,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:45,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 04:55:45,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907616580] [2022-01-18 04:55:45,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:45,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 04:55:45,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 04:55:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:55:45,035 INFO L87 Difference]: Start difference. First operand 739 states and 2155 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:45,803 INFO L93 Difference]: Finished difference Result 863 states and 2439 transitions. [2022-01-18 04:55:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:55:45,804 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:45,805 INFO L225 Difference]: With dead ends: 863 [2022-01-18 04:55:45,805 INFO L226 Difference]: Without dead ends: 859 [2022-01-18 04:55:45,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:55:45,805 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 207 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:45,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 181 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-18 04:55:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 745. [2022-01-18 04:55:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.9166666666666665) internal successors, (2170), 744 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2170 transitions. [2022-01-18 04:55:45,813 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2170 transitions. Word has length 19 [2022-01-18 04:55:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:45,813 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2170 transitions. [2022-01-18 04:55:45,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2170 transitions. [2022-01-18 04:55:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:45,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:45,814 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:45,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 04:55:46,014 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,SelfDestructingSolverStorable205 [2022-01-18 04:55:46,014 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1747275801, now seen corresponding path program 198 times [2022-01-18 04:55:46,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:46,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130443161] [2022-01-18 04:55:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:46,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:46,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:46,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130443161] [2022-01-18 04:55:46,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130443161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:46,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797561035] [2022-01-18 04:55:46,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:55:46,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:46,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:46,143 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) [2022-01-18 04:55:46,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 04:55:46,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:55:46,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:46,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 04:55:46,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:46,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:46,872 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:46,873 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 26 [2022-01-18 04:55:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:46,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797561035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:46,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:46,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 29 [2022-01-18 04:55:46,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825298428] [2022-01-18 04:55:46,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:46,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 04:55:46,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:46,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 04:55:46,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:55:46,912 INFO L87 Difference]: Start difference. First operand 745 states and 2170 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:48,392 INFO L93 Difference]: Finished difference Result 913 states and 2548 transitions. [2022-01-18 04:55:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 04:55:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:48,393 INFO L225 Difference]: With dead ends: 913 [2022-01-18 04:55:48,393 INFO L226 Difference]: Without dead ends: 909 [2022-01-18 04:55:48,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 04:55:48,394 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 225 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:48,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 322 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:55:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-18 04:55:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 746. [2022-01-18 04:55:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.9194630872483223) internal successors, (2175), 745 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2175 transitions. [2022-01-18 04:55:48,402 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2175 transitions. Word has length 19 [2022-01-18 04:55:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:48,402 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2175 transitions. [2022-01-18 04:55:48,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2175 transitions. [2022-01-18 04:55:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:48,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:48,403 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:48,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-01-18 04:55:48,604 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,SelfDestructingSolverStorable206 [2022-01-18 04:55:48,604 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1816778509, now seen corresponding path program 199 times [2022-01-18 04:55:48,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:48,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616342154] [2022-01-18 04:55:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:48,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:48,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:48,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616342154] [2022-01-18 04:55:48,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616342154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:48,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515219877] [2022-01-18 04:55:48,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:55:48,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:48,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:48,725 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) [2022-01-18 04:55:48,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 04:55:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:55:48,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:49,062 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 87 treesize of output 71 [2022-01-18 04:55:49,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:55:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:49,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:49,357 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:49,357 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 32 treesize of output 27 [2022-01-18 04:55:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:49,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515219877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:49,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:49,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:55:49,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129513972] [2022-01-18 04:55:49,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:49,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:49,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:49,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:49,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:49,395 INFO L87 Difference]: Start difference. First operand 746 states and 2175 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:50,136 INFO L93 Difference]: Finished difference Result 863 states and 2456 transitions. [2022-01-18 04:55:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:55:50,136 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:50,137 INFO L225 Difference]: With dead ends: 863 [2022-01-18 04:55:50,137 INFO L226 Difference]: Without dead ends: 860 [2022-01-18 04:55:50,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 04:55:50,138 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:50,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 217 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:55:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-01-18 04:55:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 746. [2022-01-18 04:55:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.9181208053691274) internal successors, (2174), 745 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2174 transitions. [2022-01-18 04:55:50,146 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2174 transitions. Word has length 19 [2022-01-18 04:55:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:50,146 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2174 transitions. [2022-01-18 04:55:50,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2174 transitions. [2022-01-18 04:55:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:50,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:50,147 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:50,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:50,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:50,363 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1118072047, now seen corresponding path program 200 times [2022-01-18 04:55:50,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:50,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492835454] [2022-01-18 04:55:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:50,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:50,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492835454] [2022-01-18 04:55:50,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492835454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997580289] [2022-01-18 04:55:50,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:55:50,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:50,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:50,481 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) [2022-01-18 04:55:50,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 04:55:50,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:55:50,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:50,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:50,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:55:50,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:55:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:50,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:51,081 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:55:51,081 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 65 treesize of output 56 [2022-01-18 04:55:51,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 04:55:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:51,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997580289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:51,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:51,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:55:51,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238824417] [2022-01-18 04:55:51,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:51,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:51,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:51,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:51,146 INFO L87 Difference]: Start difference. First operand 746 states and 2174 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:51,805 INFO L93 Difference]: Finished difference Result 835 states and 2401 transitions. [2022-01-18 04:55:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:55:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:51,807 INFO L225 Difference]: With dead ends: 835 [2022-01-18 04:55:51,807 INFO L226 Difference]: Without dead ends: 835 [2022-01-18 04:55:51,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:55:51,807 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:51,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 199 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-18 04:55:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 743. [2022-01-18 04:55:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.917789757412399) internal successors, (2165), 742 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) [2022-01-18 04:55:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2165 transitions. [2022-01-18 04:55:51,819 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2165 transitions. Word has length 19 [2022-01-18 04:55:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:51,819 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2165 transitions. [2022-01-18 04:55:51,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2165 transitions. [2022-01-18 04:55:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:51,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:51,820 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:51,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-01-18 04:55:52,036 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,SelfDestructingSolverStorable208 [2022-01-18 04:55:52,036 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:52,036 INFO L85 PathProgramCache]: Analyzing trace with hash 794443575, now seen corresponding path program 201 times [2022-01-18 04:55:52,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:52,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316972045] [2022-01-18 04:55:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:52,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:52,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:52,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316972045] [2022-01-18 04:55:52,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316972045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:52,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150683478] [2022-01-18 04:55:52,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:55:52,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:52,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:52,163 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) [2022-01-18 04:55:52,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 04:55:52,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:55:52,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:52,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:52,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:52,658 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:55:52,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:52,663 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:55:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:52,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150683478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:52,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:52,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:55:52,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517678535] [2022-01-18 04:55:52,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:52,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:52,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:52,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:52,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:52,745 INFO L87 Difference]: Start difference. First operand 743 states and 2165 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:53,127 INFO L93 Difference]: Finished difference Result 799 states and 2283 transitions. [2022-01-18 04:55:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:55:53,127 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:53,128 INFO L225 Difference]: With dead ends: 799 [2022-01-18 04:55:53,128 INFO L226 Difference]: Without dead ends: 799 [2022-01-18 04:55:53,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:55:53,128 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:53,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 160 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-18 04:55:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 741. [2022-01-18 04:55:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 2.9175675675675676) internal successors, (2159), 740 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2159 transitions. [2022-01-18 04:55:53,136 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2159 transitions. Word has length 19 [2022-01-18 04:55:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:53,136 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2159 transitions. [2022-01-18 04:55:53,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2159 transitions. [2022-01-18 04:55:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:53,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:53,137 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:53,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 04:55:53,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:53,338 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1680241855, now seen corresponding path program 202 times [2022-01-18 04:55:53,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:53,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367663077] [2022-01-18 04:55:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:53,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:53,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:53,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367663077] [2022-01-18 04:55:53,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367663077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:53,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545574733] [2022-01-18 04:55:53,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:55:53,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:53,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:53,463 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) [2022-01-18 04:55:53,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 04:55:53,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:55:53,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:53,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:53,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:53,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:54,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:54,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:55:54,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:54,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:55:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:54,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545574733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:54,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:54,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:55:54,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085610671] [2022-01-18 04:55:54,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:54,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:54,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:54,090 INFO L87 Difference]: Start difference. First operand 741 states and 2159 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:54,491 INFO L93 Difference]: Finished difference Result 808 states and 2298 transitions. [2022-01-18 04:55:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:55:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:54,493 INFO L225 Difference]: With dead ends: 808 [2022-01-18 04:55:54,493 INFO L226 Difference]: Without dead ends: 808 [2022-01-18 04:55:54,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:55:54,493 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:54,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 190 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-18 04:55:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 741. [2022-01-18 04:55:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 2.9175675675675676) internal successors, (2159), 740 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2159 transitions. [2022-01-18 04:55:54,507 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2159 transitions. Word has length 19 [2022-01-18 04:55:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:54,507 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2159 transitions. [2022-01-18 04:55:54,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:55:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2159 transitions. [2022-01-18 04:55:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:54,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:54,508 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:54,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-01-18 04:55:54,724 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,SelfDestructingSolverStorable210 [2022-01-18 04:55:54,724 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1620412531, now seen corresponding path program 203 times [2022-01-18 04:55:54,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:54,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756833220] [2022-01-18 04:55:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:54,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:54,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756833220] [2022-01-18 04:55:54,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756833220] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798093273] [2022-01-18 04:55:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:55:54,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:54,850 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) [2022-01-18 04:55:54,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 04:55:54,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:55:54,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:54,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:54,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:55,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:55,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:55,376 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 41 treesize of output 39 [2022-01-18 04:55:55,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:55,381 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 29 treesize of output 27 [2022-01-18 04:55:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:55,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798093273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:55,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:55,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:55:55,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967505869] [2022-01-18 04:55:55,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:55,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:55,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:55,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:55,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:55,459 INFO L87 Difference]: Start difference. First operand 741 states and 2159 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:55,846 INFO L93 Difference]: Finished difference Result 804 states and 2291 transitions. [2022-01-18 04:55:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:55:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:55,847 INFO L225 Difference]: With dead ends: 804 [2022-01-18 04:55:55,847 INFO L226 Difference]: Without dead ends: 804 [2022-01-18 04:55:55,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:55:55,847 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:55,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 180 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-18 04:55:55,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 742. [2022-01-18 04:55:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9163292847503373) internal successors, (2161), 741 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2161 transitions. [2022-01-18 04:55:55,855 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2161 transitions. Word has length 19 [2022-01-18 04:55:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:55,855 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2161 transitions. [2022-01-18 04:55:55,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2161 transitions. [2022-01-18 04:55:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:55,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:55,856 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:55,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-18 04:55:56,056 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,SelfDestructingSolverStorable211 [2022-01-18 04:55:56,057 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1888500745, now seen corresponding path program 204 times [2022-01-18 04:55:56,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:56,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22547348] [2022-01-18 04:55:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:56,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:56,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:56,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22547348] [2022-01-18 04:55:56,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22547348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:56,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830536080] [2022-01-18 04:55:56,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:55:56,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:56,172 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) [2022-01-18 04:55:56,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 04:55:56,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:55:56,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:56,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:56,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:55:56,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:55:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:56,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:56,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:56,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-01-18 04:55:56,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:56,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 51 [2022-01-18 04:55:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:56,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830536080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:56,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:56,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:55:56,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835763432] [2022-01-18 04:55:56,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:56,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:55:56,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:55:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:55:56,876 INFO L87 Difference]: Start difference. First operand 742 states and 2161 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:57,190 INFO L93 Difference]: Finished difference Result 774 states and 2232 transitions. [2022-01-18 04:55:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:55:57,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:57,191 INFO L225 Difference]: With dead ends: 774 [2022-01-18 04:55:57,191 INFO L226 Difference]: Without dead ends: 774 [2022-01-18 04:55:57,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:55:57,192 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:57,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 112 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:55:57,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-01-18 04:55:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 743. [2022-01-18 04:55:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.9150943396226414) internal successors, (2163), 742 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2163 transitions. [2022-01-18 04:55:57,199 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2163 transitions. Word has length 19 [2022-01-18 04:55:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:57,199 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2163 transitions. [2022-01-18 04:55:57,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2163 transitions. [2022-01-18 04:55:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:57,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:57,200 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:57,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 04:55:57,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 04:55:57,401 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash -891183309, now seen corresponding path program 205 times [2022-01-18 04:55:57,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:57,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513877095] [2022-01-18 04:55:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:57,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:57,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513877095] [2022-01-18 04:55:57,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513877095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717954529] [2022-01-18 04:55:57,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:55:57,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:57,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:57,515 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) [2022-01-18 04:55:57,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 04:55:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:57,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:57,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:57,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:58,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:58,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:55:58,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:58,015 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 30 treesize of output 28 [2022-01-18 04:55:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:58,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717954529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:58,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:58,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 04:55:58,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200232394] [2022-01-18 04:55:58,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:58,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 04:55:58,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:58,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 04:55:58,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:55:58,100 INFO L87 Difference]: Start difference. First operand 743 states and 2163 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:55:58,551 INFO L93 Difference]: Finished difference Result 844 states and 2368 transitions. [2022-01-18 04:55:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:55:58,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:55:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:55:58,553 INFO L225 Difference]: With dead ends: 844 [2022-01-18 04:55:58,553 INFO L226 Difference]: Without dead ends: 844 [2022-01-18 04:55:58,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:55:58,553 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:55:58,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 261 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:55:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-01-18 04:55:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 746. [2022-01-18 04:55:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.914093959731544) internal successors, (2171), 745 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2171 transitions. [2022-01-18 04:55:58,561 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2171 transitions. Word has length 19 [2022-01-18 04:55:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:55:58,561 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2171 transitions. [2022-01-18 04:55:58,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:55:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2171 transitions. [2022-01-18 04:55:58,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:55:58,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:55:58,562 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:55:58,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-01-18 04:55:58,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 04:55:58,762 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:55:58,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:55:58,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1215600811, now seen corresponding path program 206 times [2022-01-18 04:55:58,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:55:58,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499204351] [2022-01-18 04:55:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:55:58,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:55:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:55:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:58,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:55:58,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499204351] [2022-01-18 04:55:58,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499204351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:55:58,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820597534] [2022-01-18 04:55:58,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:55:58,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:55:58,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:55:58,888 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) [2022-01-18 04:55:58,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 04:55:58,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:55:58,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:55:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:55:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:55:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:59,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:55:59,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:59,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:55:59,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:55:59,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:55:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:55:59,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820597534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:55:59,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:55:59,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:55:59,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932669986] [2022-01-18 04:55:59,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:55:59,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:55:59,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:55:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:55:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:55:59,493 INFO L87 Difference]: Start difference. First operand 746 states and 2171 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:00,229 INFO L93 Difference]: Finished difference Result 854 states and 2387 transitions. [2022-01-18 04:56:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:56:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:00,230 INFO L225 Difference]: With dead ends: 854 [2022-01-18 04:56:00,230 INFO L226 Difference]: Without dead ends: 854 [2022-01-18 04:56:00,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=1357, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:56:00,230 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:00,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 228 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-01-18 04:56:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 746. [2022-01-18 04:56:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.912751677852349) internal successors, (2170), 745 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2170 transitions. [2022-01-18 04:56:00,239 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2170 transitions. Word has length 19 [2022-01-18 04:56:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:00,239 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2170 transitions. [2022-01-18 04:56:00,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2170 transitions. [2022-01-18 04:56:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:00,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:00,240 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:00,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 04:56:00,440 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,SelfDestructingSolverStorable214 [2022-01-18 04:56:00,440 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash -198557841, now seen corresponding path program 207 times [2022-01-18 04:56:00,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:00,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459845427] [2022-01-18 04:56:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:00,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:00,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:00,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459845427] [2022-01-18 04:56:00,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459845427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:00,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668456586] [2022-01-18 04:56:00,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:56:00,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:00,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:00,552 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) [2022-01-18 04:56:00,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 04:56:00,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:56:00,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:00,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 04:56:00,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:00,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:56:00,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:56:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:00,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:01,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:01,071 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 73 treesize of output 67 [2022-01-18 04:56:01,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:01,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 51 [2022-01-18 04:56:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:01,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668456586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:01,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:01,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:01,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882636871] [2022-01-18 04:56:01,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:01,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:01,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:01,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:01,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:01,199 INFO L87 Difference]: Start difference. First operand 746 states and 2170 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:01,647 INFO L93 Difference]: Finished difference Result 836 states and 2335 transitions. [2022-01-18 04:56:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:56:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:01,649 INFO L225 Difference]: With dead ends: 836 [2022-01-18 04:56:01,649 INFO L226 Difference]: Without dead ends: 834 [2022-01-18 04:56:01,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:56:01,649 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:01,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 310 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:01,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-01-18 04:56:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 746. [2022-01-18 04:56:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.911409395973154) internal successors, (2169), 745 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2169 transitions. [2022-01-18 04:56:01,657 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2169 transitions. Word has length 19 [2022-01-18 04:56:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:01,657 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2169 transitions. [2022-01-18 04:56:01,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2169 transitions. [2022-01-18 04:56:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:01,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:01,658 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:01,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-01-18 04:56:01,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:01,858 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:01,858 INFO L85 PathProgramCache]: Analyzing trace with hash -114274377, now seen corresponding path program 208 times [2022-01-18 04:56:01,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:01,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073225302] [2022-01-18 04:56:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:01,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:02,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:02,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073225302] [2022-01-18 04:56:02,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073225302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:02,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013553771] [2022-01-18 04:56:02,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:56:02,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:02,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:02,007 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) [2022-01-18 04:56:02,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 04:56:02,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:56:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:02,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:02,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:02,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:02,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:02,451 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 33 treesize of output 33 [2022-01-18 04:56:02,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:02,456 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 25 treesize of output 25 [2022-01-18 04:56:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:02,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013553771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:02,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:02,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:02,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919348283] [2022-01-18 04:56:02,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:02,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:02,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:02,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:02,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:02,565 INFO L87 Difference]: Start difference. First operand 746 states and 2169 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:03,278 INFO L93 Difference]: Finished difference Result 921 states and 2514 transitions. [2022-01-18 04:56:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:56:03,278 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:03,279 INFO L225 Difference]: With dead ends: 921 [2022-01-18 04:56:03,280 INFO L226 Difference]: Without dead ends: 921 [2022-01-18 04:56:03,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 04:56:03,280 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 127 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:03,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 231 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-01-18 04:56:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 752. [2022-01-18 04:56:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.910785619174434) internal successors, (2186), 751 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2186 transitions. [2022-01-18 04:56:03,288 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2186 transitions. Word has length 19 [2022-01-18 04:56:03,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:03,288 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2186 transitions. [2022-01-18 04:56:03,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2186 transitions. [2022-01-18 04:56:03,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:03,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:03,289 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:03,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-01-18 04:56:03,489 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,SelfDestructingSolverStorable216 [2022-01-18 04:56:03,490 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 687240439, now seen corresponding path program 209 times [2022-01-18 04:56:03,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:03,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301149474] [2022-01-18 04:56:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:03,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:03,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:03,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301149474] [2022-01-18 04:56:03,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301149474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:03,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55807082] [2022-01-18 04:56:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:56:03,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:03,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:03,619 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) [2022-01-18 04:56:03,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 04:56:03,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:56:03,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:03,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:03,919 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 98 treesize of output 82 [2022-01-18 04:56:03,921 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 82 treesize of output 66 [2022-01-18 04:56:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:03,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:04,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:04,076 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 65 treesize of output 61 [2022-01-18 04:56:04,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:04,082 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 49 [2022-01-18 04:56:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:04,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55807082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:04,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:04,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 04:56:04,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019395423] [2022-01-18 04:56:04,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:04,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 04:56:04,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 04:56:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:56:04,223 INFO L87 Difference]: Start difference. First operand 752 states and 2186 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:04,925 INFO L93 Difference]: Finished difference Result 865 states and 2403 transitions. [2022-01-18 04:56:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:56:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:04,926 INFO L225 Difference]: With dead ends: 865 [2022-01-18 04:56:04,926 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 04:56:04,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:56:04,926 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 129 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:04,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 243 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 04:56:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 751. [2022-01-18 04:56:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 2.904) internal successors, (2178), 750 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2178 transitions. [2022-01-18 04:56:04,934 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2178 transitions. Word has length 19 [2022-01-18 04:56:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:04,934 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2178 transitions. [2022-01-18 04:56:04,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2178 transitions. [2022-01-18 04:56:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:04,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:04,935 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:04,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-18 04:56:05,135 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,SelfDestructingSolverStorable217 [2022-01-18 04:56:05,136 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:05,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1500942737, now seen corresponding path program 210 times [2022-01-18 04:56:05,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:05,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947532647] [2022-01-18 04:56:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:05,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:05,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947532647] [2022-01-18 04:56:05,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947532647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773522923] [2022-01-18 04:56:05,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:56:05,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:05,299 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) [2022-01-18 04:56:05,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 04:56:05,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:56:05,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:05,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:05,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:56:05,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:56:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:05,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:05,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:05,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-01-18 04:56:05,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:05,776 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 25 treesize of output 25 [2022-01-18 04:56:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:05,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773522923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:05,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:05,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:05,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087894844] [2022-01-18 04:56:05,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:05,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:05,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:05,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:05,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:05,894 INFO L87 Difference]: Start difference. First operand 751 states and 2178 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:06,556 INFO L93 Difference]: Finished difference Result 889 states and 2479 transitions. [2022-01-18 04:56:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 04:56:06,557 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:06,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:06,558 INFO L225 Difference]: With dead ends: 889 [2022-01-18 04:56:06,558 INFO L226 Difference]: Without dead ends: 887 [2022-01-18 04:56:06,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 04:56:06,558 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 179 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:06,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 170 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-01-18 04:56:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 759. [2022-01-18 04:56:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.9063324538258577) internal successors, (2203), 758 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2203 transitions. [2022-01-18 04:56:06,567 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2203 transitions. Word has length 19 [2022-01-18 04:56:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:06,567 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2203 transitions. [2022-01-18 04:56:06,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2203 transitions. [2022-01-18 04:56:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:06,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:06,568 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:06,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 04:56:06,773 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,SelfDestructingSolverStorable218 [2022-01-18 04:56:06,773 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash 645228023, now seen corresponding path program 211 times [2022-01-18 04:56:06,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:06,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992201754] [2022-01-18 04:56:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:06,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:06,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:06,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992201754] [2022-01-18 04:56:06,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992201754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:06,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309705890] [2022-01-18 04:56:06,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:56:06,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:06,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:06,909 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) [2022-01-18 04:56:06,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 04:56:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:07,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:07,476 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 04:56:07,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 58 [2022-01-18 04:56:07,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:56:07,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:07,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 04:56:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:07,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309705890] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:07,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:07,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:56:07,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983460780] [2022-01-18 04:56:07,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:07,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:56:07,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:56:07,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:07,623 INFO L87 Difference]: Start difference. First operand 759 states and 2203 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:08,122 INFO L93 Difference]: Finished difference Result 839 states and 2377 transitions. [2022-01-18 04:56:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:56:08,122 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:08,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:08,123 INFO L225 Difference]: With dead ends: 839 [2022-01-18 04:56:08,123 INFO L226 Difference]: Without dead ends: 839 [2022-01-18 04:56:08,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:56:08,123 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:08,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 148 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-01-18 04:56:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 761. [2022-01-18 04:56:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 2.905263157894737) internal successors, (2208), 760 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2208 transitions. [2022-01-18 04:56:08,131 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2208 transitions. Word has length 19 [2022-01-18 04:56:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:08,131 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2208 transitions. [2022-01-18 04:56:08,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2208 transitions. [2022-01-18 04:56:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:08,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:08,132 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:08,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:08,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:08,333 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:08,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:08,333 INFO L85 PathProgramCache]: Analyzing trace with hash -565930585, now seen corresponding path program 212 times [2022-01-18 04:56:08,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:08,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947617767] [2022-01-18 04:56:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:08,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:08,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947617767] [2022-01-18 04:56:08,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947617767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660619819] [2022-01-18 04:56:08,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:56:08,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:08,444 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) [2022-01-18 04:56:08,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 04:56:08,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:56:08,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:08,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:08,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:09,032 INFO L353 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-01-18 04:56:09,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 64 [2022-01-18 04:56:09,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:56:09,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:09,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-01-18 04:56:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:09,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660619819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:09,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:09,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 04:56:09,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923543591] [2022-01-18 04:56:09,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:09,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:56:09,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:56:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:56:09,160 INFO L87 Difference]: Start difference. First operand 761 states and 2208 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:09,643 INFO L93 Difference]: Finished difference Result 856 states and 2407 transitions. [2022-01-18 04:56:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:56:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:09,644 INFO L225 Difference]: With dead ends: 856 [2022-01-18 04:56:09,644 INFO L226 Difference]: Without dead ends: 856 [2022-01-18 04:56:09,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 04:56:09,644 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:09,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 164 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-01-18 04:56:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 762. [2022-01-18 04:56:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.9053876478318004) internal successors, (2211), 761 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2211 transitions. [2022-01-18 04:56:09,652 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2211 transitions. Word has length 19 [2022-01-18 04:56:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:09,652 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2211 transitions. [2022-01-18 04:56:09,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2211 transitions. [2022-01-18 04:56:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:09,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:09,653 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:09,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-18 04:56:09,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:09,854 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash 319867695, now seen corresponding path program 213 times [2022-01-18 04:56:09,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:09,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263383199] [2022-01-18 04:56:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:09,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:09,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263383199] [2022-01-18 04:56:09,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263383199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259197108] [2022-01-18 04:56:09,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:56:09,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:09,989 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) [2022-01-18 04:56:09,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 04:56:10,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:56:10,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:10,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:10,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:10,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:10,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:10,508 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 41 treesize of output 39 [2022-01-18 04:56:10,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:10,513 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 29 treesize of output 27 [2022-01-18 04:56:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:10,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259197108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:10,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:10,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:56:10,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829605373] [2022-01-18 04:56:10,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:10,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:56:10,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:10,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:56:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:10,595 INFO L87 Difference]: Start difference. First operand 762 states and 2211 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:11,271 INFO L93 Difference]: Finished difference Result 834 states and 2358 transitions. [2022-01-18 04:56:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:56:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:11,272 INFO L225 Difference]: With dead ends: 834 [2022-01-18 04:56:11,272 INFO L226 Difference]: Without dead ends: 834 [2022-01-18 04:56:11,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:56:11,272 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:11,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 168 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-01-18 04:56:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 763. [2022-01-18 04:56:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 2.905511811023622) internal successors, (2214), 762 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2214 transitions. [2022-01-18 04:56:11,280 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2214 transitions. Word has length 19 [2022-01-18 04:56:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:11,280 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2214 transitions. [2022-01-18 04:56:11,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2214 transitions. [2022-01-18 04:56:11,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:11,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:11,281 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:11,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-01-18 04:56:11,481 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,SelfDestructingSolverStorable221 [2022-01-18 04:56:11,481 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1868315481, now seen corresponding path program 214 times [2022-01-18 04:56:11,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:11,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019190210] [2022-01-18 04:56:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:11,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:11,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019190210] [2022-01-18 04:56:11,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019190210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412129163] [2022-01-18 04:56:11,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:56:11,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:11,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:11,602 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) [2022-01-18 04:56:11,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 04:56:11,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:56:11,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:11,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:12,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:12,259 INFO L353 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-01-18 04:56:12,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 64 [2022-01-18 04:56:12,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:56:12,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:12,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-01-18 04:56:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:12,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412129163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:12,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:12,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 04:56:12,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146618716] [2022-01-18 04:56:12,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:12,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:56:12,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:56:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:56:12,402 INFO L87 Difference]: Start difference. First operand 763 states and 2214 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:13,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:13,198 INFO L93 Difference]: Finished difference Result 862 states and 2424 transitions. [2022-01-18 04:56:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:56:13,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:13,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:13,199 INFO L225 Difference]: With dead ends: 862 [2022-01-18 04:56:13,199 INFO L226 Difference]: Without dead ends: 862 [2022-01-18 04:56:13,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 04:56:13,200 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:13,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 228 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:13,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-01-18 04:56:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 765. [2022-01-18 04:56:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 2.904450261780105) internal successors, (2219), 764 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) [2022-01-18 04:56:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2219 transitions. [2022-01-18 04:56:13,208 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2219 transitions. Word has length 19 [2022-01-18 04:56:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:13,208 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2219 transitions. [2022-01-18 04:56:13,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2219 transitions. [2022-01-18 04:56:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:13,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:13,209 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:13,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-18 04:56:13,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-01-18 04:56:13,409 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:13,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1082261461, now seen corresponding path program 215 times [2022-01-18 04:56:13,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:13,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213983959] [2022-01-18 04:56:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:13,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:13,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:13,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213983959] [2022-01-18 04:56:13,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213983959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:13,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751843532] [2022-01-18 04:56:13,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:56:13,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:13,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:13,529 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) [2022-01-18 04:56:13,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 04:56:13,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:56:13,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:13,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:13,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:13,892 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 96 treesize of output 80 [2022-01-18 04:56:13,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:56:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:14,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:14,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-01-18 04:56:14,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:14,116 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 57 treesize of output 51 [2022-01-18 04:56:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:14,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751843532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:14,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:14,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:56:14,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121586919] [2022-01-18 04:56:14,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:14,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:56:14,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:14,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:56:14,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:14,248 INFO L87 Difference]: Start difference. First operand 765 states and 2219 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:14,689 INFO L93 Difference]: Finished difference Result 850 states and 2363 transitions. [2022-01-18 04:56:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:56:14,689 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:14,690 INFO L225 Difference]: With dead ends: 850 [2022-01-18 04:56:14,691 INFO L226 Difference]: Without dead ends: 848 [2022-01-18 04:56:14,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:56:14,691 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:14,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 301 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-18 04:56:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 765. [2022-01-18 04:56:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 2.904450261780105) internal successors, (2219), 764 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) [2022-01-18 04:56:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2219 transitions. [2022-01-18 04:56:14,699 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2219 transitions. Word has length 19 [2022-01-18 04:56:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:14,699 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2219 transitions. [2022-01-18 04:56:14,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2219 transitions. [2022-01-18 04:56:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:14,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:14,700 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:14,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-01-18 04:56:14,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:14,901 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1436534225, now seen corresponding path program 216 times [2022-01-18 04:56:14,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:14,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260743835] [2022-01-18 04:56:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:14,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:15,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:15,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260743835] [2022-01-18 04:56:15,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260743835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:15,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213850372] [2022-01-18 04:56:15,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:56:15,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:15,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:15,023 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) [2022-01-18 04:56:15,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 04:56:15,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:56:15,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:15,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:15,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:15,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:15,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:15,494 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-18 04:56:15,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:15,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 04:56:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:15,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213850372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:15,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:15,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:15,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934618444] [2022-01-18 04:56:15,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:15,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:15,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:15,595 INFO L87 Difference]: Start difference. First operand 765 states and 2219 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:15,888 INFO L93 Difference]: Finished difference Result 850 states and 2388 transitions. [2022-01-18 04:56:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:56:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:15,890 INFO L225 Difference]: With dead ends: 850 [2022-01-18 04:56:15,890 INFO L226 Difference]: Without dead ends: 850 [2022-01-18 04:56:15,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:15,890 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:15,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 191 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-18 04:56:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 758. [2022-01-18 04:56:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.9009247027741085) internal successors, (2196), 757 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2196 transitions. [2022-01-18 04:56:15,898 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2196 transitions. Word has length 19 [2022-01-18 04:56:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:15,898 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2196 transitions. [2022-01-18 04:56:15,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2196 transitions. [2022-01-18 04:56:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:15,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:15,899 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:15,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-01-18 04:56:16,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-18 04:56:16,099 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:16,100 INFO L85 PathProgramCache]: Analyzing trace with hash 670249895, now seen corresponding path program 217 times [2022-01-18 04:56:16,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:16,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003746045] [2022-01-18 04:56:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:16,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:16,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:16,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003746045] [2022-01-18 04:56:16,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003746045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:16,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157174250] [2022-01-18 04:56:16,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:56:16,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:16,225 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) [2022-01-18 04:56:16,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 04:56:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:16,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:16,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:16,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:16,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:56:16,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:16,707 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 30 treesize of output 28 [2022-01-18 04:56:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:16,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157174250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:16,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:16,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:16,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877730807] [2022-01-18 04:56:16,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:16,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:16,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:16,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:16,806 INFO L87 Difference]: Start difference. First operand 758 states and 2196 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:17,373 INFO L93 Difference]: Finished difference Result 888 states and 2468 transitions. [2022-01-18 04:56:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:56:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:17,374 INFO L225 Difference]: With dead ends: 888 [2022-01-18 04:56:17,374 INFO L226 Difference]: Without dead ends: 888 [2022-01-18 04:56:17,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:56:17,374 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:17,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 155 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-18 04:56:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 759. [2022-01-18 04:56:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.899736147757256) internal successors, (2198), 758 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2198 transitions. [2022-01-18 04:56:17,382 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2198 transitions. Word has length 19 [2022-01-18 04:56:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:17,382 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2198 transitions. [2022-01-18 04:56:17,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2198 transitions. [2022-01-18 04:56:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:17,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:17,383 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:17,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-01-18 04:56:17,583 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,SelfDestructingSolverStorable225 [2022-01-18 04:56:17,584 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1456303915, now seen corresponding path program 218 times [2022-01-18 04:56:17,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:17,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790296619] [2022-01-18 04:56:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:17,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:17,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790296619] [2022-01-18 04:56:17,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790296619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:17,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248306494] [2022-01-18 04:56:17,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:56:17,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:17,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:17,706 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) [2022-01-18 04:56:17,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 04:56:17,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:56:17,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:17,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:18,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:56:18,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:56:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:18,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:18,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:18,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-01-18 04:56:18,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:18,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 51 [2022-01-18 04:56:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:18,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248306494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:18,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:18,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:18,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118964675] [2022-01-18 04:56:18,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:18,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:18,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:18,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:18,386 INFO L87 Difference]: Start difference. First operand 759 states and 2198 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:18,779 INFO L93 Difference]: Finished difference Result 834 states and 2337 transitions. [2022-01-18 04:56:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:56:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:18,780 INFO L225 Difference]: With dead ends: 834 [2022-01-18 04:56:18,780 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 04:56:18,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:56:18,781 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:18,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 196 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 04:56:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 756. [2022-01-18 04:56:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.899337748344371) internal successors, (2189), 755 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2189 transitions. [2022-01-18 04:56:18,789 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2189 transitions. Word has length 19 [2022-01-18 04:56:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:18,789 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2189 transitions. [2022-01-18 04:56:18,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2189 transitions. [2022-01-18 04:56:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:18,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:18,789 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:18,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:18,990 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,SelfDestructingSolverStorable226 [2022-01-18 04:56:18,990 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1498574963, now seen corresponding path program 219 times [2022-01-18 04:56:18,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:18,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48042920] [2022-01-18 04:56:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:18,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:19,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:19,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48042920] [2022-01-18 04:56:19,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48042920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:19,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997324089] [2022-01-18 04:56:19,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:56:19,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:19,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:19,148 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) [2022-01-18 04:56:19,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 04:56:19,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:56:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:19,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:19,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:19,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:56:19,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:56:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:19,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:19,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:19,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 59 [2022-01-18 04:56:19,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:19,640 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 51 treesize of output 47 [2022-01-18 04:56:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:19,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997324089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:19,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:19,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:19,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110686197] [2022-01-18 04:56:19,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:19,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:19,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:19,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:19,797 INFO L87 Difference]: Start difference. First operand 756 states and 2189 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:20,179 INFO L93 Difference]: Finished difference Result 831 states and 2315 transitions. [2022-01-18 04:56:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:56:20,179 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:20,180 INFO L225 Difference]: With dead ends: 831 [2022-01-18 04:56:20,180 INFO L226 Difference]: Without dead ends: 822 [2022-01-18 04:56:20,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 04:56:20,180 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:20,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 190 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:20,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-01-18 04:56:20,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 750. [2022-01-18 04:56:20,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 2.890520694259012) internal successors, (2165), 749 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) [2022-01-18 04:56:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2165 transitions. [2022-01-18 04:56:20,188 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2165 transitions. Word has length 19 [2022-01-18 04:56:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:20,188 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2165 transitions. [2022-01-18 04:56:20,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2165 transitions. [2022-01-18 04:56:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:20,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:20,189 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:20,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-01-18 04:56:20,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:20,390 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:20,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1064437013, now seen corresponding path program 220 times [2022-01-18 04:56:20,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:20,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604471012] [2022-01-18 04:56:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:20,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:20,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604471012] [2022-01-18 04:56:20,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604471012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939626852] [2022-01-18 04:56:20,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:56:20,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:20,532 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) [2022-01-18 04:56:20,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 04:56:20,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:56:20,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:20,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:20,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:20,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-01-18 04:56:20,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:20,989 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 25 treesize of output 25 [2022-01-18 04:56:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:21,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939626852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:21,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:21,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:21,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549474845] [2022-01-18 04:56:21,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:21,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:21,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:21,101 INFO L87 Difference]: Start difference. First operand 750 states and 2165 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:21,581 INFO L93 Difference]: Finished difference Result 875 states and 2424 transitions. [2022-01-18 04:56:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:56:21,581 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:21,582 INFO L225 Difference]: With dead ends: 875 [2022-01-18 04:56:21,582 INFO L226 Difference]: Without dead ends: 875 [2022-01-18 04:56:21,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:56:21,583 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 84 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:21,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 243 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-01-18 04:56:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 754. [2022-01-18 04:56:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.893758300132802) internal successors, (2179), 753 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2179 transitions. [2022-01-18 04:56:21,591 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2179 transitions. Word has length 19 [2022-01-18 04:56:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:21,591 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2179 transitions. [2022-01-18 04:56:21,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2179 transitions. [2022-01-18 04:56:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:21,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:21,592 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:21,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-18 04:56:21,792 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,SelfDestructingSolverStorable228 [2022-01-18 04:56:21,793 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:21,793 INFO L85 PathProgramCache]: Analyzing trace with hash -262922197, now seen corresponding path program 221 times [2022-01-18 04:56:21,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:21,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33354069] [2022-01-18 04:56:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:21,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:21,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:21,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33354069] [2022-01-18 04:56:21,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33354069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:21,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682713454] [2022-01-18 04:56:21,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:56:21,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:21,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:21,936 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) [2022-01-18 04:56:21,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 04:56:21,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 04:56:21,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:21,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:22,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:56:22,265 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 82 treesize of output 66 [2022-01-18 04:56:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:22,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:22,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:22,426 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 65 treesize of output 61 [2022-01-18 04:56:22,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:22,432 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 53 treesize of output 49 [2022-01-18 04:56:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:22,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682713454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:22,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:22,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:22,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121877249] [2022-01-18 04:56:22,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:22,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:22,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:22,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:22,622 INFO L87 Difference]: Start difference. First operand 754 states and 2179 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:23,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:23,196 INFO L93 Difference]: Finished difference Result 855 states and 2368 transitions. [2022-01-18 04:56:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:56:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:23,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:23,198 INFO L225 Difference]: With dead ends: 855 [2022-01-18 04:56:23,198 INFO L226 Difference]: Without dead ends: 853 [2022-01-18 04:56:23,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:56:23,198 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:23,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 235 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:23,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-18 04:56:23,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 750. [2022-01-18 04:56:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 2.885180240320427) internal successors, (2161), 749 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2161 transitions. [2022-01-18 04:56:23,206 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2161 transitions. Word has length 19 [2022-01-18 04:56:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:23,206 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2161 transitions. [2022-01-18 04:56:23,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2161 transitions. [2022-01-18 04:56:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:23,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:23,207 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:23,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:23,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:23,407 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1106449429, now seen corresponding path program 222 times [2022-01-18 04:56:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438827407] [2022-01-18 04:56:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:23,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:23,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438827407] [2022-01-18 04:56:23,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438827407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93476887] [2022-01-18 04:56:23,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:56:23,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:23,554 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) [2022-01-18 04:56:23,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 04:56:23,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:56:23,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:23,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:23,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:23,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:56:23,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:56:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:23,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:24,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:24,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 59 [2022-01-18 04:56:24,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:24,034 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 51 treesize of output 47 [2022-01-18 04:56:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:24,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93476887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:24,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:24,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:24,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816104563] [2022-01-18 04:56:24,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:24,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:24,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:24,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:24,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:24,206 INFO L87 Difference]: Start difference. First operand 750 states and 2161 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:25,144 INFO L93 Difference]: Finished difference Result 913 states and 2469 transitions. [2022-01-18 04:56:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:56:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:25,145 INFO L225 Difference]: With dead ends: 913 [2022-01-18 04:56:25,145 INFO L226 Difference]: Without dead ends: 910 [2022-01-18 04:56:25,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=1764, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 04:56:25,146 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 132 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:25,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 247 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:25,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-01-18 04:56:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 750. [2022-01-18 04:56:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 2.8731642189586113) internal successors, (2152), 749 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2152 transitions. [2022-01-18 04:56:25,154 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2152 transitions. Word has length 19 [2022-01-18 04:56:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:25,154 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2152 transitions. [2022-01-18 04:56:25,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2152 transitions. [2022-01-18 04:56:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:25,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:25,155 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:25,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-18 04:56:25,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:25,355 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1843861923, now seen corresponding path program 223 times [2022-01-18 04:56:25,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215844873] [2022-01-18 04:56:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:25,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:25,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:25,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215844873] [2022-01-18 04:56:25,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215844873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:25,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009848736] [2022-01-18 04:56:25,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:56:25,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:25,499 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) [2022-01-18 04:56:25,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 04:56:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:25,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:25,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:25,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-01-18 04:56:25,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:56:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:25,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:26,139 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 04:56:26,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 62 [2022-01-18 04:56:26,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:56:26,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:26,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-01-18 04:56:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:26,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009848736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:26,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:26,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:56:26,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348683923] [2022-01-18 04:56:26,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:26,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:56:26,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:56:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:26,278 INFO L87 Difference]: Start difference. First operand 750 states and 2152 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:27,265 INFO L93 Difference]: Finished difference Result 930 states and 2555 transitions. [2022-01-18 04:56:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:56:27,265 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:27,266 INFO L225 Difference]: With dead ends: 930 [2022-01-18 04:56:27,266 INFO L226 Difference]: Without dead ends: 928 [2022-01-18 04:56:27,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 04:56:27,267 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 184 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:27,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 156 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-18 04:56:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 764. [2022-01-18 04:56:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.865006553079948) internal successors, (2186), 763 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2186 transitions. [2022-01-18 04:56:27,275 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2186 transitions. Word has length 19 [2022-01-18 04:56:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:27,275 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2186 transitions. [2022-01-18 04:56:27,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2186 transitions. [2022-01-18 04:56:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:27,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:27,276 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:27,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:27,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:27,476 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash -304934613, now seen corresponding path program 224 times [2022-01-18 04:56:27,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:27,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187699608] [2022-01-18 04:56:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:27,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:27,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:27,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187699608] [2022-01-18 04:56:27,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187699608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:27,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621885106] [2022-01-18 04:56:27,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:56:27,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:27,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:27,618 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) [2022-01-18 04:56:27,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 04:56:27,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:56:27,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:27,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:27,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:28,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:28,067 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 33 treesize of output 33 [2022-01-18 04:56:28,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:28,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-01-18 04:56:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:28,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621885106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:28,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:28,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:28,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098891426] [2022-01-18 04:56:28,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:28,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:28,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:28,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:28,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:28,191 INFO L87 Difference]: Start difference. First operand 764 states and 2186 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:28,745 INFO L93 Difference]: Finished difference Result 851 states and 2369 transitions. [2022-01-18 04:56:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:56:28,745 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:28,746 INFO L225 Difference]: With dead ends: 851 [2022-01-18 04:56:28,746 INFO L226 Difference]: Without dead ends: 851 [2022-01-18 04:56:28,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:56:28,747 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:28,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 148 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-01-18 04:56:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 760. [2022-01-18 04:56:28,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.862977602108037) internal successors, (2173), 759 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2173 transitions. [2022-01-18 04:56:28,755 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2173 transitions. Word has length 19 [2022-01-18 04:56:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:28,755 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2173 transitions. [2022-01-18 04:56:28,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2173 transitions. [2022-01-18 04:56:28,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:28,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:28,756 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:28,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-01-18 04:56:28,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:28,959 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:28,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1565307093, now seen corresponding path program 225 times [2022-01-18 04:56:28,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:28,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713782909] [2022-01-18 04:56:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:28,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:29,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713782909] [2022-01-18 04:56:29,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713782909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740601252] [2022-01-18 04:56:29,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:56:29,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:29,081 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) [2022-01-18 04:56:29,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 04:56:29,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:56:29,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:29,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:29,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:56:29,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:56:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:29,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:29,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:29,615 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 41 treesize of output 39 [2022-01-18 04:56:29,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:29,620 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 29 treesize of output 27 [2022-01-18 04:56:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:29,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740601252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:29,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:29,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:29,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539565883] [2022-01-18 04:56:29,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:29,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:29,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:29,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:29,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:29,714 INFO L87 Difference]: Start difference. First operand 760 states and 2173 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:30,731 INFO L93 Difference]: Finished difference Result 907 states and 2499 transitions. [2022-01-18 04:56:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 04:56:30,731 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:30,732 INFO L225 Difference]: With dead ends: 907 [2022-01-18 04:56:30,732 INFO L226 Difference]: Without dead ends: 905 [2022-01-18 04:56:30,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=344, Invalid=2008, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 04:56:30,732 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 159 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:30,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 164 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-01-18 04:56:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 758. [2022-01-18 04:56:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.8626155878467636) internal successors, (2167), 757 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2167 transitions. [2022-01-18 04:56:30,740 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2167 transitions. Word has length 19 [2022-01-18 04:56:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:30,740 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2167 transitions. [2022-01-18 04:56:30,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2167 transitions. [2022-01-18 04:56:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:30,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:30,741 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:30,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:30,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-01-18 04:56:30,942 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash 580863667, now seen corresponding path program 226 times [2022-01-18 04:56:30,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:30,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134785376] [2022-01-18 04:56:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:30,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:31,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:31,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134785376] [2022-01-18 04:56:31,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134785376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:31,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245791332] [2022-01-18 04:56:31,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:56:31,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:31,090 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) [2022-01-18 04:56:31,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 04:56:31,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:56:31,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:31,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:31,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:31,681 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 04:56:31,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 62 [2022-01-18 04:56:31,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:56:31,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:31,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-01-18 04:56:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:31,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245791332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:31,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:31,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:56:31,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497584636] [2022-01-18 04:56:31,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:31,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:56:31,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:56:31,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:31,836 INFO L87 Difference]: Start difference. First operand 758 states and 2167 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:32,618 INFO L93 Difference]: Finished difference Result 872 states and 2415 transitions. [2022-01-18 04:56:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:56:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:32,620 INFO L225 Difference]: With dead ends: 872 [2022-01-18 04:56:32,620 INFO L226 Difference]: Without dead ends: 872 [2022-01-18 04:56:32,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 04:56:32,620 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:32,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 157 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-18 04:56:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 748. [2022-01-18 04:56:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.862115127175368) internal successors, (2138), 747 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2138 transitions. [2022-01-18 04:56:32,628 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2138 transitions. Word has length 19 [2022-01-18 04:56:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:32,628 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2138 transitions. [2022-01-18 04:56:32,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2138 transitions. [2022-01-18 04:56:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:32,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:32,629 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:32,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:32,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 04:56:32,830 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1607319509, now seen corresponding path program 227 times [2022-01-18 04:56:32,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:32,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173976483] [2022-01-18 04:56:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:32,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:32,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173976483] [2022-01-18 04:56:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173976483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282767125] [2022-01-18 04:56:32,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:56:32,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:32,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:32,957 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) [2022-01-18 04:56:32,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 04:56:33,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:56:33,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:33,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:33,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:33,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:33,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:33,450 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 42 treesize of output 40 [2022-01-18 04:56:33,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:33,455 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 30 treesize of output 28 [2022-01-18 04:56:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:33,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282767125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:33,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:33,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:33,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327125363] [2022-01-18 04:56:33,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:33,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:33,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:33,550 INFO L87 Difference]: Start difference. First operand 748 states and 2138 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:34,019 INFO L93 Difference]: Finished difference Result 826 states and 2302 transitions. [2022-01-18 04:56:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:56:34,019 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:34,020 INFO L225 Difference]: With dead ends: 826 [2022-01-18 04:56:34,020 INFO L226 Difference]: Without dead ends: 826 [2022-01-18 04:56:34,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:56:34,021 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:34,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 138 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-01-18 04:56:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 744. [2022-01-18 04:56:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.861372812920592) internal successors, (2126), 743 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2126 transitions. [2022-01-18 04:56:34,029 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2126 transitions. Word has length 19 [2022-01-18 04:56:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:34,029 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2126 transitions. [2022-01-18 04:56:34,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2126 transitions. [2022-01-18 04:56:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:34,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:34,030 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:34,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-01-18 04:56:34,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-01-18 04:56:34,230 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1357777353, now seen corresponding path program 228 times [2022-01-18 04:56:34,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:34,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551399031] [2022-01-18 04:56:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:34,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:34,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:34,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551399031] [2022-01-18 04:56:34,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551399031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:34,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690323936] [2022-01-18 04:56:34,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:56:34,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:34,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:34,341 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) [2022-01-18 04:56:34,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 04:56:34,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:56:34,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:34,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:34,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:34,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:34,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:56:34,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:34,834 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:56:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:34,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690323936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:34,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:34,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:56:34,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288474708] [2022-01-18 04:56:34,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:34,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:56:34,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:34,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:56:34,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:34,932 INFO L87 Difference]: Start difference. First operand 744 states and 2126 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:35,270 INFO L93 Difference]: Finished difference Result 810 states and 2254 transitions. [2022-01-18 04:56:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:56:35,271 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:35,272 INFO L225 Difference]: With dead ends: 810 [2022-01-18 04:56:35,272 INFO L226 Difference]: Without dead ends: 810 [2022-01-18 04:56:35,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:56:35,272 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:35,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 175 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-01-18 04:56:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 747. [2022-01-18 04:56:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 2.8619302949061662) internal successors, (2135), 746 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2135 transitions. [2022-01-18 04:56:35,279 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2135 transitions. Word has length 19 [2022-01-18 04:56:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:35,280 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2135 transitions. [2022-01-18 04:56:35,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2135 transitions. [2022-01-18 04:56:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:35,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:35,280 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:35,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:35,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:35,481 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -471979073, now seen corresponding path program 229 times [2022-01-18 04:56:35,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:35,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707023192] [2022-01-18 04:56:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:35,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:35,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:35,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707023192] [2022-01-18 04:56:35,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707023192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:35,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213358101] [2022-01-18 04:56:35,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:56:35,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:35,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:35,597 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) [2022-01-18 04:56:35,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 04:56:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:35,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:36,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:36,140 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 40 [2022-01-18 04:56:36,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:36,145 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 30 treesize of output 28 [2022-01-18 04:56:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213358101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:36,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:36,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:56:36,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123540459] [2022-01-18 04:56:36,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:36,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:56:36,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:56:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:36,234 INFO L87 Difference]: Start difference. First operand 747 states and 2135 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:36,922 INFO L93 Difference]: Finished difference Result 832 states and 2308 transitions. [2022-01-18 04:56:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:56:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:36,924 INFO L225 Difference]: With dead ends: 832 [2022-01-18 04:56:36,924 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 04:56:36,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:56:36,924 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:36,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 178 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 04:56:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 744. [2022-01-18 04:56:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.861372812920592) internal successors, (2126), 743 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2126 transitions. [2022-01-18 04:56:36,932 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2126 transitions. Word has length 19 [2022-01-18 04:56:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:36,932 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2126 transitions. [2022-01-18 04:56:36,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2126 transitions. [2022-01-18 04:56:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:36,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:36,933 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:36,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:37,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:37,133 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:37,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1634805047, now seen corresponding path program 230 times [2022-01-18 04:56:37,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:37,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332482876] [2022-01-18 04:56:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:37,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:37,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:37,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332482876] [2022-01-18 04:56:37,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332482876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729931585] [2022-01-18 04:56:37,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:56:37,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:37,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:37,256 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) [2022-01-18 04:56:37,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 04:56:37,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:56:37,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:37,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:37,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:37,798 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 42 treesize of output 40 [2022-01-18 04:56:37,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:37,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:56:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:37,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729931585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:37,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:37,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:56:37,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6523486] [2022-01-18 04:56:37,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:37,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:56:37,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:37,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:56:37,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:37,889 INFO L87 Difference]: Start difference. First operand 744 states and 2126 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:38,818 INFO L93 Difference]: Finished difference Result 852 states and 2347 transitions. [2022-01-18 04:56:38,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:56:38,818 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:38,819 INFO L225 Difference]: With dead ends: 852 [2022-01-18 04:56:38,819 INFO L226 Difference]: Without dead ends: 852 [2022-01-18 04:56:38,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 04:56:38,819 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:38,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 132 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:38,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-01-18 04:56:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 745. [2022-01-18 04:56:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.861559139784946) internal successors, (2129), 744 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2129 transitions. [2022-01-18 04:56:38,827 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2129 transitions. Word has length 19 [2022-01-18 04:56:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:38,827 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2129 transitions. [2022-01-18 04:56:38,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2129 transitions. [2022-01-18 04:56:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:38,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:38,828 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:38,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:39,028 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,SelfDestructingSolverStorable238 [2022-01-18 04:56:39,028 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash -513991489, now seen corresponding path program 231 times [2022-01-18 04:56:39,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:39,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926172575] [2022-01-18 04:56:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:39,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:39,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:39,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926172575] [2022-01-18 04:56:39,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926172575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:39,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917858142] [2022-01-18 04:56:39,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:56:39,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:39,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:39,141 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) [2022-01-18 04:56:39,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 04:56:39,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:56:39,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:39,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 04:56:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:39,476 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 89 treesize of output 73 [2022-01-18 04:56:39,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:56:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:39,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:39,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:39,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 04:56:39,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:39,735 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 04:56:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:39,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917858142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:39,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:39,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 04:56:39,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626321538] [2022-01-18 04:56:39,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:39,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:56:39,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:56:39,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:56:39,833 INFO L87 Difference]: Start difference. First operand 745 states and 2129 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:56:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:40,851 INFO L93 Difference]: Finished difference Result 850 states and 2330 transitions. [2022-01-18 04:56:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:56:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:40,852 INFO L225 Difference]: With dead ends: 850 [2022-01-18 04:56:40,852 INFO L226 Difference]: Without dead ends: 850 [2022-01-18 04:56:40,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 04:56:40,852 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:40,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 187 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-18 04:56:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 739. [2022-01-18 04:56:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.8631436314363143) internal successors, (2113), 738 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2113 transitions. [2022-01-18 04:56:40,860 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2113 transitions. Word has length 19 [2022-01-18 04:56:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:40,860 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2113 transitions. [2022-01-18 04:56:40,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:56:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2113 transitions. [2022-01-18 04:56:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:40,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:40,861 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:40,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-18 04:56:41,061 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,SelfDestructingSolverStorable239 [2022-01-18 04:56:41,061 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash 675081335, now seen corresponding path program 232 times [2022-01-18 04:56:41,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:41,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374931110] [2022-01-18 04:56:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:41,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:41,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:41,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374931110] [2022-01-18 04:56:41,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374931110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:41,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094475913] [2022-01-18 04:56:41,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:56:41,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:41,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:41,204 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) [2022-01-18 04:56:41,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 04:56:41,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:56:41,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:41,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:41,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:41,765 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 04:56:41,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2022-01-18 04:56:41,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:56:41,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:41,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 41 [2022-01-18 04:56:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:41,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094475913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:41,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:41,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:56:41,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256227272] [2022-01-18 04:56:41,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:41,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:56:41,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:41,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:56:41,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:41,932 INFO L87 Difference]: Start difference. First operand 739 states and 2113 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:42,440 INFO L93 Difference]: Finished difference Result 835 states and 2317 transitions. [2022-01-18 04:56:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:56:42,440 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:42,441 INFO L225 Difference]: With dead ends: 835 [2022-01-18 04:56:42,441 INFO L226 Difference]: Without dead ends: 835 [2022-01-18 04:56:42,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:56:42,441 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:42,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 108 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-18 04:56:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 745. [2022-01-18 04:56:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.8629032258064515) internal successors, (2130), 744 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2130 transitions. [2022-01-18 04:56:42,449 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2130 transitions. Word has length 19 [2022-01-18 04:56:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:42,449 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2130 transitions. [2022-01-18 04:56:42,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2130 transitions. [2022-01-18 04:56:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:42,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:42,450 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:42,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 04:56:42,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:42,651 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:42,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1690888137, now seen corresponding path program 233 times [2022-01-18 04:56:42,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:42,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858172692] [2022-01-18 04:56:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:42,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:42,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:42,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858172692] [2022-01-18 04:56:42,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858172692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:42,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579511483] [2022-01-18 04:56:42,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:56:42,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:42,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:42,782 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) [2022-01-18 04:56:42,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 04:56:42,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:56:42,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:42,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:43,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:43,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:43,265 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 42 treesize of output 40 [2022-01-18 04:56:43,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:43,270 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 30 treesize of output 28 [2022-01-18 04:56:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:43,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579511483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:43,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:43,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:43,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92915445] [2022-01-18 04:56:43,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:43,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:43,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:43,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:43,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:43,386 INFO L87 Difference]: Start difference. First operand 745 states and 2130 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:43,719 INFO L93 Difference]: Finished difference Result 794 states and 2228 transitions. [2022-01-18 04:56:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:56:43,719 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:43,720 INFO L225 Difference]: With dead ends: 794 [2022-01-18 04:56:43,720 INFO L226 Difference]: Without dead ends: 794 [2022-01-18 04:56:43,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:56:43,720 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:43,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 196 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-01-18 04:56:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 744. [2022-01-18 04:56:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.8627187079407808) internal successors, (2127), 743 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2127 transitions. [2022-01-18 04:56:43,728 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2127 transitions. Word has length 19 [2022-01-18 04:56:43,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:43,728 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2127 transitions. [2022-01-18 04:56:43,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2127 transitions. [2022-01-18 04:56:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:43,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:43,729 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:43,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:43,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:43,929 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:43,930 INFO L85 PathProgramCache]: Analyzing trace with hash 415895983, now seen corresponding path program 234 times [2022-01-18 04:56:43,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:43,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942118633] [2022-01-18 04:56:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:43,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:44,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:44,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942118633] [2022-01-18 04:56:44,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942118633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:44,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320717605] [2022-01-18 04:56:44,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:56:44,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:44,069 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) [2022-01-18 04:56:44,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 04:56:44,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:56:44,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:44,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:44,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:44,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:44,565 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 42 treesize of output 40 [2022-01-18 04:56:44,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:44,570 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:56:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:44,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320717605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:44,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:44,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:44,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15350135] [2022-01-18 04:56:44,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:44,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:44,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:44,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:44,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:44,683 INFO L87 Difference]: Start difference. First operand 744 states and 2127 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:45,242 INFO L93 Difference]: Finished difference Result 815 states and 2274 transitions. [2022-01-18 04:56:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:56:45,242 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:45,243 INFO L225 Difference]: With dead ends: 815 [2022-01-18 04:56:45,244 INFO L226 Difference]: Without dead ends: 815 [2022-01-18 04:56:45,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 04:56:45,244 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:45,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 143 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-01-18 04:56:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 745. [2022-01-18 04:56:45,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.8629032258064515) internal successors, (2130), 744 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2130 transitions. [2022-01-18 04:56:45,251 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2130 transitions. Word has length 19 [2022-01-18 04:56:45,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:45,251 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2130 transitions. [2022-01-18 04:56:45,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:45,251 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2130 transitions. [2022-01-18 04:56:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:45,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:45,252 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:45,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:45,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:45,452 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1732900553, now seen corresponding path program 235 times [2022-01-18 04:56:45,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:45,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70002090] [2022-01-18 04:56:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:45,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:45,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:45,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70002090] [2022-01-18 04:56:45,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70002090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:45,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042672929] [2022-01-18 04:56:45,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:56:45,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:45,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:45,579 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) [2022-01-18 04:56:45,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 04:56:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:45,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:45,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:45,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:56:45,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:56:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:45,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:46,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:46,141 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 41 treesize of output 39 [2022-01-18 04:56:46,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:46,146 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 29 treesize of output 27 [2022-01-18 04:56:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:46,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042672929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:46,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:46,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:46,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862762749] [2022-01-18 04:56:46,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:46,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:46,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:46,248 INFO L87 Difference]: Start difference. First operand 745 states and 2130 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:46,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:47,000 INFO L93 Difference]: Finished difference Result 843 states and 2325 transitions. [2022-01-18 04:56:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:56:47,000 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:47,001 INFO L225 Difference]: With dead ends: 843 [2022-01-18 04:56:47,001 INFO L226 Difference]: Without dead ends: 843 [2022-01-18 04:56:47,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 04:56:47,001 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 112 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:47,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 180 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-18 04:56:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 740. [2022-01-18 04:56:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.8646820027063598) internal successors, (2117), 739 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2117 transitions. [2022-01-18 04:56:47,009 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2117 transitions. Word has length 19 [2022-01-18 04:56:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:47,009 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2117 transitions. [2022-01-18 04:56:47,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:47,009 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2117 transitions. [2022-01-18 04:56:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:47,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:47,010 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:47,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:47,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-01-18 04:56:47,210 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:47,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1217410799, now seen corresponding path program 236 times [2022-01-18 04:56:47,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:47,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016188228] [2022-01-18 04:56:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:47,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:47,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:47,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016188228] [2022-01-18 04:56:47,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016188228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:47,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771795468] [2022-01-18 04:56:47,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:56:47,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:47,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:47,337 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) [2022-01-18 04:56:47,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 04:56:47,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:56:47,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:47,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:47,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:56:47,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:56:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:47,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:47,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:47,855 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 73 treesize of output 67 [2022-01-18 04:56:47,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:47,862 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 57 treesize of output 51 [2022-01-18 04:56:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:48,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771795468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:48,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:48,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:48,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466099623] [2022-01-18 04:56:48,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:48,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:48,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:48,014 INFO L87 Difference]: Start difference. First operand 740 states and 2117 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:48,400 INFO L93 Difference]: Finished difference Result 807 states and 2240 transitions. [2022-01-18 04:56:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:56:48,400 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:48,401 INFO L225 Difference]: With dead ends: 807 [2022-01-18 04:56:48,401 INFO L226 Difference]: Without dead ends: 805 [2022-01-18 04:56:48,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:56:48,402 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:48,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 218 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-18 04:56:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 740. [2022-01-18 04:56:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.8687415426251692) internal successors, (2120), 739 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:48,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2120 transitions. [2022-01-18 04:56:48,409 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2120 transitions. Word has length 19 [2022-01-18 04:56:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:48,409 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2120 transitions. [2022-01-18 04:56:48,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2120 transitions. [2022-01-18 04:56:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:48,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:48,410 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:48,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:48,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-01-18 04:56:48,610 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:48,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:48,611 INFO L85 PathProgramCache]: Analyzing trace with hash -459544265, now seen corresponding path program 237 times [2022-01-18 04:56:48,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:48,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351287323] [2022-01-18 04:56:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:48,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:48,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:48,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351287323] [2022-01-18 04:56:48,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351287323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:48,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726435956] [2022-01-18 04:56:48,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:56:48,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:48,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:48,737 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) [2022-01-18 04:56:48,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 04:56:48,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:56:48,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:48,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 04:56:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:49,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:49,248 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 64 treesize of output 60 [2022-01-18 04:56:49,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:49,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2022-01-18 04:56:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:49,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:50,027 INFO L353 Elim1Store]: treesize reduction 5, result has 82.8 percent of original size [2022-01-18 04:56:50,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 124 [2022-01-18 04:56:50,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:50,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 97 [2022-01-18 04:56:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:50,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726435956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:50,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:50,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 30 [2022-01-18 04:56:50,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826131383] [2022-01-18 04:56:50,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:50,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 04:56:50,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 04:56:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:56:50,507 INFO L87 Difference]: Start difference. First operand 740 states and 2120 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:51,292 INFO L93 Difference]: Finished difference Result 802 states and 2223 transitions. [2022-01-18 04:56:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:56:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:51,294 INFO L225 Difference]: With dead ends: 802 [2022-01-18 04:56:51,294 INFO L226 Difference]: Without dead ends: 795 [2022-01-18 04:56:51,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 04:56:51,294 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:51,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 198 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 676 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-01-18 04:56:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-18 04:56:51,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 737. [2022-01-18 04:56:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.864130434782609) internal successors, (2108), 736 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2108 transitions. [2022-01-18 04:56:51,301 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2108 transitions. Word has length 19 [2022-01-18 04:56:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:51,301 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2108 transitions. [2022-01-18 04:56:51,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2108 transitions. [2022-01-18 04:56:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:51,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:51,302 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:51,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:51,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-01-18 04:56:51,505 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:51,505 INFO L85 PathProgramCache]: Analyzing trace with hash -454707657, now seen corresponding path program 238 times [2022-01-18 04:56:51,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:51,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203082792] [2022-01-18 04:56:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:51,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:51,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:51,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203082792] [2022-01-18 04:56:51,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203082792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:51,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086977290] [2022-01-18 04:56:51,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:56:51,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:51,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:51,651 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) [2022-01-18 04:56:51,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 04:56:51,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:56:51,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:52,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:52,327 INFO L353 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-01-18 04:56:52,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 51 [2022-01-18 04:56:52,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:52,333 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 33 treesize of output 29 [2022-01-18 04:56:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:52,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086977290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:52,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:52,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:52,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286362168] [2022-01-18 04:56:52,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:52,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:52,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:52,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:52,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:52,383 INFO L87 Difference]: Start difference. First operand 737 states and 2108 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:52,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:52,726 INFO L93 Difference]: Finished difference Result 825 states and 2282 transitions. [2022-01-18 04:56:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:56:52,726 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:52,727 INFO L225 Difference]: With dead ends: 825 [2022-01-18 04:56:52,727 INFO L226 Difference]: Without dead ends: 825 [2022-01-18 04:56:52,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:56:52,728 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:52,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 198 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-18 04:56:52,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 741. [2022-01-18 04:56:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 2.868918918918919) internal successors, (2123), 740 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2123 transitions. [2022-01-18 04:56:52,735 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2123 transitions. Word has length 19 [2022-01-18 04:56:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:52,735 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2123 transitions. [2022-01-18 04:56:52,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2123 transitions. [2022-01-18 04:56:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:52,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:52,736 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:52,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:52,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-01-18 04:56:52,937 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:52,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1691463103, now seen corresponding path program 239 times [2022-01-18 04:56:52,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:52,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262368101] [2022-01-18 04:56:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:52,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:53,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262368101] [2022-01-18 04:56:53,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262368101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652112707] [2022-01-18 04:56:53,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:56:53,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:53,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:53,105 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) [2022-01-18 04:56:53,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 04:56:53,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:56:53,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:53,405 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 87 treesize of output 71 [2022-01-18 04:56:53,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:56:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:53,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:53,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:53,632 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 34 treesize of output 34 [2022-01-18 04:56:53,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:53,636 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 26 treesize of output 26 [2022-01-18 04:56:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:53,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652112707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:53,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:53,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:53,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117853893] [2022-01-18 04:56:53,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:53,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:53,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:53,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:53,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:53,760 INFO L87 Difference]: Start difference. First operand 741 states and 2123 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:54,138 INFO L93 Difference]: Finished difference Result 876 states and 2372 transitions. [2022-01-18 04:56:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:56:54,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:54,140 INFO L225 Difference]: With dead ends: 876 [2022-01-18 04:56:54,140 INFO L226 Difference]: Without dead ends: 870 [2022-01-18 04:56:54,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:56:54,140 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 115 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:54,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 219 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-18 04:56:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 742. [2022-01-18 04:56:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.8677462887989202) internal successors, (2125), 741 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2125 transitions. [2022-01-18 04:56:54,148 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2125 transitions. Word has length 19 [2022-01-18 04:56:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:54,148 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2125 transitions. [2022-01-18 04:56:54,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2125 transitions. [2022-01-18 04:56:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:54,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:54,149 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:54,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-01-18 04:56:54,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:54,350 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash 331346363, now seen corresponding path program 240 times [2022-01-18 04:56:54,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:54,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173786918] [2022-01-18 04:56:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:54,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:54,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:54,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173786918] [2022-01-18 04:56:54,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173786918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:54,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959599162] [2022-01-18 04:56:54,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:56:54,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:54,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:54,502 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) [2022-01-18 04:56:54,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 04:56:54,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:56:54,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:54,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:56:54,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:54,829 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 98 treesize of output 82 [2022-01-18 04:56:54,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:56:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:54,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:54,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:54,985 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 65 treesize of output 61 [2022-01-18 04:56:54,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:54,996 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 53 treesize of output 49 [2022-01-18 04:56:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:55,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959599162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:55,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:55,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:55,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848650830] [2022-01-18 04:56:55,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:55,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:55,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:55,193 INFO L87 Difference]: Start difference. First operand 742 states and 2125 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:55,461 INFO L93 Difference]: Finished difference Result 825 states and 2271 transitions. [2022-01-18 04:56:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:56:55,461 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:55,462 INFO L225 Difference]: With dead ends: 825 [2022-01-18 04:56:55,462 INFO L226 Difference]: Without dead ends: 825 [2022-01-18 04:56:55,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:56:55,462 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:55,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 196 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-18 04:56:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 740. [2022-01-18 04:56:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.8700947225981057) internal successors, (2121), 739 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2121 transitions. [2022-01-18 04:56:55,470 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2121 transitions. Word has length 19 [2022-01-18 04:56:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:55,470 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2121 transitions. [2022-01-18 04:56:55,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2121 transitions. [2022-01-18 04:56:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:55,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:55,471 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:55,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-18 04:56:55,671 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,SelfDestructingSolverStorable248 [2022-01-18 04:56:55,671 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:55,672 INFO L85 PathProgramCache]: Analyzing trace with hash -496720073, now seen corresponding path program 241 times [2022-01-18 04:56:55,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:55,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565797286] [2022-01-18 04:56:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:55,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:55,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:55,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565797286] [2022-01-18 04:56:55,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565797286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:55,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277544346] [2022-01-18 04:56:55,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:56:55,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:55,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:55,837 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) [2022-01-18 04:56:55,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 04:56:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:55,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:55,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:56,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:56:56,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:56:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:56,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:56,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:56,313 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 63 treesize of output 59 [2022-01-18 04:56:56,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:56,319 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 51 treesize of output 47 [2022-01-18 04:56:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:56,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277544346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:56,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:56,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:56,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775853939] [2022-01-18 04:56:56,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:56,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:56,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:56,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:56,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:56,485 INFO L87 Difference]: Start difference. First operand 740 states and 2121 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:57,015 INFO L93 Difference]: Finished difference Result 831 states and 2280 transitions. [2022-01-18 04:56:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:56:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:57,017 INFO L225 Difference]: With dead ends: 831 [2022-01-18 04:56:57,017 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 04:56:57,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:56:57,017 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:57,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 264 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:56:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 04:56:57,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 742. [2022-01-18 04:56:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.871794871794872) internal successors, (2128), 741 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2128 transitions. [2022-01-18 04:56:57,025 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2128 transitions. Word has length 19 [2022-01-18 04:56:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:57,025 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2128 transitions. [2022-01-18 04:56:57,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2128 transitions. [2022-01-18 04:56:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:57,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:57,026 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:57,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-01-18 04:56:57,226 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,SelfDestructingSolverStorable249 [2022-01-18 04:56:57,226 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:57,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1841376017, now seen corresponding path program 242 times [2022-01-18 04:56:57,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:57,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584312520] [2022-01-18 04:56:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:57,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:57,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:57,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584312520] [2022-01-18 04:56:57,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584312520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:57,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110009005] [2022-01-18 04:56:57,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:56:57,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:57,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:57,372 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) [2022-01-18 04:56:57,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 04:56:57,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:56:57,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:57,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:56:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:57,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:56:57,665 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 71 treesize of output 55 [2022-01-18 04:56:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:57,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:57,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:57,841 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 34 treesize of output 34 [2022-01-18 04:56:57,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:56:57,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 04:56:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:57,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110009005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:57,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:57,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:57,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036391731] [2022-01-18 04:56:57,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:57,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:57,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:57,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:57,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:57,965 INFO L87 Difference]: Start difference. First operand 742 states and 2128 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:56:58,718 INFO L93 Difference]: Finished difference Result 888 states and 2430 transitions. [2022-01-18 04:56:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:56:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:56:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:56:58,720 INFO L225 Difference]: With dead ends: 888 [2022-01-18 04:56:58,720 INFO L226 Difference]: Without dead ends: 886 [2022-01-18 04:56:58,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:56:58,720 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:56:58,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 177 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:56:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-18 04:56:58,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 748. [2022-01-18 04:56:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.8768406961178044) internal successors, (2149), 747 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2149 transitions. [2022-01-18 04:56:58,728 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2149 transitions. Word has length 19 [2022-01-18 04:56:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:56:58,728 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2149 transitions. [2022-01-18 04:56:58,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:56:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2149 transitions. [2022-01-18 04:56:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:56:58,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:56:58,729 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:56:58,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-18 04:56:58,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:58,930 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:56:58,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:56:58,930 INFO L85 PathProgramCache]: Analyzing trace with hash 304794743, now seen corresponding path program 243 times [2022-01-18 04:56:58,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:56:58,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717200125] [2022-01-18 04:56:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:56:58,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:56:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:56:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:59,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:56:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717200125] [2022-01-18 04:56:59,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717200125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:56:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659877777] [2022-01-18 04:56:59,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:56:59,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:56:59,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:56:59,075 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) [2022-01-18 04:56:59,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 04:56:59,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:56:59,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:56:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 04:56:59,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:56:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:59,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:56:59,559 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:56:59,559 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 34 treesize of output 29 [2022-01-18 04:56:59,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2022-01-18 04:56:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:56:59,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659877777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:56:59,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:56:59,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:56:59,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516128266] [2022-01-18 04:56:59,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:56:59,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:56:59,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:56:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:56:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:56:59,676 INFO L87 Difference]: Start difference. First operand 748 states and 2149 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:00,750 INFO L93 Difference]: Finished difference Result 1044 states and 2831 transitions. [2022-01-18 04:57:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 04:57:00,751 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:00,752 INFO L225 Difference]: With dead ends: 1044 [2022-01-18 04:57:00,752 INFO L226 Difference]: Without dead ends: 1044 [2022-01-18 04:57:00,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 04:57:00,753 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 184 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:00,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 222 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-18 04:57:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 803. [2022-01-18 04:57:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 2.910224438902743) internal successors, (2334), 802 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2334 transitions. [2022-01-18 04:57:00,762 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2334 transitions. Word has length 19 [2022-01-18 04:57:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:00,763 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 2334 transitions. [2022-01-18 04:57:00,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:00,763 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2334 transitions. [2022-01-18 04:57:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:00,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:00,764 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:00,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-01-18 04:57:00,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:00,964 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:00,964 INFO L85 PathProgramCache]: Analyzing trace with hash -955577737, now seen corresponding path program 244 times [2022-01-18 04:57:00,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:00,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347454105] [2022-01-18 04:57:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:00,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:01,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:01,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347454105] [2022-01-18 04:57:01,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347454105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:01,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125300154] [2022-01-18 04:57:01,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:57:01,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:01,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:01,097 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) [2022-01-18 04:57:01,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 04:57:01,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:57:01,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:01,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:01,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:01,419 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 89 treesize of output 73 [2022-01-18 04:57:01,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:57:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:01,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:01,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:01,632 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 41 treesize of output 39 [2022-01-18 04:57:01,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:01,637 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 29 treesize of output 27 [2022-01-18 04:57:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:01,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125300154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:01,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:01,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:01,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013887868] [2022-01-18 04:57:01,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:01,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:01,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:01,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:01,751 INFO L87 Difference]: Start difference. First operand 803 states and 2334 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:02,513 INFO L93 Difference]: Finished difference Result 980 states and 2745 transitions. [2022-01-18 04:57:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:57:02,513 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:02,514 INFO L225 Difference]: With dead ends: 980 [2022-01-18 04:57:02,514 INFO L226 Difference]: Without dead ends: 978 [2022-01-18 04:57:02,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:57:02,514 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 154 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:02,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 117 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-18 04:57:02,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 827. [2022-01-18 04:57:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.9116222760290555) internal successors, (2405), 826 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2405 transitions. [2022-01-18 04:57:02,524 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2405 transitions. Word has length 19 [2022-01-18 04:57:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:02,524 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 2405 transitions. [2022-01-18 04:57:02,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2405 transitions. [2022-01-18 04:57:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:02,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:02,525 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:02,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-01-18 04:57:02,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:02,725 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:02,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:02,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1190593023, now seen corresponding path program 245 times [2022-01-18 04:57:02,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:02,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447718156] [2022-01-18 04:57:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:02,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:02,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:02,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447718156] [2022-01-18 04:57:02,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447718156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:02,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356707291] [2022-01-18 04:57:02,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:57:02,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:02,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:02,859 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) [2022-01-18 04:57:02,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 04:57:02,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:57:02,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:02,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:03,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:03,458 INFO L353 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2022-01-18 04:57:03,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 50 [2022-01-18 04:57:03,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:03,463 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 30 treesize of output 28 [2022-01-18 04:57:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:03,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356707291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:03,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:03,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:03,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974351292] [2022-01-18 04:57:03,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:03,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:03,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:03,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:03,559 INFO L87 Difference]: Start difference. First operand 827 states and 2405 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:04,327 INFO L93 Difference]: Finished difference Result 918 states and 2593 transitions. [2022-01-18 04:57:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:57:04,327 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:04,328 INFO L225 Difference]: With dead ends: 918 [2022-01-18 04:57:04,328 INFO L226 Difference]: Without dead ends: 918 [2022-01-18 04:57:04,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:57:04,328 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 71 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:04,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 102 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-01-18 04:57:04,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 818. [2022-01-18 04:57:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 2.909424724602203) internal successors, (2377), 817 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2377 transitions. [2022-01-18 04:57:04,337 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2377 transitions. Word has length 19 [2022-01-18 04:57:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:04,337 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 2377 transitions. [2022-01-18 04:57:04,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2377 transitions. [2022-01-18 04:57:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:04,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:04,338 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:04,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-01-18 04:57:04,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:04,539 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash -997590153, now seen corresponding path program 246 times [2022-01-18 04:57:04,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:04,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761123866] [2022-01-18 04:57:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:04,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:04,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:04,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761123866] [2022-01-18 04:57:04,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761123866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:04,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295519367] [2022-01-18 04:57:04,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:57:04,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:04,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:04,672 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) [2022-01-18 04:57:04,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 04:57:04,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:57:04,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:04,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:05,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:05,126 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 41 treesize of output 39 [2022-01-18 04:57:05,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:05,131 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 29 treesize of output 27 [2022-01-18 04:57:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:05,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295519367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:05,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:05,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:05,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813869958] [2022-01-18 04:57:05,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:05,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:05,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:05,243 INFO L87 Difference]: Start difference. First operand 818 states and 2377 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:05,577 INFO L93 Difference]: Finished difference Result 893 states and 2533 transitions. [2022-01-18 04:57:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:57:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:05,578 INFO L225 Difference]: With dead ends: 893 [2022-01-18 04:57:05,578 INFO L226 Difference]: Without dead ends: 893 [2022-01-18 04:57:05,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:57:05,578 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:05,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 120 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-18 04:57:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 808. [2022-01-18 04:57:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.907063197026022) internal successors, (2346), 807 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2346 transitions. [2022-01-18 04:57:05,587 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2346 transitions. Word has length 19 [2022-01-18 04:57:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:05,587 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 2346 transitions. [2022-01-18 04:57:05,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2346 transitions. [2022-01-18 04:57:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:05,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:05,588 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:05,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-18 04:57:05,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:05,792 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 734365167, now seen corresponding path program 247 times [2022-01-18 04:57:05,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:05,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13341543] [2022-01-18 04:57:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:05,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:05,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:05,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13341543] [2022-01-18 04:57:05,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13341543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:05,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980683427] [2022-01-18 04:57:05,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:57:05,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:05,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:05,908 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) [2022-01-18 04:57:05,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 04:57:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:06,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:57:06,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:57:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:06,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:06,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:06,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 40 [2022-01-18 04:57:06,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:06,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:57:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:06,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980683427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:06,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:06,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:06,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024942759] [2022-01-18 04:57:06,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:06,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:06,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:06,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:06,615 INFO L87 Difference]: Start difference. First operand 808 states and 2346 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:07,691 INFO L93 Difference]: Finished difference Result 964 states and 2688 transitions. [2022-01-18 04:57:07,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:57:07,692 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:07,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:07,693 INFO L225 Difference]: With dead ends: 964 [2022-01-18 04:57:07,693 INFO L226 Difference]: Without dead ends: 962 [2022-01-18 04:57:07,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=324, Invalid=2028, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 04:57:07,694 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 195 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:07,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 135 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-18 04:57:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 822. [2022-01-18 04:57:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 2.907429963459196) internal successors, (2387), 821 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2387 transitions. [2022-01-18 04:57:07,702 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2387 transitions. Word has length 19 [2022-01-18 04:57:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:07,703 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 2387 transitions. [2022-01-18 04:57:07,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2387 transitions. [2022-01-18 04:57:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:07,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:07,704 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:07,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-01-18 04:57:07,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:07,906 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:07,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:07,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1414431369, now seen corresponding path program 248 times [2022-01-18 04:57:07,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:07,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052578862] [2022-01-18 04:57:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:07,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:08,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:08,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052578862] [2022-01-18 04:57:08,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052578862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:08,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587870752] [2022-01-18 04:57:08,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:08,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:08,025 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) [2022-01-18 04:57:08,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 04:57:08,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:08,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:08,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:08,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:08,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:08,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:08,575 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 43 treesize of output 41 [2022-01-18 04:57:08,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:08,580 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 31 treesize of output 29 [2022-01-18 04:57:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:08,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587870752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:08,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:08,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:08,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438095527] [2022-01-18 04:57:08,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:08,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:08,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:08,669 INFO L87 Difference]: Start difference. First operand 822 states and 2387 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:09,709 INFO L93 Difference]: Finished difference Result 952 states and 2661 transitions. [2022-01-18 04:57:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:57:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:09,711 INFO L225 Difference]: With dead ends: 952 [2022-01-18 04:57:09,711 INFO L226 Difference]: Without dead ends: 952 [2022-01-18 04:57:09,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 04:57:09,711 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 119 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:09,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 136 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-18 04:57:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 819. [2022-01-18 04:57:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.9070904645476774) internal successors, (2378), 818 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2378 transitions. [2022-01-18 04:57:09,720 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2378 transitions. Word has length 19 [2022-01-18 04:57:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:09,720 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 2378 transitions. [2022-01-18 04:57:09,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2378 transitions. [2022-01-18 04:57:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:09,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:09,721 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:09,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-01-18 04:57:09,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-18 04:57:09,922 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash 692352751, now seen corresponding path program 249 times [2022-01-18 04:57:09,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:09,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98926938] [2022-01-18 04:57:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:09,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:10,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:10,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98926938] [2022-01-18 04:57:10,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98926938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:10,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831738185] [2022-01-18 04:57:10,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:57:10,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:10,040 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) [2022-01-18 04:57:10,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 04:57:10,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:57:10,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:10,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:10,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:10,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:10,585 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:57:10,585 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-01-18 04:57:10,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 11 [2022-01-18 04:57:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:10,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831738185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:10,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:10,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:10,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693396476] [2022-01-18 04:57:10,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:10,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:10,657 INFO L87 Difference]: Start difference. First operand 819 states and 2378 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:14,246 INFO L93 Difference]: Finished difference Result 1307 states and 3494 transitions. [2022-01-18 04:57:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 04:57:14,246 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:14,248 INFO L225 Difference]: With dead ends: 1307 [2022-01-18 04:57:14,248 INFO L226 Difference]: Without dead ends: 1307 [2022-01-18 04:57:14,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2809 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1479, Invalid=7451, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 04:57:14,249 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 238 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:14,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 312 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:57:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-01-18 04:57:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 902. [2022-01-18 04:57:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.942286348501665) internal successors, (2651), 901 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2651 transitions. [2022-01-18 04:57:14,259 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2651 transitions. Word has length 19 [2022-01-18 04:57:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:14,260 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 2651 transitions. [2022-01-18 04:57:14,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2651 transitions. [2022-01-18 04:57:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:14,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:14,261 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:14,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-01-18 04:57:14,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-01-18 04:57:14,461 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1578151031, now seen corresponding path program 250 times [2022-01-18 04:57:14,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504822752] [2022-01-18 04:57:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:14,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:14,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:14,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504822752] [2022-01-18 04:57:14,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504822752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:14,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816810298] [2022-01-18 04:57:14,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:57:14,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:14,572 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) [2022-01-18 04:57:14,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 04:57:14,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:57:14,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:14,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:14,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:15,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:15,073 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 42 treesize of output 40 [2022-01-18 04:57:15,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:15,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:57:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:15,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816810298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:15,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:15,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:15,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746372971] [2022-01-18 04:57:15,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:15,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:15,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:15,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:15,171 INFO L87 Difference]: Start difference. First operand 902 states and 2651 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:15,523 INFO L93 Difference]: Finished difference Result 1032 states and 2944 transitions. [2022-01-18 04:57:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:57:15,523 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:15,524 INFO L225 Difference]: With dead ends: 1032 [2022-01-18 04:57:15,524 INFO L226 Difference]: Without dead ends: 1032 [2022-01-18 04:57:15,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 04:57:15,524 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 67 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:15,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 120 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-18 04:57:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 896. [2022-01-18 04:57:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.940782122905028) internal successors, (2632), 895 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2632 transitions. [2022-01-18 04:57:15,534 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2632 transitions. Word has length 19 [2022-01-18 04:57:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2632 transitions. [2022-01-18 04:57:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2632 transitions. [2022-01-18 04:57:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:15,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:15,535 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:15,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-01-18 04:57:15,735 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,SelfDestructingSolverStorable258 [2022-01-18 04:57:15,736 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:15,736 INFO L85 PathProgramCache]: Analyzing trace with hash -207757461, now seen corresponding path program 251 times [2022-01-18 04:57:15,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:15,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570048569] [2022-01-18 04:57:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:15,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:15,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570048569] [2022-01-18 04:57:15,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570048569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590873910] [2022-01-18 04:57:15,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:57:15,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:15,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:15,836 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) [2022-01-18 04:57:15,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 04:57:15,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:57:15,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:15,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:15,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:16,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:16,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:16,303 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 42 treesize of output 40 [2022-01-18 04:57:16,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:16,308 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 30 treesize of output 28 [2022-01-18 04:57:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:16,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590873910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:16,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:16,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:16,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133897681] [2022-01-18 04:57:16,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:16,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:16,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:16,389 INFO L87 Difference]: Start difference. First operand 896 states and 2632 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:16,807 INFO L93 Difference]: Finished difference Result 983 states and 2795 transitions. [2022-01-18 04:57:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:57:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:16,808 INFO L225 Difference]: With dead ends: 983 [2022-01-18 04:57:16,808 INFO L226 Difference]: Without dead ends: 983 [2022-01-18 04:57:16,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:57:16,809 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 117 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:16,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 261 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-01-18 04:57:16,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 894. [2022-01-18 04:57:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 2.9406494960806273) internal successors, (2626), 893 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2626 transitions. [2022-01-18 04:57:16,819 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2626 transitions. Word has length 19 [2022-01-18 04:57:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:16,819 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 2626 transitions. [2022-01-18 04:57:16,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2626 transitions. [2022-01-18 04:57:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:16,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:16,821 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:16,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:17,021 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,SelfDestructingSolverStorable259 [2022-01-18 04:57:17,021 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 678040819, now seen corresponding path program 252 times [2022-01-18 04:57:17,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466407361] [2022-01-18 04:57:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:17,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:17,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:17,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466407361] [2022-01-18 04:57:17,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466407361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:17,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572012089] [2022-01-18 04:57:17,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:57:17,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:17,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:17,131 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) [2022-01-18 04:57:17,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 04:57:17,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:57:17,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:17,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:17,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:17,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:17,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:17,621 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 41 treesize of output 39 [2022-01-18 04:57:17,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:17,626 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 29 treesize of output 27 [2022-01-18 04:57:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:17,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572012089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:17,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:17,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:17,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077133324] [2022-01-18 04:57:17,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:17,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:17,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:17,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:17,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:17,716 INFO L87 Difference]: Start difference. First operand 894 states and 2626 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:18,361 INFO L93 Difference]: Finished difference Result 994 states and 2817 transitions. [2022-01-18 04:57:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:57:18,362 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:18,363 INFO L225 Difference]: With dead ends: 994 [2022-01-18 04:57:18,363 INFO L226 Difference]: Without dead ends: 994 [2022-01-18 04:57:18,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 04:57:18,363 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 116 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:18,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 197 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-01-18 04:57:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 893. [2022-01-18 04:57:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.9394618834080717) internal successors, (2622), 892 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2622 transitions. [2022-01-18 04:57:18,373 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2622 transitions. Word has length 19 [2022-01-18 04:57:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:18,373 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 2622 transitions. [2022-01-18 04:57:18,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2622 transitions. [2022-01-18 04:57:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:18,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:18,374 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:18,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:18,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:18,575 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1510142357, now seen corresponding path program 253 times [2022-01-18 04:57:18,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:18,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536548731] [2022-01-18 04:57:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:18,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:18,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536548731] [2022-01-18 04:57:18,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536548731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882836790] [2022-01-18 04:57:18,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:57:18,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:18,688 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) [2022-01-18 04:57:18,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 04:57:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:19,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:19,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:19,206 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 42 treesize of output 40 [2022-01-18 04:57:19,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:19,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:57:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:19,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882836790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:19,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:19,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:19,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167227390] [2022-01-18 04:57:19,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:19,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:19,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:19,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:19,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:19,294 INFO L87 Difference]: Start difference. First operand 893 states and 2622 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:20,307 INFO L93 Difference]: Finished difference Result 1009 states and 2847 transitions. [2022-01-18 04:57:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 04:57:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:20,308 INFO L225 Difference]: With dead ends: 1009 [2022-01-18 04:57:20,308 INFO L226 Difference]: Without dead ends: 1009 [2022-01-18 04:57:20,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=367, Invalid=2183, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 04:57:20,309 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 138 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:20,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 232 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-01-18 04:57:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 890. [2022-01-18 04:57:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.9392575928009) internal successors, (2613), 889 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2613 transitions. [2022-01-18 04:57:20,318 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2613 transitions. Word has length 19 [2022-01-18 04:57:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:20,318 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2613 transitions. [2022-01-18 04:57:20,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2613 transitions. [2022-01-18 04:57:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:20,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:20,319 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:20,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-01-18 04:57:20,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:20,520 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash -724088337, now seen corresponding path program 254 times [2022-01-18 04:57:20,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:20,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105178890] [2022-01-18 04:57:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:20,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:20,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:20,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105178890] [2022-01-18 04:57:20,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105178890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:20,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222134587] [2022-01-18 04:57:20,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:20,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:20,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:20,637 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) [2022-01-18 04:57:20,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 04:57:20,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:20,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:20,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:20,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:21,005 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 98 treesize of output 82 [2022-01-18 04:57:21,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:57:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:21,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:21,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:21,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-01-18 04:57:21,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:21,221 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 57 treesize of output 51 [2022-01-18 04:57:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:21,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222134587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:21,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:21,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:21,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882746630] [2022-01-18 04:57:21,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:21,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:21,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:21,355 INFO L87 Difference]: Start difference. First operand 890 states and 2613 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:21,941 INFO L93 Difference]: Finished difference Result 967 states and 2731 transitions. [2022-01-18 04:57:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:57:21,941 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:21,942 INFO L225 Difference]: With dead ends: 967 [2022-01-18 04:57:21,942 INFO L226 Difference]: Without dead ends: 959 [2022-01-18 04:57:21,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:57:21,943 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:21,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 280 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-01-18 04:57:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 881. [2022-01-18 04:57:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.9352272727272726) internal successors, (2583), 880 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2583 transitions. [2022-01-18 04:57:21,952 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2583 transitions. Word has length 19 [2022-01-18 04:57:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:21,952 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 2583 transitions. [2022-01-18 04:57:21,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2583 transitions. [2022-01-18 04:57:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:21,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:21,953 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:21,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:22,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:22,154 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:22,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1984456785, now seen corresponding path program 255 times [2022-01-18 04:57:22,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:22,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882093069] [2022-01-18 04:57:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:22,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:22,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:22,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882093069] [2022-01-18 04:57:22,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882093069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:22,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031755650] [2022-01-18 04:57:22,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:57:22,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:22,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:22,282 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) [2022-01-18 04:57:22,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 04:57:22,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:57:22,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:22,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:22,597 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 87 treesize of output 71 [2022-01-18 04:57:22,599 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 71 treesize of output 55 [2022-01-18 04:57:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:22,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:22,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:22,809 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 42 treesize of output 40 [2022-01-18 04:57:22,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:22,814 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 30 treesize of output 28 [2022-01-18 04:57:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:22,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031755650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:22,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:22,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:22,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106220323] [2022-01-18 04:57:22,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:22,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:22,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:22,925 INFO L87 Difference]: Start difference. First operand 881 states and 2583 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:23,718 INFO L93 Difference]: Finished difference Result 1004 states and 2824 transitions. [2022-01-18 04:57:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:57:23,718 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:23,720 INFO L225 Difference]: With dead ends: 1004 [2022-01-18 04:57:23,720 INFO L226 Difference]: Without dead ends: 1001 [2022-01-18 04:57:23,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:57:23,720 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:23,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 196 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-01-18 04:57:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 885. [2022-01-18 04:57:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.9377828054298645) internal successors, (2597), 884 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2597 transitions. [2022-01-18 04:57:23,729 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2597 transitions. Word has length 19 [2022-01-18 04:57:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:23,730 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 2597 transitions. [2022-01-18 04:57:23,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2597 transitions. [2022-01-18 04:57:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:23,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:23,731 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:23,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-01-18 04:57:23,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:23,931 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1065598827, now seen corresponding path program 256 times [2022-01-18 04:57:23,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:23,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160019751] [2022-01-18 04:57:23,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:23,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:24,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:24,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160019751] [2022-01-18 04:57:24,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160019751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:24,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162986284] [2022-01-18 04:57:24,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:57:24,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:24,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:24,079 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) [2022-01-18 04:57:24,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 04:57:24,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:57:24,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:24,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:24,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:24,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:24,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-01-18 04:57:24,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:24,507 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 26 treesize of output 26 [2022-01-18 04:57:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:24,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162986284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:24,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:24,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:24,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995420407] [2022-01-18 04:57:24,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:24,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:24,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:24,620 INFO L87 Difference]: Start difference. First operand 885 states and 2597 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:25,202 INFO L93 Difference]: Finished difference Result 1027 states and 2872 transitions. [2022-01-18 04:57:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:57:25,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:25,204 INFO L225 Difference]: With dead ends: 1027 [2022-01-18 04:57:25,204 INFO L226 Difference]: Without dead ends: 1027 [2022-01-18 04:57:25,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:57:25,205 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 93 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:25,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 191 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-01-18 04:57:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 888. [2022-01-18 04:57:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.9334836527621193) internal successors, (2602), 887 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2602 transitions. [2022-01-18 04:57:25,215 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2602 transitions. Word has length 19 [2022-01-18 04:57:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:25,215 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2602 transitions. [2022-01-18 04:57:25,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2602 transitions. [2022-01-18 04:57:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:25,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:25,216 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:25,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:25,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:25,418 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:25,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:25,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1851652847, now seen corresponding path program 257 times [2022-01-18 04:57:25,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:25,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703729132] [2022-01-18 04:57:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:25,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:25,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:25,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703729132] [2022-01-18 04:57:25,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703729132] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:25,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162075701] [2022-01-18 04:57:25,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:57:25,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:25,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:25,562 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) [2022-01-18 04:57:25,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 04:57:25,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:57:25,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:25,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:57:25,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:57:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:25,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:26,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:26,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2022-01-18 04:57:26,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:26,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2022-01-18 04:57:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162075701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:26,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:26,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:26,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11039888] [2022-01-18 04:57:26,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:26,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:26,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:26,199 INFO L87 Difference]: Start difference. First operand 888 states and 2602 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:26,736 INFO L93 Difference]: Finished difference Result 954 states and 2711 transitions. [2022-01-18 04:57:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:57:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:26,737 INFO L225 Difference]: With dead ends: 954 [2022-01-18 04:57:26,737 INFO L226 Difference]: Without dead ends: 948 [2022-01-18 04:57:26,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:57:26,738 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:26,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 162 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-01-18 04:57:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 889. [2022-01-18 04:57:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.9268018018018016) internal successors, (2599), 888 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2599 transitions. [2022-01-18 04:57:26,747 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2599 transitions. Word has length 19 [2022-01-18 04:57:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:26,747 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2599 transitions. [2022-01-18 04:57:26,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2599 transitions. [2022-01-18 04:57:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:26,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:26,748 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:26,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:26,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-01-18 04:57:26,949 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash -336530329, now seen corresponding path program 258 times [2022-01-18 04:57:26,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:26,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677677564] [2022-01-18 04:57:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:26,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:27,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:27,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677677564] [2022-01-18 04:57:27,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677677564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:27,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135944970] [2022-01-18 04:57:27,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:57:27,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:27,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:27,087 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) [2022-01-18 04:57:27,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 04:57:27,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:57:27,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:27,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:27,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:57:27,384 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 71 treesize of output 55 [2022-01-18 04:57:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:27,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:27,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:27,575 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 35 treesize of output 35 [2022-01-18 04:57:27,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:27,580 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 27 treesize of output 27 [2022-01-18 04:57:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:27,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135944970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:27,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:27,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:27,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157076042] [2022-01-18 04:57:27,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:27,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:27,699 INFO L87 Difference]: Start difference. First operand 889 states and 2599 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:28,004 INFO L93 Difference]: Finished difference Result 1002 states and 2833 transitions. [2022-01-18 04:57:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:57:28,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:28,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:28,006 INFO L225 Difference]: With dead ends: 1002 [2022-01-18 04:57:28,006 INFO L226 Difference]: Without dead ends: 1000 [2022-01-18 04:57:28,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:57:28,006 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 123 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:28,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 146 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-01-18 04:57:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 886. [2022-01-18 04:57:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.927683615819209) internal successors, (2591), 885 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:28,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2591 transitions. [2022-01-18 04:57:28,016 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2591 transitions. Word has length 19 [2022-01-18 04:57:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:28,016 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 2591 transitions. [2022-01-18 04:57:28,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:28,016 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2591 transitions. [2022-01-18 04:57:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:28,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:28,017 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:28,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:28,217 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,SelfDestructingSolverStorable266 [2022-01-18 04:57:28,217 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1809640431, now seen corresponding path program 259 times [2022-01-18 04:57:28,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:28,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299796562] [2022-01-18 04:57:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:28,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:28,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299796562] [2022-01-18 04:57:28,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299796562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234709499] [2022-01-18 04:57:28,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:57:28,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:28,367 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) [2022-01-18 04:57:28,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 04:57:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:28,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:28,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:28,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-01-18 04:57:28,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:28,824 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 26 treesize of output 26 [2022-01-18 04:57:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:28,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234709499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:28,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:28,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:28,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796386748] [2022-01-18 04:57:28,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:28,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:28,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:28,944 INFO L87 Difference]: Start difference. First operand 886 states and 2591 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:29,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:29,276 INFO L93 Difference]: Finished difference Result 956 states and 2728 transitions. [2022-01-18 04:57:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:57:29,277 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:29,278 INFO L225 Difference]: With dead ends: 956 [2022-01-18 04:57:29,278 INFO L226 Difference]: Without dead ends: 956 [2022-01-18 04:57:29,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:57:29,278 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:29,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 167 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-01-18 04:57:29,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 885. [2022-01-18 04:57:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.928733031674208) internal successors, (2589), 884 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2589 transitions. [2022-01-18 04:57:29,287 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2589 transitions. Word has length 19 [2022-01-18 04:57:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:29,287 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 2589 transitions. [2022-01-18 04:57:29,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2589 transitions. [2022-01-18 04:57:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:29,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:29,288 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:29,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:29,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-01-18 04:57:29,489 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash -313876813, now seen corresponding path program 260 times [2022-01-18 04:57:29,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:29,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201279596] [2022-01-18 04:57:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:29,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:29,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:29,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201279596] [2022-01-18 04:57:29,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201279596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045349791] [2022-01-18 04:57:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:29,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:29,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:29,615 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) [2022-01-18 04:57:29,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 04:57:29,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:29,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:30,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2022-01-18 04:57:30,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-01-18 04:57:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:30,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:30,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:30,145 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 73 treesize of output 67 [2022-01-18 04:57:30,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:30,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 51 [2022-01-18 04:57:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:30,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045349791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:30,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:30,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 04:57:30,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068897140] [2022-01-18 04:57:30,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:30,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:57:30,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:57:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:57:30,328 INFO L87 Difference]: Start difference. First operand 885 states and 2589 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:30,797 INFO L93 Difference]: Finished difference Result 959 states and 2712 transitions. [2022-01-18 04:57:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:57:30,798 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:30,799 INFO L225 Difference]: With dead ends: 959 [2022-01-18 04:57:30,799 INFO L226 Difference]: Without dead ends: 951 [2022-01-18 04:57:30,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:57:30,799 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 110 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:30,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 176 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-18 04:57:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 892. [2022-01-18 04:57:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.9281705948372614) internal successors, (2609), 891 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2609 transitions. [2022-01-18 04:57:30,808 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2609 transitions. Word has length 19 [2022-01-18 04:57:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:30,809 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 2609 transitions. [2022-01-18 04:57:30,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2609 transitions. [2022-01-18 04:57:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:30,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:30,810 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:30,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-01-18 04:57:31,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-01-18 04:57:31,010 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1856748087, now seen corresponding path program 261 times [2022-01-18 04:57:31,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394199708] [2022-01-18 04:57:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:31,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:31,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:31,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394199708] [2022-01-18 04:57:31,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394199708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:31,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335322783] [2022-01-18 04:57:31,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:57:31,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:31,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:31,146 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) [2022-01-18 04:57:31,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 04:57:31,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:57:31,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:31,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:57:31,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:57:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:31,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:31,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:31,605 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 63 treesize of output 59 [2022-01-18 04:57:31,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:31,611 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 51 treesize of output 47 [2022-01-18 04:57:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:31,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335322783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:31,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:31,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:31,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778677882] [2022-01-18 04:57:31,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:31,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:31,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:31,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:31,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:31,796 INFO L87 Difference]: Start difference. First operand 892 states and 2609 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:31,963 INFO L93 Difference]: Finished difference Result 944 states and 2690 transitions. [2022-01-18 04:57:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:57:31,964 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:31,965 INFO L225 Difference]: With dead ends: 944 [2022-01-18 04:57:31,965 INFO L226 Difference]: Without dead ends: 941 [2022-01-18 04:57:31,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:31,965 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:31,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 132 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-18 04:57:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 889. [2022-01-18 04:57:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.9234234234234235) internal successors, (2596), 888 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2596 transitions. [2022-01-18 04:57:31,974 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2596 transitions. Word has length 19 [2022-01-18 04:57:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:31,974 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2596 transitions. [2022-01-18 04:57:31,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2596 transitions. [2022-01-18 04:57:31,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:31,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:31,975 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:31,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-01-18 04:57:32,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:32,176 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash -690803093, now seen corresponding path program 262 times [2022-01-18 04:57:32,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:32,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724693099] [2022-01-18 04:57:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:32,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:32,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:32,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724693099] [2022-01-18 04:57:32,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724693099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:32,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80249260] [2022-01-18 04:57:32,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:57:32,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:32,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:32,326 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) [2022-01-18 04:57:32,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 04:57:32,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:57:32,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:32,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:32,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:32,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:32,945 INFO L353 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-01-18 04:57:32,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 51 [2022-01-18 04:57:32,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:32,950 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 04:57:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:33,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80249260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:33,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:33,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:33,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461761281] [2022-01-18 04:57:33,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:33,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:33,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:33,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:33,031 INFO L87 Difference]: Start difference. First operand 889 states and 2596 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:33,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:33,347 INFO L93 Difference]: Finished difference Result 981 states and 2782 transitions. [2022-01-18 04:57:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:57:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:33,348 INFO L225 Difference]: With dead ends: 981 [2022-01-18 04:57:33,348 INFO L226 Difference]: Without dead ends: 981 [2022-01-18 04:57:33,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:57:33,349 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 92 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:33,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 116 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-01-18 04:57:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 889. [2022-01-18 04:57:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.921171171171171) internal successors, (2594), 888 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2594 transitions. [2022-01-18 04:57:33,358 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2594 transitions. Word has length 19 [2022-01-18 04:57:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:33,358 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2594 transitions. [2022-01-18 04:57:33,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2594 transitions. [2022-01-18 04:57:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:33,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:33,359 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:33,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-01-18 04:57:33,559 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,SelfDestructingSolverStorable270 [2022-01-18 04:57:33,560 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 95250927, now seen corresponding path program 263 times [2022-01-18 04:57:33,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:33,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722515789] [2022-01-18 04:57:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:33,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:33,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722515789] [2022-01-18 04:57:33,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722515789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048551937] [2022-01-18 04:57:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:57:33,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:33,703 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) [2022-01-18 04:57:33,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 04:57:33,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 04:57:33,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:33,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:34,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:57:34,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:57:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:34,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:34,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:34,173 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 65 treesize of output 61 [2022-01-18 04:57:34,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:34,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2022-01-18 04:57:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048551937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:34,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:34,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:34,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742995632] [2022-01-18 04:57:34,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:34,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:34,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:34,346 INFO L87 Difference]: Start difference. First operand 889 states and 2594 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:35,013 INFO L93 Difference]: Finished difference Result 1022 states and 2842 transitions. [2022-01-18 04:57:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:57:35,013 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:35,014 INFO L225 Difference]: With dead ends: 1022 [2022-01-18 04:57:35,014 INFO L226 Difference]: Without dead ends: 1020 [2022-01-18 04:57:35,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1385, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 04:57:35,015 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:35,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 185 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2022-01-18 04:57:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 890. [2022-01-18 04:57:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.921259842519685) internal successors, (2597), 889 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2597 transitions. [2022-01-18 04:57:35,024 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2597 transitions. Word has length 19 [2022-01-18 04:57:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:35,024 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2597 transitions. [2022-01-18 04:57:35,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2597 transitions. [2022-01-18 04:57:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:35,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:35,025 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:35,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:35,226 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,SelfDestructingSolverStorable271 [2022-01-18 04:57:35,226 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:35,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2092932249, now seen corresponding path program 264 times [2022-01-18 04:57:35,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:35,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8180161] [2022-01-18 04:57:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:35,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:35,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:35,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8180161] [2022-01-18 04:57:35,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8180161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:35,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948096647] [2022-01-18 04:57:35,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:57:35,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:35,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:35,375 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) [2022-01-18 04:57:35,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 04:57:35,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 04:57:35,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:35,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:35,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:35,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:57:35,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:57:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:35,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:35,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:35,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-01-18 04:57:35,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:35,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 04:57:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:36,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948096647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:36,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:36,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:36,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59372388] [2022-01-18 04:57:36,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:36,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:36,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:36,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:36,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:36,011 INFO L87 Difference]: Start difference. First operand 890 states and 2597 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:36,546 INFO L93 Difference]: Finished difference Result 1000 states and 2822 transitions. [2022-01-18 04:57:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:57:36,546 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:36,547 INFO L225 Difference]: With dead ends: 1000 [2022-01-18 04:57:36,547 INFO L226 Difference]: Without dead ends: 998 [2022-01-18 04:57:36,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 04:57:36,547 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 95 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:36,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 122 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-01-18 04:57:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 887. [2022-01-18 04:57:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.9164785553047405) internal successors, (2584), 886 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2584 transitions. [2022-01-18 04:57:36,557 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2584 transitions. Word has length 19 [2022-01-18 04:57:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:36,557 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2584 transitions. [2022-01-18 04:57:36,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2584 transitions. [2022-01-18 04:57:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:36,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:36,558 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:36,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-01-18 04:57:36,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:36,758 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash 53238511, now seen corresponding path program 265 times [2022-01-18 04:57:36,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:36,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803616826] [2022-01-18 04:57:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:36,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:36,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:36,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803616826] [2022-01-18 04:57:36,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803616826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:36,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076111835] [2022-01-18 04:57:36,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:57:36,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:36,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:36,906 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) [2022-01-18 04:57:36,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 04:57:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:36,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:36,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:37,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:37,511 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 04:57:37,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 62 [2022-01-18 04:57:37,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:57:37,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:37,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-01-18 04:57:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:37,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076111835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:37,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:37,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:37,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120630413] [2022-01-18 04:57:37,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:37,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:37,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:37,686 INFO L87 Difference]: Start difference. First operand 887 states and 2584 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:38,521 INFO L93 Difference]: Finished difference Result 1028 states and 2884 transitions. [2022-01-18 04:57:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:57:38,521 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:38,523 INFO L225 Difference]: With dead ends: 1028 [2022-01-18 04:57:38,523 INFO L226 Difference]: Without dead ends: 1028 [2022-01-18 04:57:38,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 04:57:38,523 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 129 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:38,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 149 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-01-18 04:57:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 893. [2022-01-18 04:57:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.9170403587443947) internal successors, (2602), 892 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2602 transitions. [2022-01-18 04:57:38,533 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2602 transitions. Word has length 19 [2022-01-18 04:57:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:38,533 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 2602 transitions. [2022-01-18 04:57:38,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2602 transitions. [2022-01-18 04:57:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:38,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:38,534 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:38,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-01-18 04:57:38,735 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,SelfDestructingSolverStorable273 [2022-01-18 04:57:38,735 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:38,735 INFO L85 PathProgramCache]: Analyzing trace with hash 137521975, now seen corresponding path program 266 times [2022-01-18 04:57:38,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:38,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765274815] [2022-01-18 04:57:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:38,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:38,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:38,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765274815] [2022-01-18 04:57:38,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765274815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:38,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000319067] [2022-01-18 04:57:38,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:38,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:38,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:38,857 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) [2022-01-18 04:57:38,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 04:57:38,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:38,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:39,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:57:39,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:57:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:39,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:39,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:39,382 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 71 treesize of output 65 [2022-01-18 04:57:39,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:39,389 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 55 treesize of output 49 [2022-01-18 04:57:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:39,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000319067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:39,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:39,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:39,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270358233] [2022-01-18 04:57:39,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:39,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:39,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:39,535 INFO L87 Difference]: Start difference. First operand 893 states and 2602 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:39,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:39,896 INFO L93 Difference]: Finished difference Result 965 states and 2726 transitions. [2022-01-18 04:57:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:57:39,896 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:39,898 INFO L225 Difference]: With dead ends: 965 [2022-01-18 04:57:39,898 INFO L226 Difference]: Without dead ends: 965 [2022-01-18 04:57:39,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:57:39,898 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:39,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 192 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-01-18 04:57:39,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 891. [2022-01-18 04:57:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.9168539325842695) internal successors, (2596), 890 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2596 transitions. [2022-01-18 04:57:39,907 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2596 transitions. Word has length 19 [2022-01-18 04:57:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:39,907 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2596 transitions. [2022-01-18 04:57:39,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2596 transitions. [2022-01-18 04:57:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:39,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:39,908 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:39,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-01-18 04:57:40,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:40,109 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1207133969, now seen corresponding path program 267 times [2022-01-18 04:57:40,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:40,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492746670] [2022-01-18 04:57:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:40,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:40,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:40,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492746670] [2022-01-18 04:57:40,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492746670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:40,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269237491] [2022-01-18 04:57:40,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:57:40,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:40,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:40,232 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) [2022-01-18 04:57:40,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 04:57:40,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:57:40,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:40,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:40,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:57:40,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:57:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:40,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:40,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:40,785 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 41 treesize of output 39 [2022-01-18 04:57:40,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:40,790 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 29 treesize of output 27 [2022-01-18 04:57:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:40,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269237491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:40,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:40,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:40,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364204545] [2022-01-18 04:57:40,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:40,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:40,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:40,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:40,890 INFO L87 Difference]: Start difference. First operand 891 states and 2596 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:41,631 INFO L93 Difference]: Finished difference Result 1014 states and 2854 transitions. [2022-01-18 04:57:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:57:41,632 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:41,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:41,633 INFO L225 Difference]: With dead ends: 1014 [2022-01-18 04:57:41,633 INFO L226 Difference]: Without dead ends: 1012 [2022-01-18 04:57:41,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 04:57:41,633 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:41,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 169 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-01-18 04:57:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 896. [2022-01-18 04:57:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.91731843575419) internal successors, (2611), 895 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2611 transitions. [2022-01-18 04:57:41,643 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2611 transitions. Word has length 19 [2022-01-18 04:57:41,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:41,643 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2611 transitions. [2022-01-18 04:57:41,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2611 transitions. [2022-01-18 04:57:41,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:41,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:41,644 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:41,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-01-18 04:57:41,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:41,844 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:41,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash 939036791, now seen corresponding path program 268 times [2022-01-18 04:57:41,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:41,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171618141] [2022-01-18 04:57:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:41,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:42,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:42,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171618141] [2022-01-18 04:57:42,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171618141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:42,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549168759] [2022-01-18 04:57:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:57:42,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:42,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:42,011 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) [2022-01-18 04:57:42,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 04:57:42,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:57:42,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:42,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:42,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:42,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:42,535 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 42 treesize of output 40 [2022-01-18 04:57:42,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:42,540 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 30 treesize of output 28 [2022-01-18 04:57:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:42,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549168759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:42,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:42,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:42,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005292960] [2022-01-18 04:57:42,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:42,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:42,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:42,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:42,652 INFO L87 Difference]: Start difference. First operand 896 states and 2611 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:43,221 INFO L93 Difference]: Finished difference Result 970 states and 2764 transitions. [2022-01-18 04:57:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:57:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:43,222 INFO L225 Difference]: With dead ends: 970 [2022-01-18 04:57:43,222 INFO L226 Difference]: Without dead ends: 970 [2022-01-18 04:57:43,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 04:57:43,223 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:43,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 129 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-01-18 04:57:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 894. [2022-01-18 04:57:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 2.9171332586786116) internal successors, (2605), 893 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2605 transitions. [2022-01-18 04:57:43,232 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2605 transitions. Word has length 19 [2022-01-18 04:57:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:43,232 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 2605 transitions. [2022-01-18 04:57:43,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2605 transitions. [2022-01-18 04:57:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:43,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:43,233 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:43,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-01-18 04:57:43,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-01-18 04:57:43,433 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1249146385, now seen corresponding path program 269 times [2022-01-18 04:57:43,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:43,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394372507] [2022-01-18 04:57:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:43,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:43,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394372507] [2022-01-18 04:57:43,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394372507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065719672] [2022-01-18 04:57:43,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:57:43,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:43,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:43,556 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) [2022-01-18 04:57:43,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 04:57:43,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:57:43,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:43,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:43,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:44,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:44,031 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 42 treesize of output 40 [2022-01-18 04:57:44,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:44,036 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 30 treesize of output 28 [2022-01-18 04:57:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:44,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065719672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:44,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:44,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:44,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480440717] [2022-01-18 04:57:44,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:44,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:44,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:44,136 INFO L87 Difference]: Start difference. First operand 894 states and 2605 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:44,403 INFO L93 Difference]: Finished difference Result 954 states and 2727 transitions. [2022-01-18 04:57:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:57:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:44,404 INFO L225 Difference]: With dead ends: 954 [2022-01-18 04:57:44,404 INFO L226 Difference]: Without dead ends: 954 [2022-01-18 04:57:44,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:44,405 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:44,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 133 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-01-18 04:57:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 889. [2022-01-18 04:57:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.9166666666666665) internal successors, (2590), 888 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2590 transitions. [2022-01-18 04:57:44,414 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2590 transitions. Word has length 19 [2022-01-18 04:57:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:44,414 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2590 transitions. [2022-01-18 04:57:44,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2590 transitions. [2022-01-18 04:57:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:44,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:44,415 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:44,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-18 04:57:44,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-01-18 04:57:44,615 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -540868245, now seen corresponding path program 270 times [2022-01-18 04:57:44,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:44,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617465859] [2022-01-18 04:57:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:44,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:44,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:44,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617465859] [2022-01-18 04:57:44,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617465859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:44,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017023915] [2022-01-18 04:57:44,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:57:44,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:44,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:44,748 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) [2022-01-18 04:57:44,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 04:57:44,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:57:44,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:44,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:44,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:45,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:45,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:45,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:57:45,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:45,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:57:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:45,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017023915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:45,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:45,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:45,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178010754] [2022-01-18 04:57:45,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:45,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:45,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:45,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:45,352 INFO L87 Difference]: Start difference. First operand 889 states and 2590 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:45,748 INFO L93 Difference]: Finished difference Result 962 states and 2741 transitions. [2022-01-18 04:57:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:57:45,748 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:45,750 INFO L225 Difference]: With dead ends: 962 [2022-01-18 04:57:45,750 INFO L226 Difference]: Without dead ends: 962 [2022-01-18 04:57:45,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:57:45,750 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:45,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 166 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-18 04:57:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 890. [2022-01-18 04:57:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.916760404949381) internal successors, (2593), 889 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2593 transitions. [2022-01-18 04:57:45,760 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2593 transitions. Word has length 19 [2022-01-18 04:57:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:45,760 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2593 transitions. [2022-01-18 04:57:45,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2593 transitions. [2022-01-18 04:57:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:45,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:45,761 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:45,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:45,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-01-18 04:57:45,962 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1565915875, now seen corresponding path program 271 times [2022-01-18 04:57:45,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:45,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712622459] [2022-01-18 04:57:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:45,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:46,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:46,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712622459] [2022-01-18 04:57:46,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712622459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:46,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100208272] [2022-01-18 04:57:46,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:57:46,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:46,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:46,091 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) [2022-01-18 04:57:46,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 04:57:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:46,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:46,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:46,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:46,624 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 42 treesize of output 40 [2022-01-18 04:57:46,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:46,629 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 30 treesize of output 28 [2022-01-18 04:57:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:46,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100208272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:46,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:46,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:46,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792133260] [2022-01-18 04:57:46,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:46,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:46,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:46,735 INFO L87 Difference]: Start difference. First operand 890 states and 2593 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:47,375 INFO L93 Difference]: Finished difference Result 991 states and 2803 transitions. [2022-01-18 04:57:47,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:57:47,375 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:47,377 INFO L225 Difference]: With dead ends: 991 [2022-01-18 04:57:47,377 INFO L226 Difference]: Without dead ends: 991 [2022-01-18 04:57:47,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:57:47,377 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:47,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 141 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-01-18 04:57:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 889. [2022-01-18 04:57:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.9155405405405403) internal successors, (2589), 888 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2589 transitions. [2022-01-18 04:57:47,386 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2589 transitions. Word has length 19 [2022-01-18 04:57:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:47,386 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2589 transitions. [2022-01-18 04:57:47,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2589 transitions. [2022-01-18 04:57:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:47,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:47,387 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:47,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-01-18 04:57:47,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-18 04:57:47,588 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1942997401, now seen corresponding path program 272 times [2022-01-18 04:57:47,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:47,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119872291] [2022-01-18 04:57:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:47,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:47,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:47,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119872291] [2022-01-18 04:57:47,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119872291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:47,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013210020] [2022-01-18 04:57:47,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:47,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:47,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:47,718 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) [2022-01-18 04:57:47,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 04:57:47,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:47,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:47,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:48,070 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 98 treesize of output 82 [2022-01-18 04:57:48,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:57:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:48,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:48,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:48,264 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 73 treesize of output 67 [2022-01-18 04:57:48,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:48,270 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 57 treesize of output 51 [2022-01-18 04:57:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:48,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013210020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:48,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:48,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:48,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164360142] [2022-01-18 04:57:48,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:48,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:48,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:48,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:48,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:48,428 INFO L87 Difference]: Start difference. First operand 889 states and 2589 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:48,863 INFO L93 Difference]: Finished difference Result 970 states and 2732 transitions. [2022-01-18 04:57:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:57:48,863 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:48,865 INFO L225 Difference]: With dead ends: 970 [2022-01-18 04:57:48,865 INFO L226 Difference]: Without dead ends: 968 [2022-01-18 04:57:48,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:57:48,865 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:48,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 211 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-01-18 04:57:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 884. [2022-01-18 04:57:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.915062287655719) internal successors, (2574), 883 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2574 transitions. [2022-01-18 04:57:48,874 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2574 transitions. Word has length 19 [2022-01-18 04:57:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:48,874 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 2574 transitions. [2022-01-18 04:57:48,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2574 transitions. [2022-01-18 04:57:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:48,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:48,875 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:48,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:49,075 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,SelfDestructingSolverStorable280 [2022-01-18 04:57:49,076 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash 287456823, now seen corresponding path program 273 times [2022-01-18 04:57:49,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:49,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550258542] [2022-01-18 04:57:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:49,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:49,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:49,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550258542] [2022-01-18 04:57:49,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550258542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:49,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097635729] [2022-01-18 04:57:49,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:57:49,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:49,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:49,220 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) [2022-01-18 04:57:49,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 04:57:49,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:57:49,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:49,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:49,543 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 98 treesize of output 82 [2022-01-18 04:57:49,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:57:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:49,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:49,754 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:49,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 28 [2022-01-18 04:57:49,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 04:57:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:49,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097635729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:49,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:49,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:49,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144780865] [2022-01-18 04:57:49,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:49,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:49,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:49,860 INFO L87 Difference]: Start difference. First operand 884 states and 2574 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:51,764 INFO L93 Difference]: Finished difference Result 1249 states and 3537 transitions. [2022-01-18 04:57:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 04:57:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:51,766 INFO L225 Difference]: With dead ends: 1249 [2022-01-18 04:57:51,766 INFO L226 Difference]: Without dead ends: 1249 [2022-01-18 04:57:51,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=853, Invalid=4403, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 04:57:51,767 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:51,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 239 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:57:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-01-18 04:57:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1033. [2022-01-18 04:57:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.987403100775194) internal successors, (3083), 1032 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3083 transitions. [2022-01-18 04:57:51,779 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3083 transitions. Word has length 19 [2022-01-18 04:57:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:51,779 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 3083 transitions. [2022-01-18 04:57:51,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3083 transitions. [2022-01-18 04:57:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:51,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:51,780 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:51,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-01-18 04:57:51,980 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,SelfDestructingSolverStorable281 [2022-01-18 04:57:51,980 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:51,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1900726353, now seen corresponding path program 274 times [2022-01-18 04:57:51,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:51,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467096150] [2022-01-18 04:57:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:51,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:52,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:52,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467096150] [2022-01-18 04:57:52,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467096150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:52,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331006191] [2022-01-18 04:57:52,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:57:52,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:52,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:52,128 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) [2022-01-18 04:57:52,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 04:57:52,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:57:52,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:52,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:52,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:57:52,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:57:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:52,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:52,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:52,626 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 63 treesize of output 59 [2022-01-18 04:57:52,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:52,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2022-01-18 04:57:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:52,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331006191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:52,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:52,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:52,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847339970] [2022-01-18 04:57:52,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:52,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:52,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:52,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:52,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:52,806 INFO L87 Difference]: Start difference. First operand 1033 states and 3083 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:53,258 INFO L93 Difference]: Finished difference Result 1115 states and 3235 transitions. [2022-01-18 04:57:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:57:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:53,260 INFO L225 Difference]: With dead ends: 1115 [2022-01-18 04:57:53,260 INFO L226 Difference]: Without dead ends: 1112 [2022-01-18 04:57:53,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:57:53,260 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:53,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 146 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-01-18 04:57:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1035. [2022-01-18 04:57:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.983558994197292) internal successors, (3085), 1034 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 3085 transitions. [2022-01-18 04:57:53,272 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 3085 transitions. Word has length 19 [2022-01-18 04:57:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:53,272 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 3085 transitions. [2022-01-18 04:57:53,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 3085 transitions. [2022-01-18 04:57:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:53,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:53,273 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:53,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:53,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:53,474 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:53,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1977399727, now seen corresponding path program 275 times [2022-01-18 04:57:53,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:53,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172462118] [2022-01-18 04:57:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:53,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:53,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172462118] [2022-01-18 04:57:53,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172462118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357208754] [2022-01-18 04:57:53,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:57:53,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:53,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:53,618 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) [2022-01-18 04:57:53,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 04:57:53,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 04:57:53,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:53,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:53,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:53,933 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 87 treesize of output 71 [2022-01-18 04:57:53,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:57:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:54,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:54,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:54,131 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-01-18 04:57:54,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:54,136 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 27 treesize of output 27 [2022-01-18 04:57:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:54,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357208754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:54,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:54,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:54,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555373104] [2022-01-18 04:57:54,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:54,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:54,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:54,265 INFO L87 Difference]: Start difference. First operand 1035 states and 3085 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:54,510 INFO L93 Difference]: Finished difference Result 1120 states and 3258 transitions. [2022-01-18 04:57:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:57:54,510 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:54,512 INFO L225 Difference]: With dead ends: 1120 [2022-01-18 04:57:54,512 INFO L226 Difference]: Without dead ends: 1117 [2022-01-18 04:57:54,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:57:54,512 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:54,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 169 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-18 04:57:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1038. [2022-01-18 04:57:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 2.9836065573770494) internal successors, (3094), 1037 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3094 transitions. [2022-01-18 04:57:54,524 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3094 transitions. Word has length 19 [2022-01-18 04:57:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:54,524 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 3094 transitions. [2022-01-18 04:57:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3094 transitions. [2022-01-18 04:57:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:54,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:54,525 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:54,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:54,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:54,725 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash 695312235, now seen corresponding path program 276 times [2022-01-18 04:57:54,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:54,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407286807] [2022-01-18 04:57:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:54,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:54,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:54,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407286807] [2022-01-18 04:57:54,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407286807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:54,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74238305] [2022-01-18 04:57:54,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:57:54,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:54,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:54,877 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) [2022-01-18 04:57:54,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 04:57:54,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 04:57:54,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:54,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:54,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:55,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:55,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:55,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-01-18 04:57:55,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:55,326 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 25 treesize of output 25 [2022-01-18 04:57:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:55,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74238305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:55,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:55,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:55,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141720840] [2022-01-18 04:57:55,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:55,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:55,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:55,455 INFO L87 Difference]: Start difference. First operand 1038 states and 3094 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:55,859 INFO L93 Difference]: Finished difference Result 1137 states and 3292 transitions. [2022-01-18 04:57:55,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:57:55,859 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:55,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:55,860 INFO L225 Difference]: With dead ends: 1137 [2022-01-18 04:57:55,861 INFO L226 Difference]: Without dead ends: 1137 [2022-01-18 04:57:55,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:57:55,861 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:55,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 214 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:55,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-01-18 04:57:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1039. [2022-01-18 04:57:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.983622350674374) internal successors, (3097), 1038 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3097 transitions. [2022-01-18 04:57:55,872 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3097 transitions. Word has length 19 [2022-01-18 04:57:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:55,872 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 3097 transitions. [2022-01-18 04:57:55,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3097 transitions. [2022-01-18 04:57:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:55,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:55,873 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:55,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:56,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:56,074 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:56,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1481366255, now seen corresponding path program 277 times [2022-01-18 04:57:56,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:56,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474450315] [2022-01-18 04:57:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:56,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:56,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:56,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474450315] [2022-01-18 04:57:56,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474450315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:56,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497429186] [2022-01-18 04:57:56,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:57:56,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:56,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:56,231 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) [2022-01-18 04:57:56,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 04:57:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:56,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:57:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:56,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 04:57:56,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:57:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:56,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:56,953 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 04:57:56,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 62 [2022-01-18 04:57:56,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:57:56,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:56,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-01-18 04:57:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:57,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497429186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:57,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:57,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:57:57,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306055110] [2022-01-18 04:57:57,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:57,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:57:57,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:57:57,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:57:57,065 INFO L87 Difference]: Start difference. First operand 1039 states and 3097 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:58,511 INFO L93 Difference]: Finished difference Result 1256 states and 3558 transitions. [2022-01-18 04:57:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:57:58,511 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:58,512 INFO L225 Difference]: With dead ends: 1256 [2022-01-18 04:57:58,513 INFO L226 Difference]: Without dead ends: 1254 [2022-01-18 04:57:58,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=403, Invalid=2047, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 04:57:58,513 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 186 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:58,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 234 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:57:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-01-18 04:57:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1075. [2022-01-18 04:57:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 2.994413407821229) internal successors, (3216), 1074 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3216 transitions. [2022-01-18 04:57:58,537 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3216 transitions. Word has length 19 [2022-01-18 04:57:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:58,537 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 3216 transitions. [2022-01-18 04:57:58,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3216 transitions. [2022-01-18 04:57:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:58,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:58,538 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:58,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-01-18 04:57:58,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:58,739 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:57:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1439353839, now seen corresponding path program 278 times [2022-01-18 04:57:58,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:58,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859009060] [2022-01-18 04:57:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:58,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:58,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:58,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859009060] [2022-01-18 04:57:58,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859009060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:58,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581119540] [2022-01-18 04:57:58,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:58,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:58,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:58,886 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) [2022-01-18 04:57:58,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 04:57:58,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:58,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:57:58,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:59,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:59,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:59,330 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 33 treesize of output 33 [2022-01-18 04:57:59,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:59,335 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 25 treesize of output 25 [2022-01-18 04:57:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:59,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581119540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:59,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:59,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:57:59,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339903136] [2022-01-18 04:57:59,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:59,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:57:59,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:59,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:57:59,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:57:59,467 INFO L87 Difference]: Start difference. First operand 1075 states and 3216 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:59,957 INFO L93 Difference]: Finished difference Result 1157 states and 3393 transitions. [2022-01-18 04:57:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:57:59,957 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:57:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:59,959 INFO L225 Difference]: With dead ends: 1157 [2022-01-18 04:57:59,959 INFO L226 Difference]: Without dead ends: 1157 [2022-01-18 04:57:59,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:57:59,959 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:59,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 153 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:57:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-18 04:57:59,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1078. [2022-01-18 04:57:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.9944289693593316) internal successors, (3225), 1077 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3225 transitions. [2022-01-18 04:57:59,971 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3225 transitions. Word has length 19 [2022-01-18 04:57:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:59,971 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 3225 transitions. [2022-01-18 04:57:59,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:57:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3225 transitions. [2022-01-18 04:57:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:59,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:59,972 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:59,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-18 04:58:00,173 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,SelfDestructingSolverStorable286 [2022-01-18 04:58:00,173 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:00,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1523637303, now seen corresponding path program 279 times [2022-01-18 04:58:00,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:00,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092295752] [2022-01-18 04:58:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:00,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:00,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:00,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092295752] [2022-01-18 04:58:00,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092295752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:00,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847505791] [2022-01-18 04:58:00,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:00,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:00,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:00,306 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) [2022-01-18 04:58:00,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 04:58:00,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:58:00,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 04:58:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:00,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:58:00,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:58:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:00,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:00,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:00,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2022-01-18 04:58:00,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:00,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 49 [2022-01-18 04:58:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:01,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847505791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:01,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:01,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:58:01,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447927218] [2022-01-18 04:58:01,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:01,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:58:01,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:58:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:01,008 INFO L87 Difference]: Start difference. First operand 1078 states and 3225 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:58:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:01,489 INFO L93 Difference]: Finished difference Result 1170 states and 3385 transitions. [2022-01-18 04:58:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:58:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:01,491 INFO L225 Difference]: With dead ends: 1170 [2022-01-18 04:58:01,491 INFO L226 Difference]: Without dead ends: 1170 [2022-01-18 04:58:01,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:58:01,491 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 99 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:01,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 277 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-01-18 04:58:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1079. [2022-01-18 04:58:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 2.9935064935064934) internal successors, (3227), 1078 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3227 transitions. [2022-01-18 04:58:01,503 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3227 transitions. Word has length 19 [2022-01-18 04:58:01,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:01,503 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 3227 transitions. [2022-01-18 04:58:01,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:58:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3227 transitions. [2022-01-18 04:58:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:01,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:01,504 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:01,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-18 04:58:01,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-01-18 04:58:01,705 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:01,705 INFO L85 PathProgramCache]: Analyzing trace with hash 178981359, now seen corresponding path program 280 times [2022-01-18 04:58:01,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:01,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334254957] [2022-01-18 04:58:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:01,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:01,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334254957] [2022-01-18 04:58:01,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334254957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053770070] [2022-01-18 04:58:01,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:01,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:01,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:01,835 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) [2022-01-18 04:58:01,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 04:58:01,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:01,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:02,152 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 87 treesize of output 71 [2022-01-18 04:58:02,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:58:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:02,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:02,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:02,383 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 42 treesize of output 40 [2022-01-18 04:58:02,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:02,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:58:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:02,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053770070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:02,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:02,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:02,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669329798] [2022-01-18 04:58:02,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:02,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:02,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:02,503 INFO L87 Difference]: Start difference. First operand 1079 states and 3227 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:03,302 INFO L93 Difference]: Finished difference Result 1195 states and 3471 transitions. [2022-01-18 04:58:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:58:03,302 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:03,303 INFO L225 Difference]: With dead ends: 1195 [2022-01-18 04:58:03,303 INFO L226 Difference]: Without dead ends: 1193 [2022-01-18 04:58:03,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:58:03,304 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 131 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:03,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 145 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-01-18 04:58:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1083. [2022-01-18 04:58:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.988909426987061) internal successors, (3234), 1082 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 3234 transitions. [2022-01-18 04:58:03,316 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 3234 transitions. Word has length 19 [2022-01-18 04:58:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:03,316 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 3234 transitions. [2022-01-18 04:58:03,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 3234 transitions. [2022-01-18 04:58:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:03,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:03,317 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:03,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:03,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:03,518 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1969815177, now seen corresponding path program 281 times [2022-01-18 04:58:03,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:03,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811181568] [2022-01-18 04:58:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:03,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:03,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:03,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811181568] [2022-01-18 04:58:03,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811181568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:03,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808177765] [2022-01-18 04:58:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:03,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:03,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:03,646 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) [2022-01-18 04:58:03,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 04:58:03,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:58:03,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:58:03,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:04,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:04,246 INFO L353 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2022-01-18 04:58:04,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 49 [2022-01-18 04:58:04,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:04,251 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 29 treesize of output 27 [2022-01-18 04:58:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:04,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808177765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:04,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:04,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:04,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96002016] [2022-01-18 04:58:04,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:04,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:04,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:04,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:04,337 INFO L87 Difference]: Start difference. First operand 1083 states and 3234 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:05,137 INFO L93 Difference]: Finished difference Result 1146 states and 3359 transitions. [2022-01-18 04:58:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:58:05,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:05,139 INFO L225 Difference]: With dead ends: 1146 [2022-01-18 04:58:05,139 INFO L226 Difference]: Without dead ends: 1146 [2022-01-18 04:58:05,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 04:58:05,139 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:05,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 127 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-01-18 04:58:05,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1074. [2022-01-18 04:58:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.988816402609506) internal successors, (3207), 1073 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3207 transitions. [2022-01-18 04:58:05,151 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3207 transitions. Word has length 19 [2022-01-18 04:58:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:05,151 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 3207 transitions. [2022-01-18 04:58:05,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3207 transitions. [2022-01-18 04:58:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:05,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:05,152 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:05,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:05,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-18 04:58:05,353 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:05,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:05,353 INFO L85 PathProgramCache]: Analyzing trace with hash 136968943, now seen corresponding path program 282 times [2022-01-18 04:58:05,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:05,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358445965] [2022-01-18 04:58:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:05,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:05,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:05,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358445965] [2022-01-18 04:58:05,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358445965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:05,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841374263] [2022-01-18 04:58:05,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:05,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:05,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:05,485 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) [2022-01-18 04:58:05,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 04:58:05,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:58:05,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:05,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:05,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:05,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:05,976 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 42 treesize of output 40 [2022-01-18 04:58:05,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:05,981 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 30 treesize of output 28 [2022-01-18 04:58:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:06,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841374263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:06,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:06,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:06,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050241009] [2022-01-18 04:58:06,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:06,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:06,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:06,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:06,089 INFO L87 Difference]: Start difference. First operand 1074 states and 3207 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:06,451 INFO L93 Difference]: Finished difference Result 1124 states and 3301 transitions. [2022-01-18 04:58:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:58:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:06,452 INFO L225 Difference]: With dead ends: 1124 [2022-01-18 04:58:06,452 INFO L226 Difference]: Without dead ends: 1124 [2022-01-18 04:58:06,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:58:06,453 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:06,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 145 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-01-18 04:58:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1060. [2022-01-18 04:58:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 2.988668555240793) internal successors, (3165), 1059 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 3165 transitions. [2022-01-18 04:58:06,464 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 3165 transitions. Word has length 19 [2022-01-18 04:58:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:06,464 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 3165 transitions. [2022-01-18 04:58:06,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 3165 transitions. [2022-01-18 04:58:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:06,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:06,465 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:06,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:06,665 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,SelfDestructingSolverStorable290 [2022-01-18 04:58:06,665 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:06,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1868924263, now seen corresponding path program 283 times [2022-01-18 04:58:06,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:06,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670582772] [2022-01-18 04:58:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:06,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:06,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:06,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670582772] [2022-01-18 04:58:06,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670582772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:06,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089339067] [2022-01-18 04:58:06,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:06,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:06,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:06,782 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) [2022-01-18 04:58:06,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 04:58:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:06,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:07,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:58:07,128 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 71 treesize of output 55 [2022-01-18 04:58:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:07,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:07,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:07,370 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 41 treesize of output 39 [2022-01-18 04:58:07,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:07,375 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 29 treesize of output 27 [2022-01-18 04:58:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:07,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089339067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:07,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:07,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:58:07,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109075437] [2022-01-18 04:58:07,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:07,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:58:07,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:07,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:58:07,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:07,465 INFO L87 Difference]: Start difference. First operand 1060 states and 3165 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:08,496 INFO L93 Difference]: Finished difference Result 1170 states and 3392 transitions. [2022-01-18 04:58:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:58:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:08,498 INFO L225 Difference]: With dead ends: 1170 [2022-01-18 04:58:08,498 INFO L226 Difference]: Without dead ends: 1168 [2022-01-18 04:58:08,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=1896, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 04:58:08,499 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 198 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:08,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 138 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2022-01-18 04:58:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1058. [2022-01-18 04:58:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 2.988647114474929) internal successors, (3159), 1057 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3159 transitions. [2022-01-18 04:58:08,510 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3159 transitions. Word has length 19 [2022-01-18 04:58:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:08,511 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3159 transitions. [2022-01-18 04:58:08,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:08,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3159 transitions. [2022-01-18 04:58:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:08,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:08,512 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:08,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:08,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:08,712 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash -279872273, now seen corresponding path program 284 times [2022-01-18 04:58:08,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:08,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462726363] [2022-01-18 04:58:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:08,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:08,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:08,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462726363] [2022-01-18 04:58:08,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462726363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:08,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55314115] [2022-01-18 04:58:08,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:08,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:08,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:08,834 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) [2022-01-18 04:58:08,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 04:58:08,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:08,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:08,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:58:08,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:09,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:09,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:09,413 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 43 treesize of output 41 [2022-01-18 04:58:09,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:09,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 04:58:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:09,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55314115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:09,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:09,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:58:09,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854454591] [2022-01-18 04:58:09,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:09,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:58:09,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:58:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:09,515 INFO L87 Difference]: Start difference. First operand 1058 states and 3159 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:10,553 INFO L93 Difference]: Finished difference Result 1165 states and 3384 transitions. [2022-01-18 04:58:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:58:10,553 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:10,554 INFO L225 Difference]: With dead ends: 1165 [2022-01-18 04:58:10,554 INFO L226 Difference]: Without dead ends: 1165 [2022-01-18 04:58:10,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 04:58:10,555 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 131 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:10,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 150 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-01-18 04:58:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1059. [2022-01-18 04:58:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 2.988657844990548) internal successors, (3162), 1058 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3162 transitions. [2022-01-18 04:58:10,566 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3162 transitions. Word has length 19 [2022-01-18 04:58:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:10,566 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 3162 transitions. [2022-01-18 04:58:10,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3162 transitions. [2022-01-18 04:58:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:10,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:10,568 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:10,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:10,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:10,768 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1826911847, now seen corresponding path program 285 times [2022-01-18 04:58:10,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:10,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769756275] [2022-01-18 04:58:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:10,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:10,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:10,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769756275] [2022-01-18 04:58:10,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769756275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:10,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319463122] [2022-01-18 04:58:10,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:10,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:10,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:10,887 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) [2022-01-18 04:58:10,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 04:58:10,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:58:10,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:10,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:58:10,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:11,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:11,461 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:58:11,462 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 42 treesize of output 35 [2022-01-18 04:58:11,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 11 [2022-01-18 04:58:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:11,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319463122] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:11,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:11,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 04:58:11,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039225118] [2022-01-18 04:58:11,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:11,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:58:11,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:11,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:58:11,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:58:11,553 INFO L87 Difference]: Start difference. First operand 1059 states and 3162 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-01-18 04:58:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:15,770 INFO L93 Difference]: Finished difference Result 1582 states and 4382 transitions. [2022-01-18 04:58:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 04:58:15,770 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:15,772 INFO L225 Difference]: With dead ends: 1582 [2022-01-18 04:58:15,772 INFO L226 Difference]: Without dead ends: 1582 [2022-01-18 04:58:15,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3056 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1709, Invalid=8391, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 04:58:15,773 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 199 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:15,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 345 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:58:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-01-18 04:58:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1134. [2022-01-18 04:58:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.006178287731686) internal successors, (3406), 1133 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3406 transitions. [2022-01-18 04:58:15,787 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3406 transitions. Word has length 19 [2022-01-18 04:58:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:15,787 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 3406 transitions. [2022-01-18 04:58:15,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-01-18 04:58:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3406 transitions. [2022-01-18 04:58:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:15,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:15,788 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:15,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:15,988 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,SelfDestructingSolverStorable293 [2022-01-18 04:58:15,988 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1582257169, now seen corresponding path program 286 times [2022-01-18 04:58:15,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:15,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603001967] [2022-01-18 04:58:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:15,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:16,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603001967] [2022-01-18 04:58:16,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603001967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363374951] [2022-01-18 04:58:16,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:16,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:16,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:16,103 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) [2022-01-18 04:58:16,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 04:58:16,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:16,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:16,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:16,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:16,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:16,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:16,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-18 04:58:16,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:16,608 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 29 treesize of output 27 [2022-01-18 04:58:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:16,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363374951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:16,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:16,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:58:16,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838973253] [2022-01-18 04:58:16,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:16,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:58:16,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:16,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:58:16,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:16,697 INFO L87 Difference]: Start difference. First operand 1134 states and 3406 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:17,050 INFO L93 Difference]: Finished difference Result 1262 states and 3694 transitions. [2022-01-18 04:58:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:58:17,050 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:17,051 INFO L225 Difference]: With dead ends: 1262 [2022-01-18 04:58:17,051 INFO L226 Difference]: Without dead ends: 1262 [2022-01-18 04:58:17,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:58:17,052 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:17,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 138 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-01-18 04:58:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1123. [2022-01-18 04:58:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 3.0053475935828877) internal successors, (3372), 1122 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 3372 transitions. [2022-01-18 04:58:17,064 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 3372 transitions. Word has length 19 [2022-01-18 04:58:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:17,064 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 3372 transitions. [2022-01-18 04:58:17,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 3372 transitions. [2022-01-18 04:58:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:17,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:17,065 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:17,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-01-18 04:58:17,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:17,266 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:17,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:17,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1400549103, now seen corresponding path program 287 times [2022-01-18 04:58:17,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:17,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97002489] [2022-01-18 04:58:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:17,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:17,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:17,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97002489] [2022-01-18 04:58:17,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97002489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:17,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659840857] [2022-01-18 04:58:17,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:17,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:17,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:17,386 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) [2022-01-18 04:58:17,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 04:58:17,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:58:17,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:17,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:17,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:17,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:17,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:58:17,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:17,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 04:58:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:17,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659840857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:17,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:17,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:17,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41603167] [2022-01-18 04:58:17,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:17,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:17,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:17,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:17,995 INFO L87 Difference]: Start difference. First operand 1123 states and 3372 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:18,500 INFO L93 Difference]: Finished difference Result 1236 states and 3615 transitions. [2022-01-18 04:58:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:58:18,500 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:18,502 INFO L225 Difference]: With dead ends: 1236 [2022-01-18 04:58:18,502 INFO L226 Difference]: Without dead ends: 1236 [2022-01-18 04:58:18,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:58:18,502 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:18,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 176 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-01-18 04:58:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1125. [2022-01-18 04:58:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.005338078291815) internal successors, (3378), 1124 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3378 transitions. [2022-01-18 04:58:18,515 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3378 transitions. Word has length 19 [2022-01-18 04:58:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:18,515 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3378 transitions. [2022-01-18 04:58:18,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3378 transitions. [2022-01-18 04:58:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:18,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:18,516 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:18,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:18,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:18,717 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash -787634073, now seen corresponding path program 288 times [2022-01-18 04:58:18,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:18,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973185450] [2022-01-18 04:58:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:18,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:18,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:18,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973185450] [2022-01-18 04:58:18,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973185450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:18,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852281403] [2022-01-18 04:58:18,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:18,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:18,854 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) [2022-01-18 04:58:18,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 04:58:18,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:58:18,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:18,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 04:58:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:19,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:19,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:19,378 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 43 treesize of output 41 [2022-01-18 04:58:19,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:19,383 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 31 treesize of output 29 [2022-01-18 04:58:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:19,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852281403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:19,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:19,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:58:19,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406622951] [2022-01-18 04:58:19,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:19,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:58:19,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:19,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:58:19,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:19,483 INFO L87 Difference]: Start difference. First operand 1125 states and 3378 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:58:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:20,237 INFO L93 Difference]: Finished difference Result 1276 states and 3699 transitions. [2022-01-18 04:58:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:58:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:20,239 INFO L225 Difference]: With dead ends: 1276 [2022-01-18 04:58:20,239 INFO L226 Difference]: Without dead ends: 1276 [2022-01-18 04:58:20,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:58:20,239 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:20,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 148 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-01-18 04:58:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1124. [2022-01-18 04:58:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 3.0053428317008013) internal successors, (3375), 1123 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3375 transitions. [2022-01-18 04:58:20,252 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3375 transitions. Word has length 19 [2022-01-18 04:58:20,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:20,252 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 3375 transitions. [2022-01-18 04:58:20,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 04:58:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3375 transitions. [2022-01-18 04:58:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:20,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:20,253 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:20,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:20,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:20,453 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:20,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:20,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2093174571, now seen corresponding path program 289 times [2022-01-18 04:58:20,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:20,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241376982] [2022-01-18 04:58:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:20,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:20,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:20,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241376982] [2022-01-18 04:58:20,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241376982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:20,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957950215] [2022-01-18 04:58:20,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:20,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:20,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:20,587 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) [2022-01-18 04:58:20,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 04:58:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:20,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:20,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:58:20,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:58:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:20,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:21,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:21,109 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 73 treesize of output 67 [2022-01-18 04:58:21,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:21,116 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 57 treesize of output 51 [2022-01-18 04:58:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:21,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957950215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:21,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:21,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:21,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817574791] [2022-01-18 04:58:21,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:21,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:21,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:21,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:21,262 INFO L87 Difference]: Start difference. First operand 1124 states and 3375 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:21,814 INFO L93 Difference]: Finished difference Result 1222 states and 3547 transitions. [2022-01-18 04:58:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:58:21,814 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:21,815 INFO L225 Difference]: With dead ends: 1222 [2022-01-18 04:58:21,815 INFO L226 Difference]: Without dead ends: 1216 [2022-01-18 04:58:21,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 04:58:21,816 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:21,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 226 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-01-18 04:58:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1111. [2022-01-18 04:58:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 3.0054054054054054) internal successors, (3336), 1110 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3336 transitions. [2022-01-18 04:58:21,828 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3336 transitions. Word has length 19 [2022-01-18 04:58:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:21,828 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 3336 transitions. [2022-01-18 04:58:21,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3336 transitions. [2022-01-18 04:58:21,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:21,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:21,829 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:21,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:22,029 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,SelfDestructingSolverStorable297 [2022-01-18 04:58:22,030 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash 28661499, now seen corresponding path program 290 times [2022-01-18 04:58:22,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:22,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366350785] [2022-01-18 04:58:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:22,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:22,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:22,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366350785] [2022-01-18 04:58:22,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366350785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:22,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297451102] [2022-01-18 04:58:22,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:22,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:22,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:22,169 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) [2022-01-18 04:58:22,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 04:58:22,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:22,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 04:58:22,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:22,482 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 89 treesize of output 73 [2022-01-18 04:58:22,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:58:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:22,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:22,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:22,761 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 35 treesize of output 35 [2022-01-18 04:58:22,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:22,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 04:58:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:22,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297451102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:22,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:22,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:22,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281860850] [2022-01-18 04:58:22,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:22,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:22,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:22,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:22,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:22,888 INFO L87 Difference]: Start difference. First operand 1111 states and 3336 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:23,625 INFO L93 Difference]: Finished difference Result 1277 states and 3689 transitions. [2022-01-18 04:58:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:58:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:23,627 INFO L225 Difference]: With dead ends: 1277 [2022-01-18 04:58:23,627 INFO L226 Difference]: Without dead ends: 1271 [2022-01-18 04:58:23,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=1693, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:58:23,627 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:23,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 187 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-01-18 04:58:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1118. [2022-01-18 04:58:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.0062667860340198) internal successors, (3358), 1117 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3358 transitions. [2022-01-18 04:58:23,641 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3358 transitions. Word has length 19 [2022-01-18 04:58:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:23,641 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3358 transitions. [2022-01-18 04:58:23,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3358 transitions. [2022-01-18 04:58:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:23,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:23,642 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:23,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-18 04:58:23,842 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,SelfDestructingSolverStorable298 [2022-01-18 04:58:23,842 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2135445619, now seen corresponding path program 291 times [2022-01-18 04:58:23,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:23,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862146171] [2022-01-18 04:58:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:23,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:23,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:23,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862146171] [2022-01-18 04:58:23,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862146171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:23,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638599300] [2022-01-18 04:58:23,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:23,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:23,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:23,979 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) [2022-01-18 04:58:23,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 04:58:24,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:58:24,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:24,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:24,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:24,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:58:24,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:58:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:24,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:24,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:24,465 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 63 treesize of output 59 [2022-01-18 04:58:24,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:24,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2022-01-18 04:58:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:24,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638599300] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:24,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:24,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:24,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937729622] [2022-01-18 04:58:24,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:24,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:24,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:24,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:24,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:24,631 INFO L87 Difference]: Start difference. First operand 1118 states and 3358 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:25,158 INFO L93 Difference]: Finished difference Result 1220 states and 3548 transitions. [2022-01-18 04:58:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:58:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:25,160 INFO L225 Difference]: With dead ends: 1220 [2022-01-18 04:58:25,160 INFO L226 Difference]: Without dead ends: 1220 [2022-01-18 04:58:25,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:58:25,161 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:25,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 207 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:25,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-01-18 04:58:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1118. [2022-01-18 04:58:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.0053715308863027) internal successors, (3357), 1117 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3357 transitions. [2022-01-18 04:58:25,173 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3357 transitions. Word has length 19 [2022-01-18 04:58:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:25,173 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3357 transitions. [2022-01-18 04:58:25,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3357 transitions. [2022-01-18 04:58:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:25,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:25,174 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:25,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:25,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-01-18 04:58:25,375 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash 790789675, now seen corresponding path program 292 times [2022-01-18 04:58:25,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:25,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556243954] [2022-01-18 04:58:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:25,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:25,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:25,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556243954] [2022-01-18 04:58:25,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556243954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:25,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093389431] [2022-01-18 04:58:25,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:25,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:25,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:25,525 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) [2022-01-18 04:58:25,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 04:58:25,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:25,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:25,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:25,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:58:25,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-01-18 04:58:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:25,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:26,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:26,015 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 33 treesize of output 33 [2022-01-18 04:58:26,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:26,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-01-18 04:58:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:26,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093389431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:26,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:26,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:26,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737729132] [2022-01-18 04:58:26,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:26,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:26,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:26,147 INFO L87 Difference]: Start difference. First operand 1118 states and 3357 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:26,682 INFO L93 Difference]: Finished difference Result 1262 states and 3658 transitions. [2022-01-18 04:58:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:58:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:26,684 INFO L225 Difference]: With dead ends: 1262 [2022-01-18 04:58:26,684 INFO L226 Difference]: Without dead ends: 1260 [2022-01-18 04:58:26,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:58:26,684 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:26,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 149 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-01-18 04:58:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1120. [2022-01-18 04:58:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.998212689901698) internal successors, (3355), 1119 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3355 transitions. [2022-01-18 04:58:26,697 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3355 transitions. Word has length 19 [2022-01-18 04:58:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:26,697 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3355 transitions. [2022-01-18 04:58:26,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3355 transitions. [2022-01-18 04:58:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:26,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:26,698 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:26,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:26,898 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,SelfDestructingSolverStorable300 [2022-01-18 04:58:26,898 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1358006861, now seen corresponding path program 293 times [2022-01-18 04:58:26,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:26,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439934009] [2022-01-18 04:58:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:26,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:27,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439934009] [2022-01-18 04:58:27,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439934009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939324878] [2022-01-18 04:58:27,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:27,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:27,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:27,049 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) [2022-01-18 04:58:27,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 04:58:27,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:58:27,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:27,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:27,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:27,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:27,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 34 [2022-01-18 04:58:27,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:27,533 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 26 treesize of output 26 [2022-01-18 04:58:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:27,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939324878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:27,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:27,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:27,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894357763] [2022-01-18 04:58:27,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:27,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:27,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:27,654 INFO L87 Difference]: Start difference. First operand 1120 states and 3355 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:28,135 INFO L93 Difference]: Finished difference Result 1207 states and 3541 transitions. [2022-01-18 04:58:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:58:28,135 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:28,137 INFO L225 Difference]: With dead ends: 1207 [2022-01-18 04:58:28,137 INFO L226 Difference]: Without dead ends: 1207 [2022-01-18 04:58:28,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:58:28,137 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:28,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 168 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-01-18 04:58:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1114. [2022-01-18 04:58:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.9964061096136567) internal successors, (3335), 1113 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3335 transitions. [2022-01-18 04:58:28,149 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3335 transitions. Word has length 19 [2022-01-18 04:58:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:28,149 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 3335 transitions. [2022-01-18 04:58:28,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3335 transitions. [2022-01-18 04:58:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:28,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:28,150 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:28,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:28,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:28,351 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:28,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:28,351 INFO L85 PathProgramCache]: Analyzing trace with hash -928436437, now seen corresponding path program 294 times [2022-01-18 04:58:28,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:28,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820975399] [2022-01-18 04:58:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:28,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:28,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:28,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820975399] [2022-01-18 04:58:28,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820975399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:28,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190121386] [2022-01-18 04:58:28,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:28,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:28,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:28,462 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) [2022-01-18 04:58:28,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 04:58:28,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:58:28,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:28,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:28,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:28,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:58:28,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:58:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:28,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:29,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:29,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:58:29,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:29,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:58:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:29,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190121386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:29,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:29,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 04:58:29,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331375147] [2022-01-18 04:58:29,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:29,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 04:58:29,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:29,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 04:58:29,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:58:29,106 INFO L87 Difference]: Start difference. First operand 1114 states and 3335 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:29,855 INFO L93 Difference]: Finished difference Result 1310 states and 3766 transitions. [2022-01-18 04:58:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:58:29,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:29,857 INFO L225 Difference]: With dead ends: 1310 [2022-01-18 04:58:29,857 INFO L226 Difference]: Without dead ends: 1308 [2022-01-18 04:58:29,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:58:29,857 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 143 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:29,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-01-18 04:58:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1125. [2022-01-18 04:58:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.99644128113879) internal successors, (3368), 1124 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3368 transitions. [2022-01-18 04:58:29,869 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3368 transitions. Word has length 19 [2022-01-18 04:58:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:29,869 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3368 transitions. [2022-01-18 04:58:29,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3368 transitions. [2022-01-18 04:58:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:29,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:29,871 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:29,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:30,071 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,SelfDestructingSolverStorable302 [2022-01-18 04:58:30,071 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:30,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:30,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1217734323, now seen corresponding path program 295 times [2022-01-18 04:58:30,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:30,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513367707] [2022-01-18 04:58:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:30,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:30,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:30,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513367707] [2022-01-18 04:58:30,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513367707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:30,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285457676] [2022-01-18 04:58:30,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:30,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:30,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:30,192 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) [2022-01-18 04:58:30,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 04:58:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:30,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:30,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:30,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:30,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:30,693 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 41 treesize of output 39 [2022-01-18 04:58:30,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:30,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 04:58:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:30,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285457676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:30,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:30,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:30,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099095286] [2022-01-18 04:58:30,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:30,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:30,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:30,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:30,804 INFO L87 Difference]: Start difference. First operand 1125 states and 3368 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:31,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:31,400 INFO L93 Difference]: Finished difference Result 1273 states and 3678 transitions. [2022-01-18 04:58:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:58:31,401 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:31,402 INFO L225 Difference]: With dead ends: 1273 [2022-01-18 04:58:31,402 INFO L226 Difference]: Without dead ends: 1273 [2022-01-18 04:58:31,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:58:31,402 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 83 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:31,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 145 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-01-18 04:58:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1117. [2022-01-18 04:58:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9955197132616487) internal successors, (3343), 1116 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3343 transitions. [2022-01-18 04:58:31,414 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3343 transitions. Word has length 19 [2022-01-18 04:58:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:31,414 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 3343 transitions. [2022-01-18 04:58:31,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3343 transitions. [2022-01-18 04:58:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:31,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:31,416 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:31,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-01-18 04:58:31,616 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,SelfDestructingSolverStorable303 [2022-01-18 04:58:31,616 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash -970448853, now seen corresponding path program 296 times [2022-01-18 04:58:31,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:31,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297247869] [2022-01-18 04:58:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:31,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:31,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:31,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297247869] [2022-01-18 04:58:31,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297247869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:31,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543583985] [2022-01-18 04:58:31,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:31,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:31,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:31,739 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) [2022-01-18 04:58:31,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 04:58:31,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:58:31,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:32,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:32,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:32,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 04:58:32,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:32,223 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 31 treesize of output 29 [2022-01-18 04:58:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:32,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543583985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:32,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:32,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:32,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003276413] [2022-01-18 04:58:32,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:32,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:32,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:32,328 INFO L87 Difference]: Start difference. First operand 1117 states and 3343 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:32,603 INFO L93 Difference]: Finished difference Result 1223 states and 3564 transitions. [2022-01-18 04:58:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:58:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:32,604 INFO L225 Difference]: With dead ends: 1223 [2022-01-18 04:58:32,604 INFO L226 Difference]: Without dead ends: 1223 [2022-01-18 04:58:32,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:32,605 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:32,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 154 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:32,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-01-18 04:58:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1110. [2022-01-18 04:58:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 2.9954914337240757) internal successors, (3322), 1109 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 3322 transitions. [2022-01-18 04:58:32,617 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 3322 transitions. Word has length 19 [2022-01-18 04:58:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:32,617 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 3322 transitions. [2022-01-18 04:58:32,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 3322 transitions. [2022-01-18 04:58:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:32,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:32,618 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:32,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-01-18 04:58:32,818 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,SelfDestructingSolverStorable304 [2022-01-18 04:58:32,818 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash 436516911, now seen corresponding path program 297 times [2022-01-18 04:58:32,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:32,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419845289] [2022-01-18 04:58:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:32,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:32,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:32,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419845289] [2022-01-18 04:58:32,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419845289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:32,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026336517] [2022-01-18 04:58:32,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:32,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:32,961 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) [2022-01-18 04:58:32,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 04:58:33,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:58:33,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:33,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 04:58:33,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:33,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:33,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:33,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-01-18 04:58:33,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:33,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 04:58:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:33,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026336517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:33,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:33,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:58:33,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136379285] [2022-01-18 04:58:33,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:33,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:58:33,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:58:33,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:33,555 INFO L87 Difference]: Start difference. First operand 1110 states and 3322 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:34,256 INFO L93 Difference]: Finished difference Result 1253 states and 3610 transitions. [2022-01-18 04:58:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 04:58:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:34,258 INFO L225 Difference]: With dead ends: 1253 [2022-01-18 04:58:34,258 INFO L226 Difference]: Without dead ends: 1253 [2022-01-18 04:58:34,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:58:34,258 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 254 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:34,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 272 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2022-01-18 04:58:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1111. [2022-01-18 04:58:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 2.9954954954954953) internal successors, (3325), 1110 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:34,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3325 transitions. [2022-01-18 04:58:34,270 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3325 transitions. Word has length 19 [2022-01-18 04:58:34,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:34,270 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 3325 transitions. [2022-01-18 04:58:34,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3325 transitions. [2022-01-18 04:58:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:34,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:34,272 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:34,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-18 04:58:34,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:34,472 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:34,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1222570931, now seen corresponding path program 298 times [2022-01-18 04:58:34,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:34,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272923030] [2022-01-18 04:58:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:34,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:34,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:34,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272923030] [2022-01-18 04:58:34,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272923030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:34,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549390194] [2022-01-18 04:58:34,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:34,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:34,616 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) [2022-01-18 04:58:34,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 04:58:34,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:34,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:34,926 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 96 treesize of output 80 [2022-01-18 04:58:34,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:58:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:34,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:35,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:35,081 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 65 treesize of output 61 [2022-01-18 04:58:35,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:35,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2022-01-18 04:58:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:35,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549390194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:35,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:35,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440015996] [2022-01-18 04:58:35,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:35,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:35,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:35,256 INFO L87 Difference]: Start difference. First operand 1111 states and 3325 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:35,722 INFO L93 Difference]: Finished difference Result 1219 states and 3524 transitions. [2022-01-18 04:58:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:58:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:35,724 INFO L225 Difference]: With dead ends: 1219 [2022-01-18 04:58:35,724 INFO L226 Difference]: Without dead ends: 1217 [2022-01-18 04:58:35,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:58:35,725 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:35,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 203 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-01-18 04:58:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1112. [2022-01-18 04:58:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.993699369936994) internal successors, (3326), 1111 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3326 transitions. [2022-01-18 04:58:35,737 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3326 transitions. Word has length 19 [2022-01-18 04:58:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:35,737 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3326 transitions. [2022-01-18 04:58:35,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3326 transitions. [2022-01-18 04:58:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:35,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:35,738 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:35,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:35,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:35,939 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1180558515, now seen corresponding path program 299 times [2022-01-18 04:58:35,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:35,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243181732] [2022-01-18 04:58:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:35,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:36,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:36,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243181732] [2022-01-18 04:58:36,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243181732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:36,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830919475] [2022-01-18 04:58:36,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:36,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:36,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:36,097 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) [2022-01-18 04:58:36,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 04:58:36,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:58:36,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:36,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:36,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:36,541 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 34 treesize of output 34 [2022-01-18 04:58:36,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:36,546 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 26 treesize of output 26 [2022-01-18 04:58:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:36,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830919475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:36,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:36,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:36,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719258418] [2022-01-18 04:58:36,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:36,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:36,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:36,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:36,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:36,663 INFO L87 Difference]: Start difference. First operand 1112 states and 3326 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:37,347 INFO L93 Difference]: Finished difference Result 1245 states and 3606 transitions. [2022-01-18 04:58:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:58:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:37,349 INFO L225 Difference]: With dead ends: 1245 [2022-01-18 04:58:37,349 INFO L226 Difference]: Without dead ends: 1245 [2022-01-18 04:58:37,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:58:37,349 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:37,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 221 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:37,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-01-18 04:58:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1113. [2022-01-18 04:58:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.9946043165467624) internal successors, (3330), 1112 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3330 transitions. [2022-01-18 04:58:37,365 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3330 transitions. Word has length 19 [2022-01-18 04:58:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:37,365 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 3330 transitions. [2022-01-18 04:58:37,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3330 transitions. [2022-01-18 04:58:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:37,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:37,366 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:37,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:37,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:37,575 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash -79813965, now seen corresponding path program 300 times [2022-01-18 04:58:37,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:37,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570123721] [2022-01-18 04:58:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:37,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:37,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570123721] [2022-01-18 04:58:37,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570123721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647164443] [2022-01-18 04:58:37,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:37,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:37,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:37,700 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) [2022-01-18 04:58:37,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 04:58:37,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:58:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 04:58:37,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:38,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 04:58:38,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:58:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:38,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:38,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:38,279 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 43 treesize of output 41 [2022-01-18 04:58:38,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:38,284 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 31 treesize of output 29 [2022-01-18 04:58:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:38,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647164443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:38,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:38,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:38,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146799985] [2022-01-18 04:58:38,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:38,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:38,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:38,388 INFO L87 Difference]: Start difference. First operand 1113 states and 3330 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:39,006 INFO L93 Difference]: Finished difference Result 1216 states and 3558 transitions. [2022-01-18 04:58:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:58:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:39,008 INFO L225 Difference]: With dead ends: 1216 [2022-01-18 04:58:39,008 INFO L226 Difference]: Without dead ends: 1214 [2022-01-18 04:58:39,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:58:39,008 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:39,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 181 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-01-18 04:58:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1122. [2022-01-18 04:58:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.9982158786797504) internal successors, (3361), 1121 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3361 transitions. [2022-01-18 04:58:39,020 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3361 transitions. Word has length 19 [2022-01-18 04:58:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:39,020 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 3361 transitions. [2022-01-18 04:58:39,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3361 transitions. [2022-01-18 04:58:39,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:39,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:39,022 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:39,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:39,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:39,222 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:39,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2066356795, now seen corresponding path program 301 times [2022-01-18 04:58:39,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:39,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250283250] [2022-01-18 04:58:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:39,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:39,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:39,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250283250] [2022-01-18 04:58:39,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250283250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:39,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417962563] [2022-01-18 04:58:39,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:39,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:39,349 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) [2022-01-18 04:58:39,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 04:58:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:39,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:39,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:39,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:39,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:39,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-18 04:58:39,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:39,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 27 [2022-01-18 04:58:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:39,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417962563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:39,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:39,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:39,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732228539] [2022-01-18 04:58:39,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:39,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:39,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:39,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:39,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:39,937 INFO L87 Difference]: Start difference. First operand 1122 states and 3361 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:40,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:40,426 INFO L93 Difference]: Finished difference Result 1183 states and 3479 transitions. [2022-01-18 04:58:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:58:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:40,428 INFO L225 Difference]: With dead ends: 1183 [2022-01-18 04:58:40,428 INFO L226 Difference]: Without dead ends: 1183 [2022-01-18 04:58:40,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:58:40,428 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:40,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 125 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-01-18 04:58:40,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1122. [2022-01-18 04:58:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.9946476360392507) internal successors, (3357), 1121 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3357 transitions. [2022-01-18 04:58:40,440 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3357 transitions. Word has length 19 [2022-01-18 04:58:40,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:40,440 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 3357 transitions. [2022-01-18 04:58:40,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:40,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3357 transitions. [2022-01-18 04:58:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:40,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:40,441 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:40,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-01-18 04:58:40,642 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,SelfDestructingSolverStorable309 [2022-01-18 04:58:40,642 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash -121826381, now seen corresponding path program 302 times [2022-01-18 04:58:40,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:40,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286837161] [2022-01-18 04:58:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:40,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:40,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286837161] [2022-01-18 04:58:40,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286837161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499076647] [2022-01-18 04:58:40,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:40,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:40,770 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) [2022-01-18 04:58:40,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 04:58:40,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:40,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:40,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:40,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:41,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:41,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:41,256 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:58:41,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:41,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:58:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:41,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499076647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:41,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:41,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:41,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969217189] [2022-01-18 04:58:41,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:41,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:41,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:41,360 INFO L87 Difference]: Start difference. First operand 1122 states and 3357 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:41,697 INFO L93 Difference]: Finished difference Result 1183 states and 3478 transitions. [2022-01-18 04:58:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:58:41,697 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:41,699 INFO L225 Difference]: With dead ends: 1183 [2022-01-18 04:58:41,699 INFO L226 Difference]: Without dead ends: 1183 [2022-01-18 04:58:41,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:58:41,699 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:41,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 168 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-01-18 04:58:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1115. [2022-01-18 04:58:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.9937163375224416) internal successors, (3335), 1114 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3335 transitions. [2022-01-18 04:58:41,711 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3335 transitions. Word has length 19 [2022-01-18 04:58:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:41,711 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 3335 transitions. [2022-01-18 04:58:41,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3335 transitions. [2022-01-18 04:58:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:41,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:41,712 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:41,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:41,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-01-18 04:58:41,912 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1610128939, now seen corresponding path program 303 times [2022-01-18 04:58:41,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:41,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318991250] [2022-01-18 04:58:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:41,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:42,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318991250] [2022-01-18 04:58:42,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318991250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443612684] [2022-01-18 04:58:42,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:42,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:42,031 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) [2022-01-18 04:58:42,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 04:58:42,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:58:42,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:42,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:42,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:42,383 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 87 treesize of output 71 [2022-01-18 04:58:42,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:58:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:42,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:42,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:42,683 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 42 treesize of output 40 [2022-01-18 04:58:42,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:42,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:58:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:42,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443612684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:42,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:42,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:58:42,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246918485] [2022-01-18 04:58:42,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:42,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:58:42,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:42,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:58:42,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:42,794 INFO L87 Difference]: Start difference. First operand 1115 states and 3335 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:43,802 INFO L93 Difference]: Finished difference Result 1225 states and 3559 transitions. [2022-01-18 04:58:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:58:43,802 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:43,804 INFO L225 Difference]: With dead ends: 1225 [2022-01-18 04:58:43,804 INFO L226 Difference]: Without dead ends: 1223 [2022-01-18 04:58:43,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 04:58:43,804 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 148 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:43,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 213 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-01-18 04:58:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1119. [2022-01-18 04:58:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.993738819320215) internal successors, (3347), 1118 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3347 transitions. [2022-01-18 04:58:43,816 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3347 transitions. Word has length 19 [2022-01-18 04:58:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:43,816 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3347 transitions. [2022-01-18 04:58:43,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3347 transitions. [2022-01-18 04:58:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:43,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:43,817 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:43,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-18 04:58:44,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:44,018 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:44,018 INFO L85 PathProgramCache]: Analyzing trace with hash -554128393, now seen corresponding path program 304 times [2022-01-18 04:58:44,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:44,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963925171] [2022-01-18 04:58:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:44,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:44,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:44,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963925171] [2022-01-18 04:58:44,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963925171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:44,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380088078] [2022-01-18 04:58:44,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:44,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:44,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:44,140 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) [2022-01-18 04:58:44,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 04:58:44,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:44,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:44,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:44,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:44,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:58:44,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:44,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:58:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:44,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380088078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:44,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:44,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:58:44,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210307066] [2022-01-18 04:58:44,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:44,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:58:44,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:58:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:44,791 INFO L87 Difference]: Start difference. First operand 1119 states and 3347 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:45,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:45,718 INFO L93 Difference]: Finished difference Result 1218 states and 3547 transitions. [2022-01-18 04:58:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:58:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:45,720 INFO L225 Difference]: With dead ends: 1218 [2022-01-18 04:58:45,720 INFO L226 Difference]: Without dead ends: 1218 [2022-01-18 04:58:45,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 04:58:45,720 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:45,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 212 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:58:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2022-01-18 04:58:45,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1120. [2022-01-18 04:58:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.993744414655943) internal successors, (3350), 1119 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3350 transitions. [2022-01-18 04:58:45,732 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3350 transitions. Word has length 19 [2022-01-18 04:58:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:45,732 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3350 transitions. [2022-01-18 04:58:45,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3350 transitions. [2022-01-18 04:58:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:45,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:45,733 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:45,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:45,947 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,SelfDestructingSolverStorable312 [2022-01-18 04:58:45,947 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1552655727, now seen corresponding path program 305 times [2022-01-18 04:58:45,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:45,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417917831] [2022-01-18 04:58:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:45,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:46,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:46,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417917831] [2022-01-18 04:58:46,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417917831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:46,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797929385] [2022-01-18 04:58:46,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:46,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:46,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:46,072 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) [2022-01-18 04:58:46,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 04:58:46,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:58:46,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 04:58:46,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:46,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:46,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:46,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 04:58:46,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:46,623 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 31 treesize of output 29 [2022-01-18 04:58:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:46,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797929385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:46,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:46,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 04:58:46,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280173402] [2022-01-18 04:58:46,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:46,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:58:46,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:46,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:58:46,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:58:46,708 INFO L87 Difference]: Start difference. First operand 1120 states and 3350 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:47,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:47,486 INFO L93 Difference]: Finished difference Result 1210 states and 3531 transitions. [2022-01-18 04:58:47,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:58:47,487 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:47,488 INFO L225 Difference]: With dead ends: 1210 [2022-01-18 04:58:47,488 INFO L226 Difference]: Without dead ends: 1210 [2022-01-18 04:58:47,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 04:58:47,489 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:47,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 192 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-01-18 04:58:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1119. [2022-01-18 04:58:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.993738819320215) internal successors, (3347), 1118 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3347 transitions. [2022-01-18 04:58:47,501 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3347 transitions. Word has length 19 [2022-01-18 04:58:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:47,501 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3347 transitions. [2022-01-18 04:58:47,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3347 transitions. [2022-01-18 04:58:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:47,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:47,502 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:47,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:47,702 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,SelfDestructingSolverStorable313 [2022-01-18 04:58:47,702 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1856513289, now seen corresponding path program 306 times [2022-01-18 04:58:47,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:47,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003175155] [2022-01-18 04:58:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:47,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:47,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:47,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003175155] [2022-01-18 04:58:47,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003175155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:47,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910975714] [2022-01-18 04:58:47,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:47,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:47,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:47,819 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) [2022-01-18 04:58:47,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 04:58:47,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:58:47,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:47,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:58:47,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:48,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:48,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:48,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 04:58:48,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:48,345 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 04:58:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:48,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910975714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:48,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:48,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:58:48,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038919261] [2022-01-18 04:58:48,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:48,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:58:48,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:58:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:58:48,431 INFO L87 Difference]: Start difference. First operand 1119 states and 3347 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:48,825 INFO L93 Difference]: Finished difference Result 1186 states and 3479 transitions. [2022-01-18 04:58:48,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:58:48,825 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:48,827 INFO L225 Difference]: With dead ends: 1186 [2022-01-18 04:58:48,827 INFO L226 Difference]: Without dead ends: 1186 [2022-01-18 04:58:48,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:58:48,827 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:48,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 179 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-01-18 04:58:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1115. [2022-01-18 04:58:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.9937163375224416) internal successors, (3335), 1114 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3335 transitions. [2022-01-18 04:58:48,839 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3335 transitions. Word has length 19 [2022-01-18 04:58:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:48,839 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 3335 transitions. [2022-01-18 04:58:48,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3335 transitions. [2022-01-18 04:58:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:48,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:48,840 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:48,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:49,041 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,SelfDestructingSolverStorable314 [2022-01-18 04:58:49,041 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash 705263339, now seen corresponding path program 307 times [2022-01-18 04:58:49,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:49,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332589298] [2022-01-18 04:58:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:49,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:49,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332589298] [2022-01-18 04:58:49,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332589298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951276729] [2022-01-18 04:58:49,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:49,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:49,194 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) [2022-01-18 04:58:49,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 04:58:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:49,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:49,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:49,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:49,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:49,628 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-01-18 04:58:49,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:49,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-01-18 04:58:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:49,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951276729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:49,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:49,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 04:58:49,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800476999] [2022-01-18 04:58:49,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:49,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 04:58:49,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:49,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 04:58:49,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:58:49,729 INFO L87 Difference]: Start difference. First operand 1115 states and 3335 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:50,596 INFO L93 Difference]: Finished difference Result 1277 states and 3670 transitions. [2022-01-18 04:58:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 04:58:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:50,598 INFO L225 Difference]: With dead ends: 1277 [2022-01-18 04:58:50,598 INFO L226 Difference]: Without dead ends: 1277 [2022-01-18 04:58:50,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 04:58:50,599 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 204 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:50,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 307 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:58:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-01-18 04:58:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1116. [2022-01-18 04:58:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.9946188340807174) internal successors, (3339), 1115 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3339 transitions. [2022-01-18 04:58:50,611 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3339 transitions. Word has length 19 [2022-01-18 04:58:50,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:50,611 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 3339 transitions. [2022-01-18 04:58:50,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3339 transitions. [2022-01-18 04:58:50,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:50,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:50,612 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:50,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:50,813 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,SelfDestructingSolverStorable315 [2022-01-18 04:58:50,813 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:50,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1491317359, now seen corresponding path program 308 times [2022-01-18 04:58:50,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:50,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598638566] [2022-01-18 04:58:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:50,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:50,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:50,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598638566] [2022-01-18 04:58:50,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598638566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:50,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481568062] [2022-01-18 04:58:50,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:50,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:50,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:50,950 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) [2022-01-18 04:58:50,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 04:58:51,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:51,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:51,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 04:58:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:51,349 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 104 treesize of output 88 [2022-01-18 04:58:51,350 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 88 treesize of output 72 [2022-01-18 04:58:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:51,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:51,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:51,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2022-01-18 04:58:51,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:51,537 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 53 treesize of output 49 [2022-01-18 04:58:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:51,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481568062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:51,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:51,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:51,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745254710] [2022-01-18 04:58:51,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:51,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:51,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:51,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:51,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:51,707 INFO L87 Difference]: Start difference. First operand 1116 states and 3339 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:52,850 INFO L93 Difference]: Finished difference Result 1342 states and 3811 transitions. [2022-01-18 04:58:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 04:58:52,850 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:52,852 INFO L225 Difference]: With dead ends: 1342 [2022-01-18 04:58:52,852 INFO L226 Difference]: Without dead ends: 1338 [2022-01-18 04:58:52,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=403, Invalid=2459, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 04:58:52,852 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 205 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:52,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 208 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-01-18 04:58:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1120. [2022-01-18 04:58:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.9857015192135834) internal successors, (3341), 1119 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3341 transitions. [2022-01-18 04:58:52,864 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3341 transitions. Word has length 19 [2022-01-18 04:58:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:52,865 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3341 transitions. [2022-01-18 04:58:52,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3341 transitions. [2022-01-18 04:58:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:52,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:52,866 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:52,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:53,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:53,066 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash 647790127, now seen corresponding path program 309 times [2022-01-18 04:58:53,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:53,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572045387] [2022-01-18 04:58:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:53,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:53,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572045387] [2022-01-18 04:58:53,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572045387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404862277] [2022-01-18 04:58:53,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:53,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:53,201 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) [2022-01-18 04:58:53,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 04:58:53,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:58:53,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:53,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 04:58:53,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:53,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-01-18 04:58:53,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-18 04:58:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:53,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:53,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:53,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 59 [2022-01-18 04:58:53,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:53,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2022-01-18 04:58:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:53,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404862277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:53,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:53,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:53,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684282725] [2022-01-18 04:58:53,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:53,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:53,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:53,855 INFO L87 Difference]: Start difference. First operand 1120 states and 3341 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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) [2022-01-18 04:58:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:54,545 INFO L93 Difference]: Finished difference Result 1273 states and 3623 transitions. [2022-01-18 04:58:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:58:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:54,547 INFO L225 Difference]: With dead ends: 1273 [2022-01-18 04:58:54,547 INFO L226 Difference]: Without dead ends: 1271 [2022-01-18 04:58:54,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 04:58:54,547 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 194 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:54,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 295 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-01-18 04:58:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1121. [2022-01-18 04:58:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.9875) internal successors, (3346), 1120 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3346 transitions. [2022-01-18 04:58:54,560 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3346 transitions. Word has length 19 [2022-01-18 04:58:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:54,560 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 3346 transitions. [2022-01-18 04:58:54,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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) [2022-01-18 04:58:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3346 transitions. [2022-01-18 04:58:54,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:54,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:54,561 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:54,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:54,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:54,761 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:54,762 INFO L85 PathProgramCache]: Analyzing trace with hash -696865817, now seen corresponding path program 310 times [2022-01-18 04:58:54,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:54,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36341412] [2022-01-18 04:58:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:54,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:54,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36341412] [2022-01-18 04:58:54,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36341412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624181216] [2022-01-18 04:58:54,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:54,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:54,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:54,898 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) [2022-01-18 04:58:54,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 04:58:54,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:54,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:54,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:58:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:55,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:58:55,200 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 73 treesize of output 57 [2022-01-18 04:58:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:55,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:55,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:55,384 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 34 treesize of output 34 [2022-01-18 04:58:55,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:55,389 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 26 treesize of output 26 [2022-01-18 04:58:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:55,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624181216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:55,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:55,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 04:58:55,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817793945] [2022-01-18 04:58:55,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:55,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 04:58:55,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:55,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 04:58:55,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:58:55,496 INFO L87 Difference]: Start difference. First operand 1121 states and 3346 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:56,506 INFO L93 Difference]: Finished difference Result 1354 states and 3847 transitions. [2022-01-18 04:58:56,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 04:58:56,506 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:56,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:56,508 INFO L225 Difference]: With dead ends: 1354 [2022-01-18 04:58:56,508 INFO L226 Difference]: Without dead ends: 1350 [2022-01-18 04:58:56,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 04:58:56,508 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 204 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:56,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 214 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:58:56,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-01-18 04:58:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1121. [2022-01-18 04:58:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.9857142857142858) internal successors, (3344), 1120 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3344 transitions. [2022-01-18 04:58:56,520 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3344 transitions. Word has length 19 [2022-01-18 04:58:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:56,520 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 3344 transitions. [2022-01-18 04:58:56,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3344 transitions. [2022-01-18 04:58:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:56,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:56,522 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:56,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:56,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:56,722 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1449304943, now seen corresponding path program 311 times [2022-01-18 04:58:56,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:56,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085546203] [2022-01-18 04:58:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:56,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:56,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085546203] [2022-01-18 04:58:56,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085546203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739425683] [2022-01-18 04:58:56,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:56,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:56,864 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) [2022-01-18 04:58:56,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 04:58:56,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:58:56,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:56,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:58:56,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:57,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:57,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:57,333 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 34 treesize of output 34 [2022-01-18 04:58:57,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:57,340 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 26 treesize of output 26 [2022-01-18 04:58:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:57,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739425683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:57,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:57,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:57,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406471358] [2022-01-18 04:58:57,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:57,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:57,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:57,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:57,456 INFO L87 Difference]: Start difference. First operand 1121 states and 3344 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:58,256 INFO L93 Difference]: Finished difference Result 1302 states and 3728 transitions. [2022-01-18 04:58:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:58:58,257 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:58:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:58,258 INFO L225 Difference]: With dead ends: 1302 [2022-01-18 04:58:58,258 INFO L226 Difference]: Without dead ends: 1302 [2022-01-18 04:58:58,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 04:58:58,259 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 131 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:58,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 270 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:58:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-01-18 04:58:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1118. [2022-01-18 04:58:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 2.9838854073410923) internal successors, (3333), 1117 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3333 transitions. [2022-01-18 04:58:58,271 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3333 transitions. Word has length 19 [2022-01-18 04:58:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:58,271 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3333 transitions. [2022-01-18 04:58:58,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:58:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3333 transitions. [2022-01-18 04:58:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:58:58,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:58,272 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:58,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-01-18 04:58:58,473 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,SelfDestructingSolverStorable319 [2022-01-18 04:58:58,473 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:58:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:58,473 INFO L85 PathProgramCache]: Analyzing trace with hash 188932463, now seen corresponding path program 312 times [2022-01-18 04:58:58,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:58,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131926430] [2022-01-18 04:58:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:58,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:58,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:58,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131926430] [2022-01-18 04:58:58,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131926430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:58,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424296849] [2022-01-18 04:58:58,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:58,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:58,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:58,596 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) [2022-01-18 04:58:58,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 04:58:58,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:58:58,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:58,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 04:58:58,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:58,919 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 87 treesize of output 71 [2022-01-18 04:58:58,921 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 71 treesize of output 55 [2022-01-18 04:58:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:59,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:59,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:59,190 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 41 treesize of output 39 [2022-01-18 04:58:59,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:58:59,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 04:58:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:59,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424296849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:59,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:59,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:58:59,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119553756] [2022-01-18 04:58:59,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:59,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:58:59,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:59,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:58:59,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:58:59,287 INFO L87 Difference]: Start difference. First operand 1118 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:00,195 INFO L93 Difference]: Finished difference Result 1309 states and 3735 transitions. [2022-01-18 04:59:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 04:59:00,195 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:00,197 INFO L225 Difference]: With dead ends: 1309 [2022-01-18 04:59:00,197 INFO L226 Difference]: Without dead ends: 1307 [2022-01-18 04:59:00,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=1559, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:59:00,197 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 164 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:00,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 239 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:59:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-01-18 04:59:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1124. [2022-01-18 04:59:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 2.983081032947462) internal successors, (3350), 1123 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3350 transitions. [2022-01-18 04:59:00,210 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3350 transitions. Word has length 19 [2022-01-18 04:59:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:00,210 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 3350 transitions. [2022-01-18 04:59:00,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3350 transitions. [2022-01-18 04:59:00,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:00,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:00,211 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:00,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-01-18 04:59:00,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:00,411 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1959864073, now seen corresponding path program 313 times [2022-01-18 04:59:00,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:00,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735596305] [2022-01-18 04:59:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:00,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:00,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:00,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735596305] [2022-01-18 04:59:00,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735596305] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:00,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719508696] [2022-01-18 04:59:00,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:00,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:00,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:00,534 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) [2022-01-18 04:59:00,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 04:59:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:59:00,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:00,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:01,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:01,034 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 42 treesize of output 40 [2022-01-18 04:59:01,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:01,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:59:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:01,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719508696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:01,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:01,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 04:59:01,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922033917] [2022-01-18 04:59:01,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:01,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 04:59:01,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:01,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 04:59:01,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:59:01,119 INFO L87 Difference]: Start difference. First operand 1124 states and 3350 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:01,898 INFO L93 Difference]: Finished difference Result 1270 states and 3644 transitions. [2022-01-18 04:59:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:59:01,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:01,900 INFO L225 Difference]: With dead ends: 1270 [2022-01-18 04:59:01,900 INFO L226 Difference]: Without dead ends: 1270 [2022-01-18 04:59:01,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:59:01,900 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 127 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:01,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 220 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-01-18 04:59:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1122. [2022-01-18 04:59:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.9812667261373775) internal successors, (3342), 1121 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3342 transitions. [2022-01-18 04:59:01,913 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3342 transitions. Word has length 19 [2022-01-18 04:59:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:01,913 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 3342 transitions. [2022-01-18 04:59:01,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3342 transitions. [2022-01-18 04:59:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:01,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:01,914 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:01,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:02,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:02,115 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:02,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash 146920047, now seen corresponding path program 314 times [2022-01-18 04:59:02,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:02,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129433178] [2022-01-18 04:59:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:02,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:02,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:02,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129433178] [2022-01-18 04:59:02,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129433178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:02,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083632646] [2022-01-18 04:59:02,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:02,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:02,238 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) [2022-01-18 04:59:02,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-18 04:59:02,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:02,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:59:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:02,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:02,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:02,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-18 04:59:02,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:02,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 04:59:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:02,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083632646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:02,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:02,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 04:59:02,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603786749] [2022-01-18 04:59:02,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:02,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 04:59:02,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 04:59:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:59:02,821 INFO L87 Difference]: Start difference. First operand 1122 states and 3342 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:03,250 INFO L93 Difference]: Finished difference Result 1249 states and 3605 transitions. [2022-01-18 04:59:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:59:03,250 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:03,252 INFO L225 Difference]: With dead ends: 1249 [2022-01-18 04:59:03,252 INFO L226 Difference]: Without dead ends: 1249 [2022-01-18 04:59:03,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:59:03,252 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 128 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:03,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 224 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:03,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-01-18 04:59:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1119. [2022-01-18 04:59:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.981216457960644) internal successors, (3333), 1118 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3333 transitions. [2022-01-18 04:59:03,264 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3333 transitions. Word has length 19 [2022-01-18 04:59:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:03,264 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3333 transitions. [2022-01-18 04:59:03,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3333 transitions. [2022-01-18 04:59:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:03,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:03,265 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:03,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:03,465 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,SelfDestructingSolverStorable322 [2022-01-18 04:59:03,466 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:03,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1071435985, now seen corresponding path program 315 times [2022-01-18 04:59:03,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:03,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425660776] [2022-01-18 04:59:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:03,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:03,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:03,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425660776] [2022-01-18 04:59:03,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425660776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:03,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49375689] [2022-01-18 04:59:03,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:03,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:03,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:03,586 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) [2022-01-18 04:59:03,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-18 04:59:03,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:59:03,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 04:59:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:03,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-01-18 04:59:03,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-01-18 04:59:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:04,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:04,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:04,199 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 71 treesize of output 65 [2022-01-18 04:59:04,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:04,206 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 55 treesize of output 49 [2022-01-18 04:59:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:04,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49375689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:04,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:04,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 04:59:04,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429569489] [2022-01-18 04:59:04,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:04,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:59:04,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:04,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:59:04,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:59:04,315 INFO L87 Difference]: Start difference. First operand 1119 states and 3333 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:59:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:04,850 INFO L93 Difference]: Finished difference Result 1286 states and 3627 transitions. [2022-01-18 04:59:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:59:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:04,852 INFO L225 Difference]: With dead ends: 1286 [2022-01-18 04:59:04,852 INFO L226 Difference]: Without dead ends: 1277 [2022-01-18 04:59:04,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:59:04,852 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 251 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:04,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 293 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:59:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-01-18 04:59:04,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1121. [2022-01-18 04:59:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.982142857142857) internal successors, (3340), 1120 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3340 transitions. [2022-01-18 04:59:04,864 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3340 transitions. Word has length 19 [2022-01-18 04:59:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:04,864 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 3340 transitions. [2022-01-18 04:59:04,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-01-18 04:59:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3340 transitions. [2022-01-18 04:59:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:04,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:04,866 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:04,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:05,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 04:59:05,066 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1878875367, now seen corresponding path program 316 times [2022-01-18 04:59:05,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:05,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512982893] [2022-01-18 04:59:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:05,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:05,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:05,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512982893] [2022-01-18 04:59:05,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512982893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:05,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086658985] [2022-01-18 04:59:05,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:05,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:05,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:05,183 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) [2022-01-18 04:59:05,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-18 04:59:05,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:05,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:59:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:05,523 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 87 treesize of output 71 [2022-01-18 04:59:05,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 04:59:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:05,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:05,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:05,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-01-18 04:59:05,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:05,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 27 [2022-01-18 04:59:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:05,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086658985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:05,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:05,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:59:05,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055019102] [2022-01-18 04:59:05,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:05,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:59:05,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:05,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:59:05,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:59:05,848 INFO L87 Difference]: Start difference. First operand 1121 states and 3340 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:06,425 INFO L93 Difference]: Finished difference Result 1215 states and 3531 transitions. [2022-01-18 04:59:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:59:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:06,427 INFO L225 Difference]: With dead ends: 1215 [2022-01-18 04:59:06,427 INFO L226 Difference]: Without dead ends: 1213 [2022-01-18 04:59:06,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:59:06,427 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 152 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:06,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 253 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-01-18 04:59:06,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1125. [2022-01-18 04:59:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.9813167259786475) internal successors, (3351), 1124 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3351 transitions. [2022-01-18 04:59:06,439 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3351 transitions. Word has length 19 [2022-01-18 04:59:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:06,439 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3351 transitions. [2022-01-18 04:59:06,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3351 transitions. [2022-01-18 04:59:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:06,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:06,441 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:06,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-01-18 04:59:06,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:06,641 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:06,641 INFO L85 PathProgramCache]: Analyzing trace with hash -269921169, now seen corresponding path program 317 times [2022-01-18 04:59:06,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:06,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169757291] [2022-01-18 04:59:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:06,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:06,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:06,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169757291] [2022-01-18 04:59:06,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169757291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:06,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10211436] [2022-01-18 04:59:06,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:06,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:06,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:06,763 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) [2022-01-18 04:59:06,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-18 04:59:06,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:59:06,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:06,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:59:06,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:07,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:07,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:07,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:59:07,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:07,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:59:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:07,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10211436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:07,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:07,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:59:07,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567796688] [2022-01-18 04:59:07,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:07,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:59:07,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:59:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:59:07,391 INFO L87 Difference]: Start difference. First operand 1125 states and 3351 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:07,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:07,817 INFO L93 Difference]: Finished difference Result 1209 states and 3525 transitions. [2022-01-18 04:59:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:59:07,817 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:07,819 INFO L225 Difference]: With dead ends: 1209 [2022-01-18 04:59:07,819 INFO L226 Difference]: Without dead ends: 1209 [2022-01-18 04:59:07,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:59:07,819 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 158 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:07,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 177 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:59:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-01-18 04:59:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1128. [2022-01-18 04:59:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 2.981366459627329) internal successors, (3360), 1127 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 3360 transitions. [2022-01-18 04:59:07,832 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 3360 transitions. Word has length 19 [2022-01-18 04:59:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:07,832 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 3360 transitions. [2022-01-18 04:59:07,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 3360 transitions. [2022-01-18 04:59:07,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:07,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:07,834 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:07,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-01-18 04:59:08,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:08,034 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1836862951, now seen corresponding path program 318 times [2022-01-18 04:59:08,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:08,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990394481] [2022-01-18 04:59:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:08,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:08,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:08,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990394481] [2022-01-18 04:59:08,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990394481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:08,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041707634] [2022-01-18 04:59:08,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:08,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:08,151 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) [2022-01-18 04:59:08,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-18 04:59:08,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:59:08,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:59:08,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:08,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:08,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:08,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 04:59:08,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:08,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 04:59:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:08,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041707634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:08,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:08,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:59:08,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785461742] [2022-01-18 04:59:08,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:08,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:59:08,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:08,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:59:08,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:59:08,773 INFO L87 Difference]: Start difference. First operand 1128 states and 3360 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:09,240 INFO L93 Difference]: Finished difference Result 1221 states and 3549 transitions. [2022-01-18 04:59:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:59:09,240 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:09,242 INFO L225 Difference]: With dead ends: 1221 [2022-01-18 04:59:09,242 INFO L226 Difference]: Without dead ends: 1221 [2022-01-18 04:59:09,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:59:09,242 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:09,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 210 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-01-18 04:59:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1125. [2022-01-18 04:59:09,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.9813167259786475) internal successors, (3351), 1124 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3351 transitions. [2022-01-18 04:59:09,254 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3351 transitions. Word has length 19 [2022-01-18 04:59:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:09,254 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3351 transitions. [2022-01-18 04:59:09,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3351 transitions. [2022-01-18 04:59:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:09,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:09,255 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:09,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-01-18 04:59:09,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:09,456 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1572306065, now seen corresponding path program 319 times [2022-01-18 04:59:09,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:09,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529253162] [2022-01-18 04:59:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:09,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:09,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:09,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529253162] [2022-01-18 04:59:09,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529253162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:09,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077677373] [2022-01-18 04:59:09,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:09,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:09,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:09,567 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) [2022-01-18 04:59:09,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-18 04:59:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:09,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:59:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:09,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:10,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:10,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 04:59:10,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:10,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 04:59:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:10,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077677373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:10,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:10,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:59:10,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147017321] [2022-01-18 04:59:10,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:10,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:59:10,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:10,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:59:10,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:59:10,165 INFO L87 Difference]: Start difference. First operand 1125 states and 3351 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:10,636 INFO L93 Difference]: Finished difference Result 1208 states and 3522 transitions. [2022-01-18 04:59:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:59:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:10,637 INFO L225 Difference]: With dead ends: 1208 [2022-01-18 04:59:10,637 INFO L226 Difference]: Without dead ends: 1208 [2022-01-18 04:59:10,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:59:10,638 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:10,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 226 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-01-18 04:59:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1121. [2022-01-18 04:59:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.98125) internal successors, (3339), 1120 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3339 transitions. [2022-01-18 04:59:10,650 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3339 transitions. Word has length 19 [2022-01-18 04:59:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:10,650 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 3339 transitions. [2022-01-18 04:59:10,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3339 transitions. [2022-01-18 04:59:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:10,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:10,651 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:10,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-01-18 04:59:10,851 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,SelfDestructingSolverStorable327 [2022-01-18 04:59:10,852 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1991780693, now seen corresponding path program 320 times [2022-01-18 04:59:10,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:10,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323282292] [2022-01-18 04:59:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:10,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:10,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:10,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323282292] [2022-01-18 04:59:10,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323282292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:10,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690454224] [2022-01-18 04:59:10,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:10,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:10,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:10,964 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) [2022-01-18 04:59:10,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-18 04:59:11,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:11,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:11,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:59:11,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:11,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 04:59:11,309 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 73 treesize of output 57 [2022-01-18 04:59:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:11,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:11,578 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:11,578 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 30 treesize of output 25 [2022-01-18 04:59:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:11,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690454224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:11,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:11,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:59:11,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809400936] [2022-01-18 04:59:11,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:11,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:59:11,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:59:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:59:11,616 INFO L87 Difference]: Start difference. First operand 1121 states and 3339 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:12,423 INFO L93 Difference]: Finished difference Result 1286 states and 3690 transitions. [2022-01-18 04:59:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:59:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:12,425 INFO L225 Difference]: With dead ends: 1286 [2022-01-18 04:59:12,425 INFO L226 Difference]: Without dead ends: 1284 [2022-01-18 04:59:12,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=1716, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:59:12,425 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 175 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:12,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 279 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:12,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-01-18 04:59:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1124. [2022-01-18 04:59:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 2.9821905609973287) internal successors, (3349), 1123 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3349 transitions. [2022-01-18 04:59:12,438 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3349 transitions. Word has length 19 [2022-01-18 04:59:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:12,438 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 3349 transitions. [2022-01-18 04:59:12,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3349 transitions. [2022-01-18 04:59:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:12,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:12,439 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:12,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-01-18 04:59:12,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:12,639 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:12,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash 154390067, now seen corresponding path program 321 times [2022-01-18 04:59:12,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:12,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10283783] [2022-01-18 04:59:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:12,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:12,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10283783] [2022-01-18 04:59:12,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10283783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177841857] [2022-01-18 04:59:12,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:12,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:12,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:12,762 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) [2022-01-18 04:59:12,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-18 04:59:12,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:59:12,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:12,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:59:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:13,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:13,426 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:13,426 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 31 treesize of output 26 [2022-01-18 04:59:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:13,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177841857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:13,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:13,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 04:59:13,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794573764] [2022-01-18 04:59:13,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:13,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 04:59:13,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 04:59:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:59:13,485 INFO L87 Difference]: Start difference. First operand 1124 states and 3349 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-01-18 04:59:17,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:17,442 INFO L93 Difference]: Finished difference Result 2337 states and 6563 transitions. [2022-01-18 04:59:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 04:59:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:17,445 INFO L225 Difference]: With dead ends: 2337 [2022-01-18 04:59:17,445 INFO L226 Difference]: Without dead ends: 2322 [2022-01-18 04:59:17,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=985, Invalid=4867, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 04:59:17,446 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 424 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:17,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 410 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:59:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-01-18 04:59:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1248. [2022-01-18 04:59:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.0352846832397753) internal successors, (3785), 1247 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3785 transitions. [2022-01-18 04:59:17,463 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3785 transitions. Word has length 19 [2022-01-18 04:59:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:17,463 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3785 transitions. [2022-01-18 04:59:17,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-01-18 04:59:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3785 transitions. [2022-01-18 04:59:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:17,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:17,465 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:17,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-01-18 04:59:17,665 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,SelfDestructingSolverStorable329 [2022-01-18 04:59:17,665 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2033793109, now seen corresponding path program 322 times [2022-01-18 04:59:17,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:17,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333725394] [2022-01-18 04:59:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:17,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:17,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:17,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333725394] [2022-01-18 04:59:17,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333725394] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:17,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38836995] [2022-01-18 04:59:17,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:17,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:17,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:17,785 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) [2022-01-18 04:59:17,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-18 04:59:17,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:17,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:17,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:59:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:18,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:18,334 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:18,334 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 31 treesize of output 26 [2022-01-18 04:59:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:18,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38836995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:18,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:18,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:59:18,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332038300] [2022-01-18 04:59:18,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:18,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:59:18,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:59:18,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:59:18,373 INFO L87 Difference]: Start difference. First operand 1248 states and 3785 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:19,063 INFO L93 Difference]: Finished difference Result 1371 states and 3999 transitions. [2022-01-18 04:59:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:59:19,064 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:19,065 INFO L225 Difference]: With dead ends: 1371 [2022-01-18 04:59:19,065 INFO L226 Difference]: Without dead ends: 1371 [2022-01-18 04:59:19,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:59:19,066 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 153 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:19,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 259 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-01-18 04:59:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1241. [2022-01-18 04:59:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.0346774193548387) internal successors, (3763), 1240 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 3763 transitions. [2022-01-18 04:59:19,079 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 3763 transitions. Word has length 19 [2022-01-18 04:59:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:19,079 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 3763 transitions. [2022-01-18 04:59:19,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 3763 transitions. [2022-01-18 04:59:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:19,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:19,080 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:19,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-01-18 04:59:19,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:19,281 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:19,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1147994829, now seen corresponding path program 323 times [2022-01-18 04:59:19,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:19,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951506300] [2022-01-18 04:59:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:19,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:19,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:19,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951506300] [2022-01-18 04:59:19,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951506300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:19,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625850396] [2022-01-18 04:59:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:19,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:19,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:19,391 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) [2022-01-18 04:59:19,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-18 04:59:19,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:59:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:19,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 04:59:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:19,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:19,923 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:19,924 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 30 treesize of output 25 [2022-01-18 04:59:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:19,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625850396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:19,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:19,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 04:59:19,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426956098] [2022-01-18 04:59:19,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:19,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:59:19,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:19,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:59:19,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:59:19,963 INFO L87 Difference]: Start difference. First operand 1241 states and 3763 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:20,726 INFO L93 Difference]: Finished difference Result 1384 states and 4025 transitions. [2022-01-18 04:59:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:59:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:20,728 INFO L225 Difference]: With dead ends: 1384 [2022-01-18 04:59:20,728 INFO L226 Difference]: Without dead ends: 1384 [2022-01-18 04:59:20,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:59:20,728 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 141 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:20,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 321 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-01-18 04:59:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1236. [2022-01-18 04:59:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0340080971659917) internal successors, (3747), 1235 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3747 transitions. [2022-01-18 04:59:20,741 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3747 transitions. Word has length 19 [2022-01-18 04:59:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:20,742 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 3747 transitions. [2022-01-18 04:59:20,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3747 transitions. [2022-01-18 04:59:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:59:20,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:20,743 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:20,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-01-18 04:59:20,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-01-18 04:59:20,943 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash -303023377, now seen corresponding path program 324 times [2022-01-18 04:59:20,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:20,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070505740] [2022-01-18 04:59:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:20,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:21,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:21,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070505740] [2022-01-18 04:59:21,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070505740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:21,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959515666] [2022-01-18 04:59:21,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:21,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:21,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:21,047 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) [2022-01-18 04:59:21,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-18 04:59:21,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:59:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 04:59:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:21,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:21,480 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:21,480 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 30 treesize of output 25 [2022-01-18 04:59:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:21,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959515666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:21,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:21,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 04:59:21,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728468566] [2022-01-18 04:59:21,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:21,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:59:21,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:59:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:59:21,514 INFO L87 Difference]: Start difference. First operand 1236 states and 3747 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:21,799 INFO L93 Difference]: Finished difference Result 1358 states and 3971 transitions. [2022-01-18 04:59:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:59:21,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 04:59:21,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:21,801 INFO L225 Difference]: With dead ends: 1358 [2022-01-18 04:59:21,801 INFO L226 Difference]: Without dead ends: 1358 [2022-01-18 04:59:21,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:59:21,802 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 125 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:21,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 267 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-01-18 04:59:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1236. [2022-01-18 04:59:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0340080971659917) internal successors, (3747), 1235 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3747 transitions. [2022-01-18 04:59:21,816 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3747 transitions. Word has length 19 [2022-01-18 04:59:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:21,816 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 3747 transitions. [2022-01-18 04:59:21,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3747 transitions. [2022-01-18 04:59:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:21,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:21,817 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:21,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:22,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-01-18 04:59:22,018 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:22,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:22,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1843506877, now seen corresponding path program 325 times [2022-01-18 04:59:22,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:22,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502086714] [2022-01-18 04:59:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:22,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:22,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:22,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502086714] [2022-01-18 04:59:22,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502086714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:22,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610859766] [2022-01-18 04:59:22,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:22,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:22,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:22,439 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) [2022-01-18 04:59:22,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-18 04:59:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:22,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 04:59:22,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:22,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:59:22,957 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 59 treesize of output 47 [2022-01-18 04:59:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:23,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:23,489 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:23,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 118 [2022-01-18 04:59:23,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-01-18 04:59:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:23,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610859766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:23,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:23,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 04:59:23,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257196597] [2022-01-18 04:59:23,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:23,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 04:59:23,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 04:59:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:59:23,644 INFO L87 Difference]: Start difference. First operand 1236 states and 3747 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 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) [2022-01-18 04:59:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:24,177 INFO L93 Difference]: Finished difference Result 1477 states and 4392 transitions. [2022-01-18 04:59:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:59:24,177 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 04:59:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:24,179 INFO L225 Difference]: With dead ends: 1477 [2022-01-18 04:59:24,179 INFO L226 Difference]: Without dead ends: 1458 [2022-01-18 04:59:24,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:59:24,179 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 152 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:24,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 231 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2022-01-18 04:59:24,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1237. [2022-01-18 04:59:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 3.0331715210355985) internal successors, (3749), 1236 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 3749 transitions. [2022-01-18 04:59:24,203 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 3749 transitions. Word has length 20 [2022-01-18 04:59:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:24,203 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 3749 transitions. [2022-01-18 04:59:24,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 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) [2022-01-18 04:59:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 3749 transitions. [2022-01-18 04:59:24,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:24,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:24,205 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:24,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:24,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-01-18 04:59:24,405 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash -328414905, now seen corresponding path program 326 times [2022-01-18 04:59:24,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:24,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466711872] [2022-01-18 04:59:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:24,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:24,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:24,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466711872] [2022-01-18 04:59:24,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466711872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:24,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489669650] [2022-01-18 04:59:24,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:24,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:24,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:24,786 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) [2022-01-18 04:59:24,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-18 04:59:24,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:24,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:24,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 04:59:24,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:25,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-01-18 04:59:25,349 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 57 treesize of output 45 [2022-01-18 04:59:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:25,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:25,998 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:25,998 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 94 treesize of output 81 [2022-01-18 04:59:26,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2022-01-18 04:59:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:26,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489669650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:26,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:26,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 04:59:26,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044805810] [2022-01-18 04:59:26,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:26,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 04:59:26,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 04:59:26,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:59:26,094 INFO L87 Difference]: Start difference. First operand 1237 states and 3749 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 04:59:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:27,989 INFO L93 Difference]: Finished difference Result 1720 states and 5058 transitions. [2022-01-18 04:59:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:59:27,989 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 04:59:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:27,992 INFO L225 Difference]: With dead ends: 1720 [2022-01-18 04:59:27,992 INFO L226 Difference]: Without dead ends: 1682 [2022-01-18 04:59:27,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=423, Invalid=2883, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 04:59:27,992 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 232 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:27,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 330 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:59:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-01-18 04:59:28,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1247. [2022-01-18 04:59:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.030497592295345) internal successors, (3776), 1246 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 3776 transitions. [2022-01-18 04:59:28,008 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 3776 transitions. Word has length 20 [2022-01-18 04:59:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:28,008 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 3776 transitions. [2022-01-18 04:59:28,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 04:59:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 3776 transitions. [2022-01-18 04:59:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:28,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:28,009 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:28,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-01-18 04:59:28,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:28,210 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:28,210 INFO L85 PathProgramCache]: Analyzing trace with hash 944518803, now seen corresponding path program 327 times [2022-01-18 04:59:28,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:28,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651254714] [2022-01-18 04:59:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:28,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:28,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:28,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651254714] [2022-01-18 04:59:28,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651254714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:28,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827426999] [2022-01-18 04:59:28,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:28,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:28,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:28,457 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) [2022-01-18 04:59:28,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-18 04:59:28,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:59:28,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:28,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 04:59:28,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:29,044 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 71 treesize of output 59 [2022-01-18 04:59:29,045 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 59 treesize of output 47 [2022-01-18 04:59:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:29,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:29,557 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:59:29,557 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 117 [2022-01-18 04:59:29,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:59:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:29,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827426999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:29,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:29,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 04:59:29,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273918446] [2022-01-18 04:59:29,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:29,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 04:59:29,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 04:59:29,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:59:29,709 INFO L87 Difference]: Start difference. First operand 1247 states and 3776 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:31,381 INFO L93 Difference]: Finished difference Result 1419 states and 4133 transitions. [2022-01-18 04:59:31,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:59:31,381 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 04:59:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:31,383 INFO L225 Difference]: With dead ends: 1419 [2022-01-18 04:59:31,383 INFO L226 Difference]: Without dead ends: 1388 [2022-01-18 04:59:31,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=287, Invalid=2469, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 04:59:31,384 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 237 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:31,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 471 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:59:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-01-18 04:59:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1252. [2022-01-18 04:59:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.027178257394085) internal successors, (3787), 1251 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 3787 transitions. [2022-01-18 04:59:31,397 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 3787 transitions. Word has length 20 [2022-01-18 04:59:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 1252 states and 3787 transitions. [2022-01-18 04:59:31,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 3787 transitions. [2022-01-18 04:59:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:31,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:31,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:31,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-01-18 04:59:31,598 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,SelfDestructingSolverStorable335 [2022-01-18 04:59:31,598 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash -84785389, now seen corresponding path program 328 times [2022-01-18 04:59:31,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:31,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788130776] [2022-01-18 04:59:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:31,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:31,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:31,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788130776] [2022-01-18 04:59:31,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788130776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:31,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46086098] [2022-01-18 04:59:31,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:31,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:31,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:31,915 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) [2022-01-18 04:59:31,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-18 04:59:31,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:31,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 04:59:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:32,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 04:59:32,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 45 [2022-01-18 04:59:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:32,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:33,567 INFO L353 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2022-01-18 04:59:33,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 80 [2022-01-18 04:59:33,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:59:33,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:59:33,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:33,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 49 [2022-01-18 04:59:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:33,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46086098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:33,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:33,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 04:59:33,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195085184] [2022-01-18 04:59:33,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:33,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 04:59:33,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:33,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 04:59:33,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:59:33,628 INFO L87 Difference]: Start difference. First operand 1252 states and 3787 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:35,628 INFO L93 Difference]: Finished difference Result 1386 states and 4086 transitions. [2022-01-18 04:59:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:59:35,629 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 04:59:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:35,630 INFO L225 Difference]: With dead ends: 1386 [2022-01-18 04:59:35,630 INFO L226 Difference]: Without dead ends: 1365 [2022-01-18 04:59:35,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=279, Invalid=2477, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 04:59:35,631 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 182 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:35,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 340 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:59:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-01-18 04:59:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1253. [2022-01-18 04:59:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.02555910543131) internal successors, (3788), 1252 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3788 transitions. [2022-01-18 04:59:35,644 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3788 transitions. Word has length 20 [2022-01-18 04:59:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:35,644 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 3788 transitions. [2022-01-18 04:59:35,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3788 transitions. [2022-01-18 04:59:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:35,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:35,646 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:35,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:35,846 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,SelfDestructingSolverStorable336 [2022-01-18 04:59:35,846 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:35,846 INFO L85 PathProgramCache]: Analyzing trace with hash -51186161, now seen corresponding path program 329 times [2022-01-18 04:59:35,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:35,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948752442] [2022-01-18 04:59:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:35,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:36,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:36,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948752442] [2022-01-18 04:59:36,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948752442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:36,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469755344] [2022-01-18 04:59:36,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:36,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:36,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:36,144 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) [2022-01-18 04:59:36,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-18 04:59:36,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:59:36,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:36,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 04:59:36,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:36,798 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 69 treesize of output 57 [2022-01-18 04:59:36,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 45 [2022-01-18 04:59:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:36,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:37,490 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:59:37,490 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 147 treesize of output 120 [2022-01-18 04:59:37,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:59:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:37,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469755344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:37,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:37,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 04:59:37,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438164497] [2022-01-18 04:59:37,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:37,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 04:59:37,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:37,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 04:59:37,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:59:37,644 INFO L87 Difference]: Start difference. First operand 1253 states and 3788 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:40,784 INFO L93 Difference]: Finished difference Result 1486 states and 4263 transitions. [2022-01-18 04:59:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 04:59:40,784 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 04:59:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:40,786 INFO L225 Difference]: With dead ends: 1486 [2022-01-18 04:59:40,786 INFO L226 Difference]: Without dead ends: 1447 [2022-01-18 04:59:40,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=555, Invalid=3605, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 04:59:40,786 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 405 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:40,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 505 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:59:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2022-01-18 04:59:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1261. [2022-01-18 04:59:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.0253968253968253) internal successors, (3812), 1260 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3812 transitions. [2022-01-18 04:59:40,800 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3812 transitions. Word has length 20 [2022-01-18 04:59:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:40,800 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 3812 transitions. [2022-01-18 04:59:40,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3812 transitions. [2022-01-18 04:59:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:40,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:40,801 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:40,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-01-18 04:59:41,002 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,SelfDestructingSolverStorable337 [2022-01-18 04:59:41,002 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash 563581447, now seen corresponding path program 330 times [2022-01-18 04:59:41,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:41,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103864191] [2022-01-18 04:59:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:41,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:41,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:41,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103864191] [2022-01-18 04:59:41,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103864191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:41,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147298594] [2022-01-18 04:59:41,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:41,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:41,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:41,377 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) [2022-01-18 04:59:41,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-18 04:59:41,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:59:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:41,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 04:59:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:41,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:59:41,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:59:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:42,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:42,487 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:59:42,487 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 144 treesize of output 117 [2022-01-18 04:59:42,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:59:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:42,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147298594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:42,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:42,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 04:59:42,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374226510] [2022-01-18 04:59:42,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:42,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 04:59:42,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:42,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 04:59:42,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:59:42,680 INFO L87 Difference]: Start difference. First operand 1261 states and 3812 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:44,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:44,155 INFO L93 Difference]: Finished difference Result 1480 states and 4280 transitions. [2022-01-18 04:59:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:59:44,155 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 04:59:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:44,157 INFO L225 Difference]: With dead ends: 1480 [2022-01-18 04:59:44,157 INFO L226 Difference]: Without dead ends: 1450 [2022-01-18 04:59:44,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=316, Invalid=2990, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 04:59:44,157 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 132 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:44,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 487 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:59:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2022-01-18 04:59:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1278. [2022-01-18 04:59:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.0266249021143303) internal successors, (3865), 1277 states have internal predecessors, (3865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 3865 transitions. [2022-01-18 04:59:44,180 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 3865 transitions. Word has length 20 [2022-01-18 04:59:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:44,180 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 3865 transitions. [2022-01-18 04:59:44,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 3865 transitions. [2022-01-18 04:59:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:44,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:44,181 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:44,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-01-18 04:59:44,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:44,382 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:44,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:44,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1605157515, now seen corresponding path program 331 times [2022-01-18 04:59:44,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:44,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673726785] [2022-01-18 04:59:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:44,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:44,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:44,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673726785] [2022-01-18 04:59:44,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673726785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:44,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355095515] [2022-01-18 04:59:44,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:44,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:44,774 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) [2022-01-18 04:59:44,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-18 04:59:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:44,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 04:59:44,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:45,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 04:59:45,389 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 61 treesize of output 49 [2022-01-18 04:59:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:45,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:45,931 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:59:45,931 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 147 treesize of output 120 [2022-01-18 04:59:45,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 04:59:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:46,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355095515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:46,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:46,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 04:59:46,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557375640] [2022-01-18 04:59:46,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:46,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 04:59:46,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:46,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 04:59:46,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:59:46,112 INFO L87 Difference]: Start difference. First operand 1278 states and 3865 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:47,720 INFO L93 Difference]: Finished difference Result 1474 states and 4272 transitions. [2022-01-18 04:59:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:59:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 04:59:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:47,723 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 04:59:47,723 INFO L226 Difference]: Without dead ends: 1454 [2022-01-18 04:59:47,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=315, Invalid=2877, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 04:59:47,723 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 158 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:47,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 542 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:59:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-01-18 04:59:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1281. [2022-01-18 04:59:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.02578125) internal successors, (3873), 1280 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3873 transitions. [2022-01-18 04:59:47,737 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3873 transitions. Word has length 20 [2022-01-18 04:59:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:47,737 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 3873 transitions. [2022-01-18 04:59:47,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3873 transitions. [2022-01-18 04:59:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:47,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:47,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:47,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:47,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:47,939 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1638756743, now seen corresponding path program 332 times [2022-01-18 04:59:47,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:47,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644368069] [2022-01-18 04:59:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:47,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:48,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:48,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644368069] [2022-01-18 04:59:48,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644368069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:48,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320543273] [2022-01-18 04:59:48,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:48,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:48,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:48,299 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) [2022-01-18 04:59:48,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-18 04:59:48,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:48,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 04:59:48,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:48,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 04:59:48,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 04:59:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:49,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:49,510 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:59:49,510 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 144 treesize of output 117 [2022-01-18 04:59:49,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:59:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:49,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320543273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:49,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:49,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 04:59:49,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777676220] [2022-01-18 04:59:49,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:49,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 04:59:49,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:49,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 04:59:49,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:59:49,691 INFO L87 Difference]: Start difference. First operand 1281 states and 3873 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:52,360 INFO L93 Difference]: Finished difference Result 1557 states and 4429 transitions. [2022-01-18 04:59:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 04:59:52,360 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 04:59:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:52,362 INFO L225 Difference]: With dead ends: 1557 [2022-01-18 04:59:52,362 INFO L226 Difference]: Without dead ends: 1525 [2022-01-18 04:59:52,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=441, Invalid=3981, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 04:59:52,363 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 236 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:52,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 504 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:59:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-01-18 04:59:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1285. [2022-01-18 04:59:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.0249221183800623) internal successors, (3884), 1284 states have internal predecessors, (3884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3884 transitions. [2022-01-18 04:59:52,377 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3884 transitions. Word has length 20 [2022-01-18 04:59:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:52,377 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 3884 transitions. [2022-01-18 04:59:52,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3884 transitions. [2022-01-18 04:59:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:52,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:52,378 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:52,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:52,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:52,578 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:52,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash -576916725, now seen corresponding path program 333 times [2022-01-18 04:59:52,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:52,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552102190] [2022-01-18 04:59:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:52,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:52,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:52,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552102190] [2022-01-18 04:59:52,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552102190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:52,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875950935] [2022-01-18 04:59:52,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:52,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:52,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:52,875 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) [2022-01-18 04:59:52,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-01-18 04:59:52,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:59:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:52,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 04:59:52,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:53,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-01-18 04:59:53,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-18 04:59:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:53,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:54,407 INFO L353 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2022-01-18 04:59:54,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 83 [2022-01-18 04:59:54,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:59:54,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:59:54,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:54,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 52 [2022-01-18 04:59:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:54,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875950935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:54,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:54,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 04:59:54,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733944331] [2022-01-18 04:59:54,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:54,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 04:59:54,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:54,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 04:59:54,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:59:54,497 INFO L87 Difference]: Start difference. First operand 1285 states and 3884 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:57,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:57,265 INFO L93 Difference]: Finished difference Result 1590 states and 4475 transitions. [2022-01-18 04:59:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 04:59:57,265 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 04:59:57,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:57,267 INFO L225 Difference]: With dead ends: 1590 [2022-01-18 04:59:57,267 INFO L226 Difference]: Without dead ends: 1543 [2022-01-18 04:59:57,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=415, Invalid=3875, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 04:59:57,267 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 177 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:57,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 448 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 04:59:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2022-01-18 04:59:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1291. [2022-01-18 04:59:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.024806201550388) internal successors, (3902), 1290 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:59:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3902 transitions. [2022-01-18 04:59:57,282 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3902 transitions. Word has length 20 [2022-01-18 04:59:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:57,282 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 3902 transitions. [2022-01-18 04:59:57,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 04:59:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3902 transitions. [2022-01-18 04:59:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:57,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:57,283 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:57,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-01-18 04:59:57,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:57,484 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:59:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1804011501, now seen corresponding path program 334 times [2022-01-18 04:59:57,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:57,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499905198] [2022-01-18 04:59:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:57,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:57,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:57,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499905198] [2022-01-18 04:59:57,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499905198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:57,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626918253] [2022-01-18 04:59:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:57,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:57,807 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) [2022-01-18 04:59:57,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-01-18 04:59:57,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:57,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 04:59:57,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:58,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 04:59:58,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 04:59:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:58,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:58,797 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 04:59:58,798 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 144 treesize of output 117 [2022-01-18 04:59:58,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 04:59:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:59,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626918253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:59,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:59,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 04:59:59,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292097501] [2022-01-18 04:59:59,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:59,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 04:59:59,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 04:59:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:59:59,011 INFO L87 Difference]: Start difference. First operand 1291 states and 3902 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:00,569 INFO L93 Difference]: Finished difference Result 1601 states and 4582 transitions. [2022-01-18 05:00:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:00:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:00,571 INFO L225 Difference]: With dead ends: 1601 [2022-01-18 05:00:00,571 INFO L226 Difference]: Without dead ends: 1581 [2022-01-18 05:00:00,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=390, Invalid=3392, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:00:00,572 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 239 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:00,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 508 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:00:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2022-01-18 05:00:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1330. [2022-01-18 05:00:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.0278404815650863) internal successors, (4024), 1329 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4024 transitions. [2022-01-18 05:00:00,586 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4024 transitions. Word has length 20 [2022-01-18 05:00:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:00,586 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 4024 transitions. [2022-01-18 05:00:00,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4024 transitions. [2022-01-18 05:00:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:00,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:00,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:00,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:00,788 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,SelfDestructingSolverStorable342 [2022-01-18 05:00:00,788 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:00,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1770412273, now seen corresponding path program 335 times [2022-01-18 05:00:00,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:00,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417139044] [2022-01-18 05:00:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:00,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:01,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:01,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417139044] [2022-01-18 05:00:01,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417139044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:01,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869252135] [2022-01-18 05:00:01,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:01,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:01,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:01,032 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) [2022-01-18 05:00:01,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-01-18 05:00:01,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:00:01,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:01,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:00:01,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:01,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 05:00:01,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:00:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:01,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:02,073 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:00:02,073 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 144 treesize of output 117 [2022-01-18 05:00:02,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 05:00:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:02,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869252135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:02,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:02,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 05:00:02,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251659466] [2022-01-18 05:00:02,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:02,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:00:02,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:02,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:00:02,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:00:02,278 INFO L87 Difference]: Start difference. First operand 1330 states and 4024 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:04,670 INFO L93 Difference]: Finished difference Result 1664 states and 4714 transitions. [2022-01-18 05:00:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:00:04,670 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:04,672 INFO L225 Difference]: With dead ends: 1664 [2022-01-18 05:00:04,672 INFO L226 Difference]: Without dead ends: 1639 [2022-01-18 05:00:04,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=431, Invalid=4399, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 05:00:04,673 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 215 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:04,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 468 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:00:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-01-18 05:00:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1335. [2022-01-18 05:00:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.028485757121439) internal successors, (4040), 1334 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4040 transitions. [2022-01-18 05:00:04,688 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4040 transitions. Word has length 20 [2022-01-18 05:00:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:04,688 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 4040 transitions. [2022-01-18 05:00:04,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4040 transitions. [2022-01-18 05:00:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:04,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:04,690 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:04,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-01-18 05:00:04,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-01-18 05:00:04,890 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash 308881555, now seen corresponding path program 336 times [2022-01-18 05:00:04,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:04,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122619439] [2022-01-18 05:00:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:04,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:05,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:05,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122619439] [2022-01-18 05:00:05,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122619439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:05,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150175269] [2022-01-18 05:00:05,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:05,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:05,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:05,133 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) [2022-01-18 05:00:05,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-01-18 05:00:05,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:00:05,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:05,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:00:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:05,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 90 [2022-01-18 05:00:05,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 05:00:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:05,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:06,240 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:00:06,241 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 143 treesize of output 116 [2022-01-18 05:00:06,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-01-18 05:00:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:06,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150175269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:06,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:06,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 05:00:06,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367840413] [2022-01-18 05:00:06,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:06,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:00:06,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:00:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:00:06,451 INFO L87 Difference]: Start difference. First operand 1335 states and 4040 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:08,792 INFO L93 Difference]: Finished difference Result 1675 states and 4747 transitions. [2022-01-18 05:00:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 05:00:08,792 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:08,794 INFO L225 Difference]: With dead ends: 1675 [2022-01-18 05:00:08,794 INFO L226 Difference]: Without dead ends: 1643 [2022-01-18 05:00:08,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=484, Invalid=4486, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 05:00:08,795 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 260 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:08,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 586 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1959 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:00:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-01-18 05:00:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1327. [2022-01-18 05:00:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.0233785822021115) internal successors, (4009), 1326 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4009 transitions. [2022-01-18 05:00:08,810 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4009 transitions. Word has length 20 [2022-01-18 05:00:08,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:08,810 INFO L470 AbstractCegarLoop]: Abstraction has 1327 states and 4009 transitions. [2022-01-18 05:00:08,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4009 transitions. [2022-01-18 05:00:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:08,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:08,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:08,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:09,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-01-18 05:00:09,012 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 336371847, now seen corresponding path program 337 times [2022-01-18 05:00:09,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:09,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507089878] [2022-01-18 05:00:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:09,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:09,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507089878] [2022-01-18 05:00:09,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507089878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513488799] [2022-01-18 05:00:09,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:09,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:09,355 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) [2022-01-18 05:00:09,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-01-18 05:00:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:09,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:00:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:09,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 05:00:09,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:00:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:10,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:10,365 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:00:10,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 05:00:10,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 05:00:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:10,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513488799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:10,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:10,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 05:00:10,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134010497] [2022-01-18 05:00:10,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:10,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:00:10,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:00:10,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:00:10,597 INFO L87 Difference]: Start difference. First operand 1327 states and 4009 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:13,491 INFO L93 Difference]: Finished difference Result 1743 states and 4896 transitions. [2022-01-18 05:00:13,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:00:13,492 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:13,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:13,494 INFO L225 Difference]: With dead ends: 1743 [2022-01-18 05:00:13,494 INFO L226 Difference]: Without dead ends: 1711 [2022-01-18 05:00:13,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=652, Invalid=6320, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 05:00:13,495 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 276 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:13,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 548 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2173 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:00:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2022-01-18 05:00:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1349. [2022-01-18 05:00:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.0229970326409497) internal successors, (4075), 1348 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4075 transitions. [2022-01-18 05:00:13,511 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4075 transitions. Word has length 20 [2022-01-18 05:00:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:13,511 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 4075 transitions. [2022-01-18 05:00:13,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4075 transitions. [2022-01-18 05:00:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:13,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:13,513 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:13,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:13,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-01-18 05:00:13,713 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:13,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1879301621, now seen corresponding path program 338 times [2022-01-18 05:00:13,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:13,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970643071] [2022-01-18 05:00:13,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:13,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:13,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:13,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970643071] [2022-01-18 05:00:13,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970643071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:13,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144540277] [2022-01-18 05:00:13,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:13,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:13,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:13,937 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) [2022-01-18 05:00:13,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-01-18 05:00:14,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:14,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:14,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:00:14,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:14,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 05:00:14,448 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 83 treesize of output 67 [2022-01-18 05:00:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:14,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:15,031 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:00:15,031 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 108 treesize of output 95 [2022-01-18 05:00:15,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2022-01-18 05:00:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:15,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144540277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:15,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:15,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 05:00:15,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505055399] [2022-01-18 05:00:15,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:15,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:00:15,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:00:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:00:15,257 INFO L87 Difference]: Start difference. First operand 1349 states and 4075 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:18,502 INFO L93 Difference]: Finished difference Result 1806 states and 5025 transitions. [2022-01-18 05:00:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:00:18,503 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:18,505 INFO L225 Difference]: With dead ends: 1806 [2022-01-18 05:00:18,505 INFO L226 Difference]: Without dead ends: 1766 [2022-01-18 05:00:18,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=680, Invalid=6126, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 05:00:18,506 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 312 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:18,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 670 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 05:00:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2022-01-18 05:00:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1346. [2022-01-18 05:00:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.023791821561338) internal successors, (4067), 1345 states have internal predecessors, (4067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4067 transitions. [2022-01-18 05:00:18,522 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4067 transitions. Word has length 20 [2022-01-18 05:00:18,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:18,522 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 4067 transitions. [2022-01-18 05:00:18,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4067 transitions. [2022-01-18 05:00:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:18,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:18,524 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:18,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:18,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:18,724 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash 266869139, now seen corresponding path program 339 times [2022-01-18 05:00:18,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:18,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717359890] [2022-01-18 05:00:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:18,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:18,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:18,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717359890] [2022-01-18 05:00:18,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717359890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:18,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197978199] [2022-01-18 05:00:18,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:18,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:18,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:18,927 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) [2022-01-18 05:00:18,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-01-18 05:00:19,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 05:00:19,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:19,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:00:19,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:19,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-01-18 05:00:19,427 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 83 treesize of output 67 [2022-01-18 05:00:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:19,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:20,057 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:00:20,057 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 103 treesize of output 90 [2022-01-18 05:00:20,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 05:00:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:20,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197978199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:20,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:20,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 05:00:20,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396794684] [2022-01-18 05:00:20,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:20,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:00:20,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:00:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1142, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:00:20,274 INFO L87 Difference]: Start difference. First operand 1346 states and 4067 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:22,900 INFO L93 Difference]: Finished difference Result 1741 states and 4917 transitions. [2022-01-18 05:00:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:00:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:22,902 INFO L225 Difference]: With dead ends: 1741 [2022-01-18 05:00:22,902 INFO L226 Difference]: Without dead ends: 1695 [2022-01-18 05:00:22,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 05:00:22,903 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 214 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:22,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 677 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:00:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-01-18 05:00:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1345. [2022-01-18 05:00:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.0223214285714284) internal successors, (4062), 1344 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4062 transitions. [2022-01-18 05:00:22,919 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4062 transitions. Word has length 20 [2022-01-18 05:00:22,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:22,919 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4062 transitions. [2022-01-18 05:00:22,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4062 transitions. [2022-01-18 05:00:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:22,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:22,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:22,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:23,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:23,121 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:23,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1750758087, now seen corresponding path program 340 times [2022-01-18 05:00:23,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:23,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565872876] [2022-01-18 05:00:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:23,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:23,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:23,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565872876] [2022-01-18 05:00:23,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565872876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:23,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257750668] [2022-01-18 05:00:23,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:23,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:23,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:23,418 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) [2022-01-18 05:00:23,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-01-18 05:00:23,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:23,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:00:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:23,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 05:00:23,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:00:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:24,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:24,577 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:00:24,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 120 [2022-01-18 05:00:24,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 05:00:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:24,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257750668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:24,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:24,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 05:00:24,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368899760] [2022-01-18 05:00:24,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:24,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:00:24,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:24,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:00:24,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:00:24,744 INFO L87 Difference]: Start difference. First operand 1345 states and 4062 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:25,966 INFO L93 Difference]: Finished difference Result 1526 states and 4397 transitions. [2022-01-18 05:00:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:00:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:25,969 INFO L225 Difference]: With dead ends: 1526 [2022-01-18 05:00:25,969 INFO L226 Difference]: Without dead ends: 1502 [2022-01-18 05:00:25,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:00:25,969 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 142 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:25,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 633 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:00:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-01-18 05:00:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1361. [2022-01-18 05:00:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.0198529411764707) internal successors, (4107), 1360 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4107 transitions. [2022-01-18 05:00:25,984 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4107 transitions. Word has length 20 [2022-01-18 05:00:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:25,984 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 4107 transitions. [2022-01-18 05:00:25,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4107 transitions. [2022-01-18 05:00:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:25,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:25,985 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:26,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:26,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:26,186 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash -320122173, now seen corresponding path program 341 times [2022-01-18 05:00:26,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:26,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18124269] [2022-01-18 05:00:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:26,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:26,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:26,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18124269] [2022-01-18 05:00:26,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18124269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:26,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492450438] [2022-01-18 05:00:26,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:26,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:26,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:26,448 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) [2022-01-18 05:00:26,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-01-18 05:00:26,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:00:26,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:00:26,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:27,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-01-18 05:00:27,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 45 [2022-01-18 05:00:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:27,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:27,609 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:00:27,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 117 [2022-01-18 05:00:27,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 05:00:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:27,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492450438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:27,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:27,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 05:00:27,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185612273] [2022-01-18 05:00:27,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:27,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:00:27,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:00:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:00:27,776 INFO L87 Difference]: Start difference. First operand 1361 states and 4107 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:29,404 INFO L93 Difference]: Finished difference Result 1580 states and 4492 transitions. [2022-01-18 05:00:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:00:29,404 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:29,406 INFO L225 Difference]: With dead ends: 1580 [2022-01-18 05:00:29,406 INFO L226 Difference]: Without dead ends: 1558 [2022-01-18 05:00:29,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:00:29,407 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 193 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:29,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 499 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:00:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-01-18 05:00:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1366. [2022-01-18 05:00:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.021245421245421) internal successors, (4124), 1365 states have internal predecessors, (4124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4124 transitions. [2022-01-18 05:00:29,422 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4124 transitions. Word has length 20 [2022-01-18 05:00:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:29,422 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 4124 transitions. [2022-01-18 05:00:29,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4124 transitions. [2022-01-18 05:00:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:29,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:29,423 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:29,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-01-18 05:00:29,623 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,SelfDestructingSolverStorable349 [2022-01-18 05:00:29,624 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash 721453895, now seen corresponding path program 342 times [2022-01-18 05:00:29,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:29,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594536812] [2022-01-18 05:00:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:29,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:29,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:29,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594536812] [2022-01-18 05:00:29,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594536812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:29,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144980926] [2022-01-18 05:00:29,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:29,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:29,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:29,950 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) [2022-01-18 05:00:29,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-01-18 05:00:30,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:00:30,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:00:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:30,599 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 73 treesize of output 61 [2022-01-18 05:00:30,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 05:00:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:30,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:31,233 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:00:31,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 120 [2022-01-18 05:00:31,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 05:00:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:31,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144980926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:31,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:31,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 05:00:31,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207471692] [2022-01-18 05:00:31,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:31,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:00:31,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:31,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:00:31,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:00:31,406 INFO L87 Difference]: Start difference. First operand 1366 states and 4124 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:33,101 INFO L93 Difference]: Finished difference Result 1605 states and 4548 transitions. [2022-01-18 05:00:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:00:33,101 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:33,104 INFO L225 Difference]: With dead ends: 1605 [2022-01-18 05:00:33,104 INFO L226 Difference]: Without dead ends: 1578 [2022-01-18 05:00:33,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=289, Invalid=2681, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:00:33,104 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 186 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:33,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 523 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:00:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2022-01-18 05:00:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1373. [2022-01-18 05:00:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.022594752186589) internal successors, (4147), 1372 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4147 transitions. [2022-01-18 05:00:33,119 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4147 transitions. Word has length 20 [2022-01-18 05:00:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:33,119 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 4147 transitions. [2022-01-18 05:00:33,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4147 transitions. [2022-01-18 05:00:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:33,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:33,121 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:33,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-01-18 05:00:33,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:33,321 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash 755053123, now seen corresponding path program 343 times [2022-01-18 05:00:33,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:33,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056059607] [2022-01-18 05:00:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:33,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:33,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:33,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056059607] [2022-01-18 05:00:33,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056059607] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:33,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12198068] [2022-01-18 05:00:33,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:33,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:33,660 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) [2022-01-18 05:00:33,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-01-18 05:00:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:33,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:00:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:34,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 05:00:34,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 05:00:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:34,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:35,199 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-01-18 05:00:35,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 92 [2022-01-18 05:00:35,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:00:35,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:00:35,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:35,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 51 [2022-01-18 05:00:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:35,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12198068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:35,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:35,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 05:00:35,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111877934] [2022-01-18 05:00:35,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:35,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 05:00:35,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:35,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 05:00:35,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:00:35,312 INFO L87 Difference]: Start difference. First operand 1373 states and 4147 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:39,711 INFO L93 Difference]: Finished difference Result 1554 states and 4486 transitions. [2022-01-18 05:00:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:00:39,711 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:39,713 INFO L225 Difference]: With dead ends: 1554 [2022-01-18 05:00:39,713 INFO L226 Difference]: Without dead ends: 1522 [2022-01-18 05:00:39,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=603, Invalid=4227, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 05:00:39,713 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 392 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:39,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 484 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:00:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-01-18 05:00:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1375. [2022-01-18 05:00:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.021834061135371) internal successors, (4152), 1374 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4152 transitions. [2022-01-18 05:00:39,727 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4152 transitions. Word has length 20 [2022-01-18 05:00:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:39,728 INFO L470 AbstractCegarLoop]: Abstraction has 1375 states and 4152 transitions. [2022-01-18 05:00:39,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-01-18 05:00:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4152 transitions. [2022-01-18 05:00:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:39,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:39,729 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:39,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-01-18 05:00:39,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:39,929 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:39,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:39,930 INFO L85 PathProgramCache]: Analyzing trace with hash 287054403, now seen corresponding path program 344 times [2022-01-18 05:00:39,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:39,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647920721] [2022-01-18 05:00:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:39,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:00:40,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647920721] [2022-01-18 05:00:40,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647920721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569952415] [2022-01-18 05:00:40,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:40,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:40,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:40,041 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) [2022-01-18 05:00:40,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-01-18 05:00:40,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:40,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:40,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:00:40,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:40,384 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 87 treesize of output 71 [2022-01-18 05:00:40,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-01-18 05:00:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:00:40,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:40,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:40,664 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 42 treesize of output 40 [2022-01-18 05:00:40,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:40,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 05:00:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:00:40,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569952415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:40,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:40,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 05:00:40,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909128356] [2022-01-18 05:00:40,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:40,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:00:40,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:00:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:00:40,744 INFO L87 Difference]: Start difference. First operand 1375 states and 4152 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 05:00:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:41,158 INFO L93 Difference]: Finished difference Result 1460 states and 4328 transitions. [2022-01-18 05:00:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:00:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:41,160 INFO L225 Difference]: With dead ends: 1460 [2022-01-18 05:00:41,160 INFO L226 Difference]: Without dead ends: 1460 [2022-01-18 05:00:41,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:00:41,161 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:41,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 185 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:00:41,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-01-18 05:00:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1375. [2022-01-18 05:00:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.021834061135371) internal successors, (4152), 1374 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4152 transitions. [2022-01-18 05:00:41,175 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4152 transitions. Word has length 20 [2022-01-18 05:00:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:41,176 INFO L470 AbstractCegarLoop]: Abstraction has 1375 states and 4152 transitions. [2022-01-18 05:00:41,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-01-18 05:00:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4152 transitions. [2022-01-18 05:00:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:41,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:41,177 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:41,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:41,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:41,377 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2076524093, now seen corresponding path program 345 times [2022-01-18 05:00:41,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:41,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481219335] [2022-01-18 05:00:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:41,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:41,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:41,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481219335] [2022-01-18 05:00:41,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481219335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:41,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957588081] [2022-01-18 05:00:41,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:41,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:41,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:41,754 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) [2022-01-18 05:00:41,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-01-18 05:00:41,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:00:41,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 05:00:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:42,321 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 69 treesize of output 57 [2022-01-18 05:00:42,323 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 57 treesize of output 45 [2022-01-18 05:00:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:42,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:42,892 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:00:42,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 120 [2022-01-18 05:00:42,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-01-18 05:00:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:43,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957588081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:43,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:43,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 05:00:43,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390464328] [2022-01-18 05:00:43,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:43,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:00:43,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:00:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:00:43,038 INFO L87 Difference]: Start difference. First operand 1375 states and 4152 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:44,020 INFO L93 Difference]: Finished difference Result 1588 states and 4564 transitions. [2022-01-18 05:00:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:00:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:44,023 INFO L225 Difference]: With dead ends: 1588 [2022-01-18 05:00:44,023 INFO L226 Difference]: Without dead ends: 1558 [2022-01-18 05:00:44,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=1843, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:00:44,023 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:44,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 419 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:00:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-01-18 05:00:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1393. [2022-01-18 05:00:44,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 3.0251436781609193) internal successors, (4211), 1392 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4211 transitions. [2022-01-18 05:00:44,038 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4211 transitions. Word has length 20 [2022-01-18 05:00:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:44,038 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 4211 transitions. [2022-01-18 05:00:44,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4211 transitions. [2022-01-18 05:00:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:44,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:44,040 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:44,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:44,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-01-18 05:00:44,240 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1034948025, now seen corresponding path program 346 times [2022-01-18 05:00:44,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308083909] [2022-01-18 05:00:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:44,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:44,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308083909] [2022-01-18 05:00:44,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308083909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435396651] [2022-01-18 05:00:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:44,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:44,648 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) [2022-01-18 05:00:44,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-01-18 05:00:44,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:44,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:00:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:45,274 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 71 treesize of output 59 [2022-01-18 05:00:45,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:00:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:45,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:45,753 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:00:45,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 117 [2022-01-18 05:00:45,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 05:00:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:45,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435396651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:45,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:45,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-01-18 05:00:45,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478229107] [2022-01-18 05:00:45,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:45,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:00:45,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:00:45,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:00:45,928 INFO L87 Difference]: Start difference. First operand 1393 states and 4211 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 05:00:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:46,905 INFO L93 Difference]: Finished difference Result 1610 states and 4612 transitions. [2022-01-18 05:00:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:00:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:46,907 INFO L225 Difference]: With dead ends: 1610 [2022-01-18 05:00:46,908 INFO L226 Difference]: Without dead ends: 1584 [2022-01-18 05:00:46,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:00:46,908 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 131 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:46,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 462 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:00:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2022-01-18 05:00:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1407. [2022-01-18 05:00:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.026315789473684) internal successors, (4255), 1406 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4255 transitions. [2022-01-18 05:00:46,923 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4255 transitions. Word has length 20 [2022-01-18 05:00:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:46,923 INFO L470 AbstractCegarLoop]: Abstraction has 1407 states and 4255 transitions. [2022-01-18 05:00:46,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 05:00:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4255 transitions. [2022-01-18 05:00:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:46,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:46,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:46,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:47,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-01-18 05:00:47,137 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:47,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1001348797, now seen corresponding path program 347 times [2022-01-18 05:00:47,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:47,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223363686] [2022-01-18 05:00:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:47,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:47,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:47,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223363686] [2022-01-18 05:00:47,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223363686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:47,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415624001] [2022-01-18 05:00:47,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:47,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:47,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:47,501 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) [2022-01-18 05:00:47,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-01-18 05:00:47,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:00:47,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:00:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:48,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-01-18 05:00:48,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 45 [2022-01-18 05:00:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:48,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:48,759 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:00:48,760 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 144 treesize of output 117 [2022-01-18 05:00:48,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 05:00:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:48,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415624001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:48,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:48,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-01-18 05:00:48,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100637375] [2022-01-18 05:00:48,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:48,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:00:48,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:48,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:00:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:00:48,927 INFO L87 Difference]: Start difference. First operand 1407 states and 4255 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 05:00:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:51,153 INFO L93 Difference]: Finished difference Result 1694 states and 4792 transitions. [2022-01-18 05:00:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:00:51,153 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:51,156 INFO L225 Difference]: With dead ends: 1694 [2022-01-18 05:00:51,156 INFO L226 Difference]: Without dead ends: 1663 [2022-01-18 05:00:51,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=357, Invalid=2399, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:00:51,157 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 231 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:51,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 364 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:00:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-01-18 05:00:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1411. [2022-01-18 05:00:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 3.026241134751773) internal successors, (4267), 1410 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 4267 transitions. [2022-01-18 05:00:51,173 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 4267 transitions. Word has length 20 [2022-01-18 05:00:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:51,173 INFO L470 AbstractCegarLoop]: Abstraction has 1411 states and 4267 transitions. [2022-01-18 05:00:51,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 05:00:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 4267 transitions. [2022-01-18 05:00:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:51,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:51,175 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:51,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:51,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-01-18 05:00:51,376 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1135676875, now seen corresponding path program 348 times [2022-01-18 05:00:51,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:51,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77937037] [2022-01-18 05:00:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:51,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:00:51,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77937037] [2022-01-18 05:00:51,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77937037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799706235] [2022-01-18 05:00:51,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:51,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:51,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:51,501 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) [2022-01-18 05:00:51,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-01-18 05:00:51,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:00:51,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:51,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:00:51,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:51,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 05:00:51,844 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 71 treesize of output 55 [2022-01-18 05:00:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:00:51,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:52,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:52,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:00:52,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:52,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 05:00:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:00:52,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799706235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:52,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:52,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 05:00:52,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600872789] [2022-01-18 05:00:52,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:52,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:00:52,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:00:52,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:00:52,201 INFO L87 Difference]: Start difference. First operand 1411 states and 4267 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:53,058 INFO L93 Difference]: Finished difference Result 1561 states and 4578 transitions. [2022-01-18 05:00:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:00:53,058 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:53,060 INFO L225 Difference]: With dead ends: 1561 [2022-01-18 05:00:53,060 INFO L226 Difference]: Without dead ends: 1558 [2022-01-18 05:00:53,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:00:53,061 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:53,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 223 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:00:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-01-18 05:00:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1413. [2022-01-18 05:00:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.024787535410765) internal successors, (4271), 1412 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4271 transitions. [2022-01-18 05:00:53,076 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4271 transitions. Word has length 20 [2022-01-18 05:00:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:53,076 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 4271 transitions. [2022-01-18 05:00:53,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4271 transitions. [2022-01-18 05:00:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:53,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:53,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:53,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:53,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-01-18 05:00:53,278 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash -208979069, now seen corresponding path program 349 times [2022-01-18 05:00:53,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:53,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659174566] [2022-01-18 05:00:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:53,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:53,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:53,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659174566] [2022-01-18 05:00:53,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659174566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:53,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597309841] [2022-01-18 05:00:53,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:53,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:53,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:53,503 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) [2022-01-18 05:00:53,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-01-18 05:00:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:00:53,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:53,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-18 05:00:54,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 05:00:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:54,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:54,504 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:00:54,504 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 106 treesize of output 93 [2022-01-18 05:00:54,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 05:00:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:00:54,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597309841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:54,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:54,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2022-01-18 05:00:54,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93805322] [2022-01-18 05:00:54,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:54,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:00:54,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:00:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:00:54,738 INFO L87 Difference]: Start difference. First operand 1413 states and 4271 transitions. Second operand has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 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) [2022-01-18 05:00:56,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:56,678 INFO L93 Difference]: Finished difference Result 1703 states and 4858 transitions. [2022-01-18 05:00:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:00:56,678 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:00:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:56,681 INFO L225 Difference]: With dead ends: 1703 [2022-01-18 05:00:56,681 INFO L226 Difference]: Without dead ends: 1666 [2022-01-18 05:00:56,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=445, Invalid=3337, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:00:56,681 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 190 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:00:56,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 462 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:00:56,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-01-18 05:00:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1437. [2022-01-18 05:00:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 3.0243732590529246) internal successors, (4343), 1436 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:00:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 4343 transitions. [2022-01-18 05:00:56,698 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 4343 transitions. Word has length 20 [2022-01-18 05:00:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:56,698 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 4343 transitions. [2022-01-18 05:00:56,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 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) [2022-01-18 05:00:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 4343 transitions. [2022-01-18 05:00:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:56,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:56,699 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:56,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:56,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:56,900 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:00:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1937191691, now seen corresponding path program 350 times [2022-01-18 05:00:56,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:56,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836161628] [2022-01-18 05:00:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:56,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:57,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:57,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836161628] [2022-01-18 05:00:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836161628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:57,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976618276] [2022-01-18 05:00:57,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:57,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:57,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:57,116 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) [2022-01-18 05:00:57,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-01-18 05:00:57,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:57,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:00:57,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:57,570 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 93 treesize of output 77 [2022-01-18 05:00:57,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-18 05:00:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:57,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:58,072 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:00:58,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2022-01-18 05:00:58,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-01-18 05:00:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:00:58,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976618276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:58,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:58,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 33 [2022-01-18 05:00:58,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463424930] [2022-01-18 05:00:58,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:58,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:00:58,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:00:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:00:58,232 INFO L87 Difference]: Start difference. First operand 1437 states and 4343 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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) [2022-01-18 05:01:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:00,295 INFO L93 Difference]: Finished difference Result 1770 states and 5030 transitions. [2022-01-18 05:01:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 05:01:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:01:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:00,298 INFO L225 Difference]: With dead ends: 1770 [2022-01-18 05:01:00,298 INFO L226 Difference]: Without dead ends: 1725 [2022-01-18 05:01:00,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=410, Invalid=3496, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 05:01:00,298 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 232 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:01:00,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 489 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:01:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-01-18 05:01:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1446. [2022-01-18 05:01:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.022145328719723) internal successors, (4367), 1445 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) [2022-01-18 05:01:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4367 transitions. [2022-01-18 05:01:00,315 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4367 transitions. Word has length 20 [2022-01-18 05:01:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:00,315 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4367 transitions. [2022-01-18 05:01:00,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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) [2022-01-18 05:01:00,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4367 transitions. [2022-01-18 05:01:00,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:00,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:00,316 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:00,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-01-18 05:01:00,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:00,517 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:01:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1540793159, now seen corresponding path program 351 times [2022-01-18 05:01:00,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:00,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73036292] [2022-01-18 05:01:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:00,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:00,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:00,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73036292] [2022-01-18 05:01:00,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73036292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:00,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632980248] [2022-01-18 05:01:00,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:01:00,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:00,888 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) [2022-01-18 05:01:00,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-01-18 05:01:00,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:01:00,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:00,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 05:01:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:01,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-01-18 05:01:01,491 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 59 treesize of output 47 [2022-01-18 05:01:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:01,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:01,993 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:01:01,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 118 [2022-01-18 05:01:01,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 81 [2022-01-18 05:01:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:02,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632980248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:02,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:02,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-01-18 05:01:02,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911900110] [2022-01-18 05:01:02,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:02,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:01:02,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:02,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:01:02,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:01:02,182 INFO L87 Difference]: Start difference. First operand 1446 states and 4367 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 05:01:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:03,879 INFO L93 Difference]: Finished difference Result 1687 states and 4824 transitions. [2022-01-18 05:01:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:01:03,880 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:01:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:03,882 INFO L225 Difference]: With dead ends: 1687 [2022-01-18 05:01:03,882 INFO L226 Difference]: Without dead ends: 1654 [2022-01-18 05:01:03,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=432, Invalid=3474, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 05:01:03,883 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 163 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:01:03,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 440 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:01:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-01-18 05:01:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1461. [2022-01-18 05:01:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.026027397260274) internal successors, (4418), 1460 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:01:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4418 transitions. [2022-01-18 05:01:03,899 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4418 transitions. Word has length 20 [2022-01-18 05:01:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:03,899 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4418 transitions. [2022-01-18 05:01:03,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 05:01:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4418 transitions. [2022-01-18 05:01:03,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:03,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:03,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:03,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Ended with exit code 0 [2022-01-18 05:01:04,101 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,SelfDestructingSolverStorable359 [2022-01-18 05:01:04,102 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:01:04,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:04,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1574392387, now seen corresponding path program 352 times [2022-01-18 05:01:04,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:04,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007102078] [2022-01-18 05:01:04,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:04,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:04,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007102078] [2022-01-18 05:01:04,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007102078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479723797] [2022-01-18 05:01:04,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:01:04,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:04,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:04,469 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) [2022-01-18 05:01:04,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-01-18 05:01:04,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:01:04,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:04,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 05:01:04,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:05,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 05:01:05,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-01-18 05:01:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:05,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:05,526 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 05:01:05,526 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 144 treesize of output 117 [2022-01-18 05:01:05,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-01-18 05:01:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:05,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479723797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:05,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:05,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-01-18 05:01:05,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894429705] [2022-01-18 05:01:05,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:05,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:01:05,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:05,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:01:05,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:01:05,721 INFO L87 Difference]: Start difference. First operand 1461 states and 4418 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 05:01:08,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:08,161 INFO L93 Difference]: Finished difference Result 1677 states and 4790 transitions. [2022-01-18 05:01:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 05:01:08,162 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:01:08,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:08,164 INFO L225 Difference]: With dead ends: 1677 [2022-01-18 05:01:08,164 INFO L226 Difference]: Without dead ends: 1648 [2022-01-18 05:01:08,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=546, Invalid=3876, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 05:01:08,165 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 227 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:01:08,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 454 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:01:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2022-01-18 05:01:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1461. [2022-01-18 05:01:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.0239726027397262) internal successors, (4415), 1460 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:01:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4415 transitions. [2022-01-18 05:01:08,181 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4415 transitions. Word has length 20 [2022-01-18 05:01:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:08,181 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4415 transitions. [2022-01-18 05:01:08,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-01-18 05:01:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4415 transitions. [2022-01-18 05:01:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:08,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:08,183 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:08,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:08,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:08,383 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 05:01:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:08,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1469347517, now seen corresponding path program 353 times [2022-01-18 05:01:08,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:08,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38378495] [2022-01-18 05:01:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:08,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:01:08,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:08,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38378495] [2022-01-18 05:01:08,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38378495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:08,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138730015] [2022-01-18 05:01:08,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:01:08,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:08,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:08,530 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) [2022-01-18 05:01:08,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-01-18 05:01:08,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:01:08,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:01:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:08,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-01-18 05:01:08,847 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 71 treesize of output 55 [2022-01-18 05:01:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:01:08,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:09,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:09,052 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 33 treesize of output 33 [2022-01-18 05:01:09,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:09,057 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 25 treesize of output 25 [2022-01-18 05:01:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:01:09,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138730015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:09,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:09,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 05:01:09,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380855918] [2022-01-18 05:01:09,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:09,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:01:09,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:01:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:01:09,166 INFO L87 Difference]: Start difference. First operand 1461 states and 4415 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 05:01:09,530 WARN L244 SmtUtils]: Removed 6 from assertion stack [2022-01-18 05:01:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:01:09,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:01:09,531 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:01:09,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:01:09,531 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 05:01:09,532 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 05:01:09,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:09,567 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 [2022-01-18 05:01:09,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:09,732 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1461states) and FLOYD_HOARE automaton (currently 15 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 24 for 25ms.. [2022-01-18 05:01:09,733 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 05:01:09,734 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 05:01:09,735 INFO L732 BasicCegarLoop]: Path program histogram: [353, 5, 4] [2022-01-18 05:01:09,737 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 05:01:09,737 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 05:01:09,738 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:01:09 BasicIcfg [2022-01-18 05:01:09,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 05:01:09,738 INFO L158 Benchmark]: Toolchain (without parser) took 770656.49ms. Allocated memory was 411.0MB in the beginning and 622.9MB in the end (delta: 211.8MB). Free memory was 368.0MB in the beginning and 518.9MB in the end (delta: -150.9MB). Peak memory consumption was 62.6MB. Max. memory is 16.0GB. [2022-01-18 05:01:09,738 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 411.0MB. Free memory is still 369.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:01:09,738 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.51ms. Allocated memory is still 411.0MB. Free memory was 367.9MB in the beginning and 366.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 05:01:09,738 INFO L158 Benchmark]: Boogie Preprocessor took 22.44ms. Allocated memory is still 411.0MB. Free memory was 366.3MB in the beginning and 365.4MB in the end (delta: 986.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 05:01:09,738 INFO L158 Benchmark]: RCFGBuilder took 256.09ms. Allocated memory is still 411.0MB. Free memory was 365.4MB in the beginning and 354.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 05:01:09,738 INFO L158 Benchmark]: TraceAbstraction took 770350.66ms. Allocated memory was 411.0MB in the beginning and 622.9MB in the end (delta: 211.8MB). Free memory was 353.5MB in the beginning and 518.9MB in the end (delta: -165.3MB). Peak memory consumption was 47.9MB. Max. memory is 16.0GB. [2022-01-18 05:01:09,738 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 0.10ms. Allocated memory is still 411.0MB. Free memory is still 369.2MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.51ms. Allocated memory is still 411.0MB. Free memory was 367.9MB in the beginning and 366.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.44ms. Allocated memory is still 411.0MB. Free memory was 366.3MB in the beginning and 365.4MB in the end (delta: 986.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 256.09ms. Allocated memory is still 411.0MB. Free memory was 365.4MB in the beginning and 354.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 770350.66ms. Allocated memory was 411.0MB in the beginning and 622.9MB in the end (delta: 211.8MB). Free memory was 353.5MB in the beginning and 518.9MB in the end (delta: -165.3MB). Peak memory consumption was 47.9MB. Max. memory is 16.0GB. * 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: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1461states) and FLOYD_HOARE automaton (currently 15 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 24 for 25ms.. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1461states) and FLOYD_HOARE automaton (currently 15 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 24 for 25ms.. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1461states) and FLOYD_HOARE automaton (currently 15 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 24 for 25ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 770.2s, OverallIterations: 362, TraceHistogramMax: 5, PathProgramHistogramMax: 353, EmptinessCheckTime: 0.3s, AutomataDifference: 354.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47477 SdHoareTripleChecker+Valid, 110.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47477 mSDsluCounter, 85905 SdHoareTripleChecker+Invalid, 93.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 142 IncrementalHoareTripleChecker+Unchecked, 148793 mSDsCounter, 19639 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 273591 IncrementalHoareTripleChecker+Invalid, 293372 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19639 mSolverCounterUnsat, 5100 mSDtfsCounter, 273591 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21224 GetRequests, 7624 SyntacticMatches, 53 SemanticMatches, 13546 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129923 ImplicationChecksByTransitivity, 362.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1461occurred in iteration=360, InterpolantAutomatonStates: 9322, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 361 MinimizatonAttempts, 43761 StatesRemovedByMinimization, 358 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 320.1s InterpolantComputationTime, 12791 NumberOfCodeBlocks, 12791 NumberOfCodeBlocksAsserted, 1213 NumberOfCheckSat, 18062 ConstructedInterpolants, 3 QuantifiedInterpolants, 250815 SizeOfPredicates, 4457 NumberOfNonLiveVariables, 32341 ConjunctsInSsa, 11526 ConjunctsInUnsatCore, 1068 InterpolantComputations, 9 PerfectInterpolantSequences, 1062/13295 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