/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:46:51,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:46:51,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:46:51,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:46:51,732 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 [2021-08-06 14:46:51,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:46:51,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:46:51,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:46:51,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:46:51,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:46:51,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:46:51,770 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:46:51,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:46:51,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:46:51,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:46:51,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:46:51,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:46:51,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:46:51,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:46:51,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:46:51,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:46:51,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:46:51,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:46:51,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:46:51,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:46:51,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:46:51,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:46:51,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:46:51,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:46:51,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:46:51,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:46:51,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:46:51,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:46:51,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:46:51,774 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:46:51,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:46:51,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:46:52,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:46:52,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:46:52,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:46:52,115 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:46:52,121 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:46:52,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl [2021-08-06 14:46:52,122 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2021-08-06 14:46:52,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:46:52,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:46:52,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:46:52,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:46:52,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:46:52,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:46:52,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:46:52,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:46:52,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:46:52,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:46:52,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:46:52,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:46:52,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:46:52,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/1) ... [2021-08-06 14:46:52,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:46:52,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:52,254 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) [2021-08-06 14:46:52,284 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 [2021-08-06 14:46:52,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:46:52,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:46:52,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:46:52,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:46:52,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:46:52,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:46:52,307 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:46:52,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:46:52,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:46:52,307 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:46:52,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:46:52,308 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:46:52,308 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 14:46:52,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 14:46:52,308 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 14:46:52,309 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 14:46:52,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:46:52,550 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-06 14:46:52,550 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 14:46:52,551 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-06 14:46:52,551 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-08-06 14:46:52,553 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:46:52 BoogieIcfgContainer [2021-08-06 14:46:52,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:46:52,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:46:52,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:46:52,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:46:52,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:46:52" (1/2) ... [2021-08-06 14:46:52,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ceb1c and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:46:52, skipping insertion in model container [2021-08-06 14:46:52,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:46:52" (2/2) ... [2021-08-06 14:46:52,559 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2021-08-06 14:46:52,564 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:46:52,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:46:52,564 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:46:52,564 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:46:52,624 INFO L148 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-08-06 14:46:52,658 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thread1Thread1of1ForFork0 ======== [2021-08-06 14:46:52,663 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, mConcurrency=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 [2021-08-06 14:46:52,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-06 14:46:52,671 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-08-06 14:46:52,683 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:52,690 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 14:46:52,691 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Thread1of1ForFork0Err0INUSE_VIOLATION [2021-08-06 14:46:52,692 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Thread1of1ForFork0Err1INUSE_VIOLATION [2021-08-06 14:46:52,695 INFO L308 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork0 was SAFE,SAFE (1/2) [2021-08-06 14:46:52,699 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:46:52,701 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, mConcurrency=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 [2021-08-06 14:46:52,701 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 14:46:52,703 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-08-06 14:46:52,725 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 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) [2021-08-06 14:46:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 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) [2021-08-06 14:46:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:46:52,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:52,732 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:52,732 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:52,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1639101113, now seen corresponding path program 1 times [2021-08-06 14:46:52,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:52,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602134176] [2021-08-06 14:46:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:52,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:53,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:53,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602134176] [2021-08-06 14:46:53,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602134176] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:53,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:53,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:46:53,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833046356] [2021-08-06 14:46:53,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:46:53,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:46:53,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:46:53,047 INFO L87 Difference]: Start difference. First operand has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 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) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:53,135 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2021-08-06 14:46:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:46:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:46:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:53,148 INFO L225 Difference]: With dead ends: 253 [2021-08-06 14:46:53,148 INFO L226 Difference]: Without dead ends: 247 [2021-08-06 14:46:53,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-06 14:46:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2021-08-06 14:46:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-08-06 14:46:53,221 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2021-08-06 14:46:53,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:53,223 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-08-06 14:46:53,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:53,223 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-08-06 14:46:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:46:53,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:53,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:53,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:46:53,230 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash -852565589, now seen corresponding path program 2 times [2021-08-06 14:46:53,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:53,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145144581] [2021-08-06 14:46:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:53,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:53,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:53,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145144581] [2021-08-06 14:46:53,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145144581] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:53,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:53,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:46:53,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172865569] [2021-08-06 14:46:53,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:46:53,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:53,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:46:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:46:53,301 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:53,334 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2021-08-06 14:46:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:46:53,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:46:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:53,337 INFO L225 Difference]: With dead ends: 262 [2021-08-06 14:46:53,337 INFO L226 Difference]: Without dead ends: 256 [2021-08-06 14:46:53,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-06 14:46:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2021-08-06 14:46:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.923611111111111) internal successors, (421), 144 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2021-08-06 14:46:53,350 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2021-08-06 14:46:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:53,350 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2021-08-06 14:46:53,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2021-08-06 14:46:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:53,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:53,352 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:53,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:46:53,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash 105140105, now seen corresponding path program 1 times [2021-08-06 14:46:53,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:53,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017660256] [2021-08-06 14:46:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:53,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:53,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:53,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017660256] [2021-08-06 14:46:53,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017660256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:53,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979743012] [2021-08-06 14:46:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:53,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:53,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:53,429 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) [2021-08-06 14:46:53,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 14:46:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:46:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:53,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979743012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:53,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:53,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:46:53,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639030742] [2021-08-06 14:46:53,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:46:53,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:53,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:46:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:46:53,667 INFO L87 Difference]: Start difference. First operand 145 states and 421 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:53,723 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2021-08-06 14:46:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:46:53,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:53,725 INFO L225 Difference]: With dead ends: 199 [2021-08-06 14:46:53,725 INFO L226 Difference]: Without dead ends: 199 [2021-08-06 14:46:53,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:46:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-06 14:46:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2021-08-06 14:46:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0067567567567566) internal successors, (445), 148 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2021-08-06 14:46:53,735 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2021-08-06 14:46:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:53,735 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2021-08-06 14:46:53,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2021-08-06 14:46:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:53,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:53,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:53,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:53,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:53,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1032435817, now seen corresponding path program 1 times [2021-08-06 14:46:53,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:53,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556713821] [2021-08-06 14:46:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:53,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:53,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:53,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556713821] [2021-08-06 14:46:53,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556713821] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:53,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:53,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:46:53,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089213015] [2021-08-06 14:46:53,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:53,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:53,993 INFO L87 Difference]: Start difference. First operand 149 states and 445 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:54,072 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2021-08-06 14:46:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:46:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:54,075 INFO L225 Difference]: With dead ends: 246 [2021-08-06 14:46:54,075 INFO L226 Difference]: Without dead ends: 214 [2021-08-06 14:46:54,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:46:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-06 14:46:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-08-06 14:46:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.901840490797546) internal successors, (473), 163 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2021-08-06 14:46:54,093 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2021-08-06 14:46:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:54,093 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2021-08-06 14:46:54,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2021-08-06 14:46:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:54,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:54,094 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:54,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:46:54,095 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash 973094452, now seen corresponding path program 1 times [2021-08-06 14:46:54,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:54,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950520956] [2021-08-06 14:46:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:54,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:54,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:54,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950520956] [2021-08-06 14:46:54,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950520956] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:54,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:54,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:46:54,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587559545] [2021-08-06 14:46:54,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:46:54,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:54,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:46:54,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:46:54,150 INFO L87 Difference]: Start difference. First operand 164 states and 473 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:54,171 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2021-08-06 14:46:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:46:54,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:54,173 INFO L225 Difference]: With dead ends: 153 [2021-08-06 14:46:54,173 INFO L226 Difference]: Without dead ends: 137 [2021-08-06 14:46:54,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:46:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-06 14:46:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-08-06 14:46:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.7954545454545454) internal successors, (369), 132 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) [2021-08-06 14:46:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2021-08-06 14:46:54,176 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2021-08-06 14:46:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:54,177 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2021-08-06 14:46:54,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2021-08-06 14:46:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:54,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:54,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:54,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 14:46:54,178 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash 804217187, now seen corresponding path program 2 times [2021-08-06 14:46:54,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:54,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308611693] [2021-08-06 14:46:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:54,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:54,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:54,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308611693] [2021-08-06 14:46:54,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308611693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:54,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295235722] [2021-08-06 14:46:54,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:46:54,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:54,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:54,237 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) [2021-08-06 14:46:54,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 14:46:54,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:46:54,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:46:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:54,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295235722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:54,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:54,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:46:54,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344743359] [2021-08-06 14:46:54,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:46:54,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:46:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:46:54,491 INFO L87 Difference]: Start difference. First operand 133 states and 369 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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) [2021-08-06 14:46:54,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:54,543 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2021-08-06 14:46:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:46:54,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:54,545 INFO L225 Difference]: With dead ends: 205 [2021-08-06 14:46:54,545 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 14:46:54,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:46:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 14:46:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-08-06 14:46:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.837037037037037) internal successors, (383), 135 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2021-08-06 14:46:54,551 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2021-08-06 14:46:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:54,551 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2021-08-06 14:46:54,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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) [2021-08-06 14:46:54,552 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2021-08-06 14:46:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:54,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:54,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:54,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:54,769 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,SelfDestructingSolverStorable5 [2021-08-06 14:46:54,769 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:54,769 INFO L82 PathProgramCache]: Analyzing trace with hash 26248067, now seen corresponding path program 2 times [2021-08-06 14:46:54,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:54,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145273579] [2021-08-06 14:46:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:54,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:54,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:54,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145273579] [2021-08-06 14:46:54,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145273579] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:54,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:54,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:46:54,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446929147] [2021-08-06 14:46:54,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:54,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:54,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:54,829 INFO L87 Difference]: Start difference. First operand 136 states and 383 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:54,935 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2021-08-06 14:46:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:46:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:54,938 INFO L225 Difference]: With dead ends: 253 [2021-08-06 14:46:54,938 INFO L226 Difference]: Without dead ends: 244 [2021-08-06 14:46:54,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:46:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-06 14:46:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-08-06 14:46:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.811320754716981) internal successors, (447), 159 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2021-08-06 14:46:54,947 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2021-08-06 14:46:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:54,947 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2021-08-06 14:46:54,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2021-08-06 14:46:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:54,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:54,948 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:54,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 14:46:54,949 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash -738712767, now seen corresponding path program 3 times [2021-08-06 14:46:54,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:54,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710014573] [2021-08-06 14:46:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:54,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:55,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:55,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710014573] [2021-08-06 14:46:55,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710014573] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:55,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:55,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:46:55,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331002880] [2021-08-06 14:46:55,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:55,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:55,008 INFO L87 Difference]: Start difference. First operand 160 states and 447 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:55,066 INFO L93 Difference]: Finished difference Result 193 states and 523 transitions. [2021-08-06 14:46:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:46:55,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:55,068 INFO L225 Difference]: With dead ends: 193 [2021-08-06 14:46:55,069 INFO L226 Difference]: Without dead ends: 193 [2021-08-06 14:46:55,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:46:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-06 14:46:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-08-06 14:46:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 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) [2021-08-06 14:46:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-08-06 14:46:55,073 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 18 [2021-08-06 14:46:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:55,074 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-08-06 14:46:55,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-08-06 14:46:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:55,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:55,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:55,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 14:46:55,084 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1491858461, now seen corresponding path program 3 times [2021-08-06 14:46:55,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:55,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134216595] [2021-08-06 14:46:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:55,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:55,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:55,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134216595] [2021-08-06 14:46:55,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134216595] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:55,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:55,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:46:55,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128933032] [2021-08-06 14:46:55,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:55,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:55,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:55,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:55,139 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:55,203 INFO L93 Difference]: Finished difference Result 193 states and 512 transitions. [2021-08-06 14:46:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:46:55,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:55,205 INFO L225 Difference]: With dead ends: 193 [2021-08-06 14:46:55,205 INFO L226 Difference]: Without dead ends: 190 [2021-08-06 14:46:55,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:46:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-06 14:46:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2021-08-06 14:46:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 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) [2021-08-06 14:46:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-08-06 14:46:55,210 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-08-06 14:46:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:55,210 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-08-06 14:46:55,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-08-06 14:46:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:55,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:55,211 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:55,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 14:46:55,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:55,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:55,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1888362025, now seen corresponding path program 4 times [2021-08-06 14:46:55,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:55,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048800016] [2021-08-06 14:46:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:55,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:55,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:55,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048800016] [2021-08-06 14:46:55,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048800016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:55,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732531515] [2021-08-06 14:46:55,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:46:55,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:55,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:55,261 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) [2021-08-06 14:46:55,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 14:46:55,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:46:55,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:55,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:46:55,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:55,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732531515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:55,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:55,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:46:55,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642277791] [2021-08-06 14:46:55,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:46:55,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:55,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:46:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:46:55,547 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-08-06 14:46:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:55,606 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2021-08-06 14:46:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:46:55,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:55,608 INFO L225 Difference]: With dead ends: 193 [2021-08-06 14:46:55,608 INFO L226 Difference]: Without dead ends: 193 [2021-08-06 14:46:55,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:46:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-06 14:46:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-08-06 14:46:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 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) [2021-08-06 14:46:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-08-06 14:46:55,613 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-08-06 14:46:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:55,613 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-08-06 14:46:55,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-08-06 14:46:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-08-06 14:46:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:55,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:55,614 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:55,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:55,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:55,829 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:55,829 INFO L82 PathProgramCache]: Analyzing trace with hash 978830285, now seen corresponding path program 4 times [2021-08-06 14:46:55,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:55,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390876828] [2021-08-06 14:46:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:55,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:55,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:55,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390876828] [2021-08-06 14:46:55,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390876828] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:55,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:55,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:46:55,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314928892] [2021-08-06 14:46:55,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:55,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:55,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:55,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:55,875 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:55,934 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2021-08-06 14:46:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:46:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:55,935 INFO L225 Difference]: With dead ends: 197 [2021-08-06 14:46:55,935 INFO L226 Difference]: Without dead ends: 188 [2021-08-06 14:46:55,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:46:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-06 14:46:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2021-08-06 14:46:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2021-08-06 14:46:55,940 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2021-08-06 14:46:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:55,941 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2021-08-06 14:46:55,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2021-08-06 14:46:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:55,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:55,942 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:55,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 14:46:55,942 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:55,942 INFO L82 PathProgramCache]: Analyzing trace with hash 354089523, now seen corresponding path program 5 times [2021-08-06 14:46:55,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:55,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612246827] [2021-08-06 14:46:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:55,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:55,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:55,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612246827] [2021-08-06 14:46:55,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612246827] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:55,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:55,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:46:55,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209505884] [2021-08-06 14:46:55,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:55,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:55,974 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:56,023 INFO L93 Difference]: Finished difference Result 190 states and 506 transitions. [2021-08-06 14:46:56,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:46:56,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:56,025 INFO L225 Difference]: With dead ends: 190 [2021-08-06 14:46:56,025 INFO L226 Difference]: Without dead ends: 190 [2021-08-06 14:46:56,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:46:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-06 14:46:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2021-08-06 14:46:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2021-08-06 14:46:56,030 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2021-08-06 14:46:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:56,030 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2021-08-06 14:46:56,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2021-08-06 14:46:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:56,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:56,031 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:56,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 14:46:56,031 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:56,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1710306545, now seen corresponding path program 5 times [2021-08-06 14:46:56,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:56,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827085637] [2021-08-06 14:46:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:56,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:56,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:56,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827085637] [2021-08-06 14:46:56,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827085637] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:56,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:56,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:46:56,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991668495] [2021-08-06 14:46:56,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:56,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:56,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:56,069 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:56,145 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2021-08-06 14:46:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:46:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:56,147 INFO L225 Difference]: With dead ends: 248 [2021-08-06 14:46:56,147 INFO L226 Difference]: Without dead ends: 245 [2021-08-06 14:46:56,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:46:56,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-06 14:46:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 161. [2021-08-06 14:46:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.775) internal successors, (444), 160 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2021-08-06 14:46:56,152 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2021-08-06 14:46:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:56,152 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2021-08-06 14:46:56,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2021-08-06 14:46:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:56,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:56,153 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:56,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-06 14:46:56,153 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash 759478481, now seen corresponding path program 6 times [2021-08-06 14:46:56,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:56,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367911607] [2021-08-06 14:46:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:56,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:56,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:56,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367911607] [2021-08-06 14:46:56,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367911607] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:56,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:56,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:46:56,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558542940] [2021-08-06 14:46:56,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:56,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:56,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:56,188 INFO L87 Difference]: Start difference. First operand 161 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:56,242 INFO L93 Difference]: Finished difference Result 178 states and 466 transitions. [2021-08-06 14:46:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:46:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:56,244 INFO L225 Difference]: With dead ends: 178 [2021-08-06 14:46:56,244 INFO L226 Difference]: Without dead ends: 178 [2021-08-06 14:46:56,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:46:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-06 14:46:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2021-08-06 14:46:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.798507462686567) internal successors, (375), 134 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 375 transitions. [2021-08-06 14:46:56,248 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 375 transitions. Word has length 18 [2021-08-06 14:46:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:56,248 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 375 transitions. [2021-08-06 14:46:56,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 375 transitions. [2021-08-06 14:46:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:46:56,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:56,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:56,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-06 14:46:56,263 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 631984787, now seen corresponding path program 6 times [2021-08-06 14:46:56,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:56,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777909319] [2021-08-06 14:46:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:56,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:56,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:56,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777909319] [2021-08-06 14:46:56,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777909319] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:56,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:46:56,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:46:56,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239881899] [2021-08-06 14:46:56,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:56,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:46:56,305 INFO L87 Difference]: Start difference. First operand 135 states and 375 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:56,353 INFO L93 Difference]: Finished difference Result 139 states and 378 transitions. [2021-08-06 14:46:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:46:56,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:46:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:56,354 INFO L225 Difference]: With dead ends: 139 [2021-08-06 14:46:56,354 INFO L226 Difference]: Without dead ends: 135 [2021-08-06 14:46:56,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:46:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-06 14:46:56,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-08-06 14:46:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-08-06 14:46:56,358 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2021-08-06 14:46:56,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:56,358 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-08-06 14:46:56,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-08-06 14:46:56,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:46:56,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:56,359 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:56,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-06 14:46:56,360 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:56,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2083966421, now seen corresponding path program 1 times [2021-08-06 14:46:56,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:56,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101804193] [2021-08-06 14:46:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:56,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:56,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:56,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101804193] [2021-08-06 14:46:56,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101804193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:56,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053983671] [2021-08-06 14:46:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:56,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:56,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:56,517 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) [2021-08-06 14:46:56,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 14:46:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:56,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:46:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:56,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-06 14:46:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:57,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053983671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:57,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:57,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 14:46:57,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709062789] [2021-08-06 14:46:57,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:57,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:57,034 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:46:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:57,488 INFO L93 Difference]: Finished difference Result 382 states and 1086 transitions. [2021-08-06 14:46:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:46:57,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 20 [2021-08-06 14:46:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:57,490 INFO L225 Difference]: With dead ends: 382 [2021-08-06 14:46:57,490 INFO L226 Difference]: Without dead ends: 372 [2021-08-06 14:46:57,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:46:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-08-06 14:46:57,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 186. [2021-08-06 14:46:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8162162162162163) internal successors, (521), 185 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) [2021-08-06 14:46:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2021-08-06 14:46:57,497 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2021-08-06 14:46:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:57,497 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2021-08-06 14:46:57,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:46:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2021-08-06 14:46:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:46:57,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:57,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:57,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:57,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 14:46:57,717 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:57,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1077905909, now seen corresponding path program 2 times [2021-08-06 14:46:57,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:57,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981373177] [2021-08-06 14:46:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:57,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:57,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:57,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981373177] [2021-08-06 14:46:57,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981373177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:57,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722183023] [2021-08-06 14:46:57,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:46:57,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:57,918 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) [2021-08-06 14:46:57,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 14:46:58,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:46:58,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:58,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:46:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:58,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:58,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-08-06 14:46:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:58,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722183023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:58,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:58,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 14:46:58,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900126753] [2021-08-06 14:46:58,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:46:58,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:58,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:46:58,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:46:58,637 INFO L87 Difference]: Start difference. First operand 186 states and 521 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-08-06 14:46:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:59,630 INFO L93 Difference]: Finished difference Result 399 states and 1155 transitions. [2021-08-06 14:46:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:46:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 20 [2021-08-06 14:46:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:59,633 INFO L225 Difference]: With dead ends: 399 [2021-08-06 14:46:59,633 INFO L226 Difference]: Without dead ends: 389 [2021-08-06 14:46:59,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:46:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-06 14:46:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 189. [2021-08-06 14:46:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8191489361702127) internal successors, (530), 188 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) [2021-08-06 14:46:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 530 transitions. [2021-08-06 14:46:59,640 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 530 transitions. Word has length 20 [2021-08-06 14:46:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:59,640 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 530 transitions. [2021-08-06 14:46:59,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-08-06 14:46:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 530 transitions. [2021-08-06 14:46:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:46:59,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:59,641 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:59,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:59,841 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,SelfDestructingSolverStorable16 [2021-08-06 14:46:59,842 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:46:59,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:59,842 INFO L82 PathProgramCache]: Analyzing trace with hash 800910909, now seen corresponding path program 3 times [2021-08-06 14:46:59,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:59,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799857321] [2021-08-06 14:46:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:59,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:59,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:59,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799857321] [2021-08-06 14:46:59,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799857321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:59,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123396637] [2021-08-06 14:46:59,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:46:59,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:59,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:59,998 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) [2021-08-06 14:46:59,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 14:47:00,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:47:00,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:00,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:47:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:00,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:00,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 14:47:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:00,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123396637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:00,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:00,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-06 14:47:00,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78283381] [2021-08-06 14:47:00,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:47:00,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:00,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:47:00,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:00,655 INFO L87 Difference]: Start difference. First operand 189 states and 530 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-08-06 14:47:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:01,591 INFO L93 Difference]: Finished difference Result 367 states and 1061 transitions. [2021-08-06 14:47:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:47:01,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 20 [2021-08-06 14:47:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:01,594 INFO L225 Difference]: With dead ends: 367 [2021-08-06 14:47:01,594 INFO L226 Difference]: Without dead ends: 357 [2021-08-06 14:47:01,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 740.9ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:47:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-06 14:47:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 192. [2021-08-06 14:47:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8219895287958114) internal successors, (539), 191 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 539 transitions. [2021-08-06 14:47:01,600 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 539 transitions. Word has length 20 [2021-08-06 14:47:01,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:01,600 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 539 transitions. [2021-08-06 14:47:01,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-08-06 14:47:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 539 transitions. [2021-08-06 14:47:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:01,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:01,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:01,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:01,814 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,SelfDestructingSolverStorable17 [2021-08-06 14:47:01,814 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:01,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:01,814 INFO L82 PathProgramCache]: Analyzing trace with hash -32827531, now seen corresponding path program 4 times [2021-08-06 14:47:01,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:01,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808646931] [2021-08-06 14:47:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:01,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:01,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:01,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808646931] [2021-08-06 14:47:01,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808646931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:01,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776497521] [2021-08-06 14:47:01,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:47:01,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:01,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:01,947 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) [2021-08-06 14:47:01,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 14:47:02,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:47:02,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:02,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:02,320 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:02,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:02,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776497521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:02,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:02,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:02,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706895185] [2021-08-06 14:47:02,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:02,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:02,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:02,526 INFO L87 Difference]: Start difference. First operand 192 states and 539 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:02,829 INFO L93 Difference]: Finished difference Result 299 states and 849 transitions. [2021-08-06 14:47:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:47:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:02,831 INFO L225 Difference]: With dead ends: 299 [2021-08-06 14:47:02,831 INFO L226 Difference]: Without dead ends: 288 [2021-08-06 14:47:02,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:47:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-08-06 14:47:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 196. [2021-08-06 14:47:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.830769230769231) internal successors, (552), 195 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) [2021-08-06 14:47:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 552 transitions. [2021-08-06 14:47:02,837 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 552 transitions. Word has length 20 [2021-08-06 14:47:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:02,837 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 552 transitions. [2021-08-06 14:47:02,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 552 transitions. [2021-08-06 14:47:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:02,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:02,838 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:02,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:03,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:03,053 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1927902218, now seen corresponding path program 1 times [2021-08-06 14:47:03,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:03,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351341492] [2021-08-06 14:47:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:03,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:03,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:03,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351341492] [2021-08-06 14:47:03,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351341492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:03,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808887761] [2021-08-06 14:47:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:03,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:03,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:03,199 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) [2021-08-06 14:47:03,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 14:47:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:03,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:03,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:03,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-06 14:47:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:03,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808887761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:03,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:03,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 14:47:03,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551791447] [2021-08-06 14:47:03,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:03,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:03,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:03,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:03,743 INFO L87 Difference]: Start difference. First operand 196 states and 552 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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) [2021-08-06 14:47:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:04,160 INFO L93 Difference]: Finished difference Result 412 states and 1175 transitions. [2021-08-06 14:47:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:47:04,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 20 [2021-08-06 14:47:04,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:04,162 INFO L225 Difference]: With dead ends: 412 [2021-08-06 14:47:04,163 INFO L226 Difference]: Without dead ends: 403 [2021-08-06 14:47:04,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:47:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-08-06 14:47:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 202. [2021-08-06 14:47:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.845771144278607) internal successors, (572), 201 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 572 transitions. [2021-08-06 14:47:04,170 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 572 transitions. Word has length 20 [2021-08-06 14:47:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:04,170 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 572 transitions. [2021-08-06 14:47:04,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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) [2021-08-06 14:47:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 572 transitions. [2021-08-06 14:47:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:04,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:04,171 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:04,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:04,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:04,393 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash 475594560, now seen corresponding path program 2 times [2021-08-06 14:47:04,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:04,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336890444] [2021-08-06 14:47:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:04,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:04,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:04,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336890444] [2021-08-06 14:47:04,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336890444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:04,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594098861] [2021-08-06 14:47:04,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:47:04,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:04,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:04,569 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) [2021-08-06 14:47:04,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 14:47:04,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:04,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:04,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:47:04,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:05,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:05,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-08-06 14:47:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:05,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594098861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:05,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:05,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 14:47:05,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973340305] [2021-08-06 14:47:05,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:47:05,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:47:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:47:05,316 INFO L87 Difference]: Start difference. First operand 202 states and 572 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-08-06 14:47:06,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:06,174 INFO L93 Difference]: Finished difference Result 389 states and 1125 transitions. [2021-08-06 14:47:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:47:06,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 20 [2021-08-06 14:47:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:06,176 INFO L225 Difference]: With dead ends: 389 [2021-08-06 14:47:06,176 INFO L226 Difference]: Without dead ends: 380 [2021-08-06 14:47:06,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 717.3ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:47:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-08-06 14:47:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 205. [2021-08-06 14:47:06,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.8529411764705883) internal successors, (582), 204 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 582 transitions. [2021-08-06 14:47:06,183 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 582 transitions. Word has length 20 [2021-08-06 14:47:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:06,184 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 582 transitions. [2021-08-06 14:47:06,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2021-08-06 14:47:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 582 transitions. [2021-08-06 14:47:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:06,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:06,185 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:06,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:06,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:06,401 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1411001128, now seen corresponding path program 3 times [2021-08-06 14:47:06,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:06,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478452270] [2021-08-06 14:47:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:06,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:06,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:06,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478452270] [2021-08-06 14:47:06,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478452270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:06,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161770203] [2021-08-06 14:47:06,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:47:06,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:06,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:06,534 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) [2021-08-06 14:47:06,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 14:47:06,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:47:06,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:06,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:47:06,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:06,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:06,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 14:47:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:07,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161770203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:07,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:07,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-06 14:47:07,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561255777] [2021-08-06 14:47:07,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:47:07,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:07,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:47:07,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:07,276 INFO L87 Difference]: Start difference. First operand 205 states and 582 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-08-06 14:47:08,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:08,078 INFO L93 Difference]: Finished difference Result 358 states and 1032 transitions. [2021-08-06 14:47:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:47:08,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 20 [2021-08-06 14:47:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:08,082 INFO L225 Difference]: With dead ends: 358 [2021-08-06 14:47:08,082 INFO L226 Difference]: Without dead ends: 349 [2021-08-06 14:47:08,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 662.9ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:47:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-06 14:47:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 208. [2021-08-06 14:47:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.859903381642512) internal successors, (592), 207 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 592 transitions. [2021-08-06 14:47:08,088 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 592 transitions. Word has length 20 [2021-08-06 14:47:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:08,088 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 592 transitions. [2021-08-06 14:47:08,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-08-06 14:47:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 592 transitions. [2021-08-06 14:47:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:08,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:08,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:08,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:08,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 14:47:08,313 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash -342712452, now seen corresponding path program 4 times [2021-08-06 14:47:08,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:08,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805433064] [2021-08-06 14:47:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:08,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:08,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:08,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805433064] [2021-08-06 14:47:08,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805433064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:08,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844457252] [2021-08-06 14:47:08,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:47:08,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:08,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:08,481 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) [2021-08-06 14:47:08,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 14:47:08,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:47:08,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:08,976 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:08,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:09,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844457252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:09,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:09,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:09,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189040607] [2021-08-06 14:47:09,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:09,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:09,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:09,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:09,127 INFO L87 Difference]: Start difference. First operand 208 states and 592 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:09,433 INFO L93 Difference]: Finished difference Result 307 states and 886 transitions. [2021-08-06 14:47:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:47:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:09,436 INFO L225 Difference]: With dead ends: 307 [2021-08-06 14:47:09,436 INFO L226 Difference]: Without dead ends: 296 [2021-08-06 14:47:09,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:47:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-08-06 14:47:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 210. [2021-08-06 14:47:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.8660287081339715) internal successors, (599), 209 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 599 transitions. [2021-08-06 14:47:09,444 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 599 transitions. Word has length 20 [2021-08-06 14:47:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:09,444 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 599 transitions. [2021-08-06 14:47:09,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 599 transitions. [2021-08-06 14:47:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:09,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:09,445 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:09,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:09,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 14:47:09,661 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:09,661 INFO L82 PathProgramCache]: Analyzing trace with hash -285788795, now seen corresponding path program 5 times [2021-08-06 14:47:09,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:09,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391102445] [2021-08-06 14:47:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:09,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:09,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:09,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391102445] [2021-08-06 14:47:09,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391102445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:09,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062979304] [2021-08-06 14:47:09,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:47:09,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:09,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:09,814 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) [2021-08-06 14:47:09,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 14:47:10,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:10,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:10,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:10,554 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:10,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 19 [2021-08-06 14:47:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:10,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062979304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:10,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:10,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 14:47:10,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354881759] [2021-08-06 14:47:10,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:47:10,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:10,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:47:10,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:47:10,625 INFO L87 Difference]: Start difference. First operand 210 states and 599 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-08-06 14:47:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:10,879 INFO L93 Difference]: Finished difference Result 320 states and 914 transitions. [2021-08-06 14:47:10,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:47:10,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20 [2021-08-06 14:47:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:10,881 INFO L225 Difference]: With dead ends: 320 [2021-08-06 14:47:10,881 INFO L226 Difference]: Without dead ends: 310 [2021-08-06 14:47:10,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:47:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-08-06 14:47:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 216. [2021-08-06 14:47:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.8651162790697673) internal successors, (616), 215 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 616 transitions. [2021-08-06 14:47:10,888 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 616 transitions. Word has length 20 [2021-08-06 14:47:10,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:10,888 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 616 transitions. [2021-08-06 14:47:10,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-08-06 14:47:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 616 transitions. [2021-08-06 14:47:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:10,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:10,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:10,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:11,112 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,SelfDestructingSolverStorable23 [2021-08-06 14:47:11,112 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:11,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:11,112 INFO L82 PathProgramCache]: Analyzing trace with hash -71927975, now seen corresponding path program 6 times [2021-08-06 14:47:11,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:11,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413823999] [2021-08-06 14:47:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:11,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:11,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:11,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413823999] [2021-08-06 14:47:11,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413823999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:11,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590721559] [2021-08-06 14:47:11,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:47:11,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:11,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:11,240 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) [2021-08-06 14:47:11,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 14:47:11,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:47:11,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:11,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:47:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:11,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:11,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 14:47:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:12,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590721559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:12,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:12,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-06 14:47:12,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984841992] [2021-08-06 14:47:12,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:47:12,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:47:12,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:12,030 INFO L87 Difference]: Start difference. First operand 216 states and 616 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-08-06 14:47:12,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:12,836 INFO L93 Difference]: Finished difference Result 384 states and 1113 transitions. [2021-08-06 14:47:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:47:12,836 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 20 [2021-08-06 14:47:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:12,838 INFO L225 Difference]: With dead ends: 384 [2021-08-06 14:47:12,838 INFO L226 Difference]: Without dead ends: 374 [2021-08-06 14:47:12,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 676.8ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:47:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-08-06 14:47:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 219. [2021-08-06 14:47:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.86697247706422) internal successors, (625), 218 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 625 transitions. [2021-08-06 14:47:12,845 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 625 transitions. Word has length 20 [2021-08-06 14:47:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:12,845 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 625 transitions. [2021-08-06 14:47:12,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-08-06 14:47:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 625 transitions. [2021-08-06 14:47:12,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:12,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:12,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:12,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:13,060 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,SelfDestructingSolverStorable24 [2021-08-06 14:47:13,061 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash -905666415, now seen corresponding path program 7 times [2021-08-06 14:47:13,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:13,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527003643] [2021-08-06 14:47:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:13,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:13,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:13,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527003643] [2021-08-06 14:47:13,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527003643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:13,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809247688] [2021-08-06 14:47:13,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:47:13,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:13,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:13,193 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) [2021-08-06 14:47:13,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 14:47:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:13,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:13,750 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:13,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:13,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809247688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:13,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:13,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:13,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546806000] [2021-08-06 14:47:13,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:13,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:13,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:13,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:13,905 INFO L87 Difference]: Start difference. First operand 219 states and 625 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:14,044 INFO L93 Difference]: Finished difference Result 297 states and 849 transitions. [2021-08-06 14:47:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:14,046 INFO L225 Difference]: With dead ends: 297 [2021-08-06 14:47:14,046 INFO L226 Difference]: Without dead ends: 286 [2021-08-06 14:47:14,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-06 14:47:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 213. [2021-08-06 14:47:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.8632075471698113) internal successors, (607), 212 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 607 transitions. [2021-08-06 14:47:14,050 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 607 transitions. Word has length 20 [2021-08-06 14:47:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:14,050 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 607 transitions. [2021-08-06 14:47:14,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 607 transitions. [2021-08-06 14:47:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:14,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:14,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:14,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-06 14:47:14,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:14,273 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:14,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:14,273 INFO L82 PathProgramCache]: Analyzing trace with hash -149178578, now seen corresponding path program 5 times [2021-08-06 14:47:14,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:14,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804395634] [2021-08-06 14:47:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:14,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:14,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:14,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804395634] [2021-08-06 14:47:14,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804395634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:14,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530301603] [2021-08-06 14:47:14,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:47:14,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:14,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:14,435 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) [2021-08-06 14:47:14,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 14:47:14,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:14,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:14,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:14,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:15,195 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:15,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 19 [2021-08-06 14:47:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:15,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530301603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:15,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:15,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 14:47:15,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88841650] [2021-08-06 14:47:15,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:47:15,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:47:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:47:15,268 INFO L87 Difference]: Start difference. First operand 213 states and 607 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-08-06 14:47:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:15,546 INFO L93 Difference]: Finished difference Result 309 states and 882 transitions. [2021-08-06 14:47:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:47:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20 [2021-08-06 14:47:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:15,548 INFO L225 Difference]: With dead ends: 309 [2021-08-06 14:47:15,548 INFO L226 Difference]: Without dead ends: 300 [2021-08-06 14:47:15,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:47:15,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-06 14:47:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 216. [2021-08-06 14:47:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.869767441860465) internal successors, (617), 215 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 617 transitions. [2021-08-06 14:47:15,553 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 617 transitions. Word has length 20 [2021-08-06 14:47:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:15,553 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 617 transitions. [2021-08-06 14:47:15,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-08-06 14:47:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 617 transitions. [2021-08-06 14:47:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:15,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:15,554 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:15,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:15,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 14:47:15,765 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:15,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2035774266, now seen corresponding path program 6 times [2021-08-06 14:47:15,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:15,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734160422] [2021-08-06 14:47:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:15,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:15,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:15,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734160422] [2021-08-06 14:47:15,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734160422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:15,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692941067] [2021-08-06 14:47:15,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:47:15,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:15,885 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) [2021-08-06 14:47:15,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 14:47:16,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:47:16,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:47:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:16,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:16,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 14:47:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:16,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692941067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:16,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:16,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-06 14:47:16,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139393323] [2021-08-06 14:47:16,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:47:16,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:47:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:16,775 INFO L87 Difference]: Start difference. First operand 216 states and 617 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-08-06 14:47:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:17,544 INFO L93 Difference]: Finished difference Result 371 states and 1070 transitions. [2021-08-06 14:47:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:47:17,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 20 [2021-08-06 14:47:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:17,545 INFO L225 Difference]: With dead ends: 371 [2021-08-06 14:47:17,545 INFO L226 Difference]: Without dead ends: 362 [2021-08-06 14:47:17,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:47:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-06 14:47:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 219. [2021-08-06 14:47:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.876146788990826) internal successors, (627), 218 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 627 transitions. [2021-08-06 14:47:17,551 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 627 transitions. Word has length 20 [2021-08-06 14:47:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 627 transitions. [2021-08-06 14:47:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-08-06 14:47:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 627 transitions. [2021-08-06 14:47:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:17,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:17,552 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:17,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-06 14:47:17,768 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,SelfDestructingSolverStorable27 [2021-08-06 14:47:17,769 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash -967485590, now seen corresponding path program 7 times [2021-08-06 14:47:17,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:17,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922959632] [2021-08-06 14:47:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:17,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:17,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:17,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922959632] [2021-08-06 14:47:17,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922959632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:17,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431329542] [2021-08-06 14:47:17,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:47:17,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:17,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:17,898 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) [2021-08-06 14:47:17,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 14:47:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:18,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:18,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:18,544 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:18,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:18,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431329542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:18,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:18,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:18,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328118324] [2021-08-06 14:47:18,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:18,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:18,669 INFO L87 Difference]: Start difference. First operand 219 states and 627 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:18,857 INFO L93 Difference]: Finished difference Result 292 states and 838 transitions. [2021-08-06 14:47:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:18,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:18,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:18,859 INFO L225 Difference]: With dead ends: 292 [2021-08-06 14:47:18,859 INFO L226 Difference]: Without dead ends: 281 [2021-08-06 14:47:18,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-06 14:47:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 213. [2021-08-06 14:47:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.8632075471698113) internal successors, (607), 212 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 607 transitions. [2021-08-06 14:47:18,864 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 607 transitions. Word has length 20 [2021-08-06 14:47:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:18,864 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 607 transitions. [2021-08-06 14:47:18,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 607 transitions. [2021-08-06 14:47:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:18,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:18,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:18,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:19,088 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,SelfDestructingSolverStorable28 [2021-08-06 14:47:19,088 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash -353300289, now seen corresponding path program 8 times [2021-08-06 14:47:19,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:19,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810182403] [2021-08-06 14:47:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:19,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:19,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:19,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810182403] [2021-08-06 14:47:19,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810182403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:19,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243793907] [2021-08-06 14:47:19,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:47:19,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:19,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:19,190 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) [2021-08-06 14:47:19,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 14:47:19,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:19,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:19,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:19,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:19,784 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:19,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:19,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243793907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:19,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:19,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:19,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785787314] [2021-08-06 14:47:19,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:19,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:19,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:19,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:19,941 INFO L87 Difference]: Start difference. First operand 213 states and 607 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2021-08-06 14:47:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:20,161 INFO L93 Difference]: Finished difference Result 311 states and 891 transitions. [2021-08-06 14:47:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:47:20,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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 20 [2021-08-06 14:47:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:20,163 INFO L225 Difference]: With dead ends: 311 [2021-08-06 14:47:20,163 INFO L226 Difference]: Without dead ends: 301 [2021-08-06 14:47:20,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:47:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-08-06 14:47:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 219. [2021-08-06 14:47:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.8623853211009176) internal successors, (624), 218 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 624 transitions. [2021-08-06 14:47:20,167 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 624 transitions. Word has length 20 [2021-08-06 14:47:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:20,167 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 624 transitions. [2021-08-06 14:47:20,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2021-08-06 14:47:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 624 transitions. [2021-08-06 14:47:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:20,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:20,168 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:20,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:20,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:20,385 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash 214268651, now seen corresponding path program 9 times [2021-08-06 14:47:20,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:20,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108554928] [2021-08-06 14:47:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:20,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:20,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:20,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108554928] [2021-08-06 14:47:20,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108554928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:20,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796471738] [2021-08-06 14:47:20,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:47:20,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:20,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:20,492 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) [2021-08-06 14:47:20,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 14:47:20,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:47:20,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:20,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:21,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:21,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 14:47:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:21,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796471738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:21,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:21,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:47:21,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721663895] [2021-08-06 14:47:21,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:47:21,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:21,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:47:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:47:21,295 INFO L87 Difference]: Start difference. First operand 219 states and 624 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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) [2021-08-06 14:47:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:21,646 INFO L93 Difference]: Finished difference Result 314 states and 899 transitions. [2021-08-06 14:47:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:47:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 20 [2021-08-06 14:47:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:21,647 INFO L225 Difference]: With dead ends: 314 [2021-08-06 14:47:21,647 INFO L226 Difference]: Without dead ends: 303 [2021-08-06 14:47:21,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:47:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-06 14:47:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 216. [2021-08-06 14:47:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.86046511627907) internal successors, (615), 215 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 615 transitions. [2021-08-06 14:47:21,653 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 615 transitions. Word has length 20 [2021-08-06 14:47:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:21,653 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 615 transitions. [2021-08-06 14:47:21,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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) [2021-08-06 14:47:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 615 transitions. [2021-08-06 14:47:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:21,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:21,654 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:21,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:21,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:21,873 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:21,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1590769142, now seen corresponding path program 8 times [2021-08-06 14:47:21,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:21,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950655799] [2021-08-06 14:47:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:21,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:21,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:21,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950655799] [2021-08-06 14:47:21,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950655799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:21,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449970036] [2021-08-06 14:47:21,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:47:21,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:21,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:21,983 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) [2021-08-06 14:47:22,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 14:47:22,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:22,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:22,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:22,671 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:22,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:22,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449970036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:22,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:22,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:22,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991617717] [2021-08-06 14:47:22,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:22,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:22,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:22,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:22,833 INFO L87 Difference]: Start difference. First operand 216 states and 615 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2021-08-06 14:47:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:22,989 INFO L93 Difference]: Finished difference Result 299 states and 855 transitions. [2021-08-06 14:47:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:47:22,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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 20 [2021-08-06 14:47:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:22,991 INFO L225 Difference]: With dead ends: 299 [2021-08-06 14:47:22,991 INFO L226 Difference]: Without dead ends: 290 [2021-08-06 14:47:22,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:47:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-08-06 14:47:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 219. [2021-08-06 14:47:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.86697247706422) internal successors, (625), 218 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 625 transitions. [2021-08-06 14:47:22,996 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 625 transitions. Word has length 20 [2021-08-06 14:47:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:22,996 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 625 transitions. [2021-08-06 14:47:22,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2021-08-06 14:47:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 625 transitions. [2021-08-06 14:47:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:22,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:22,996 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:23,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 14:47:23,200 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,SelfDestructingSolverStorable31 [2021-08-06 14:47:23,201 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1635909478, now seen corresponding path program 9 times [2021-08-06 14:47:23,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:23,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611724286] [2021-08-06 14:47:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:23,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:23,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:23,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611724286] [2021-08-06 14:47:23,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611724286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:23,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295439383] [2021-08-06 14:47:23,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:47:23,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:23,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:23,305 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) [2021-08-06 14:47:23,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 14:47:23,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:47:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:23,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:23,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:23,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 14:47:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:24,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295439383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:24,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:24,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:47:24,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181518282] [2021-08-06 14:47:24,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:47:24,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:24,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:47:24,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:47:24,194 INFO L87 Difference]: Start difference. First operand 219 states and 625 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-08-06 14:47:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:24,574 INFO L93 Difference]: Finished difference Result 305 states and 875 transitions. [2021-08-06 14:47:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:47:24,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:24,576 INFO L225 Difference]: With dead ends: 305 [2021-08-06 14:47:24,576 INFO L226 Difference]: Without dead ends: 294 [2021-08-06 14:47:24,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:47:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-06 14:47:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 216. [2021-08-06 14:47:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.86046511627907) internal successors, (615), 215 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 615 transitions. [2021-08-06 14:47:24,580 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 615 transitions. Word has length 20 [2021-08-06 14:47:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:24,580 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 615 transitions. [2021-08-06 14:47:24,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-08-06 14:47:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 615 transitions. [2021-08-06 14:47:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:24,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:24,580 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:24,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:24,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 14:47:24,781 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:24,781 INFO L82 PathProgramCache]: Analyzing trace with hash -805583803, now seen corresponding path program 10 times [2021-08-06 14:47:24,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:24,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92689868] [2021-08-06 14:47:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:24,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:24,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:24,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92689868] [2021-08-06 14:47:24,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92689868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:24,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718226113] [2021-08-06 14:47:24,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:47:24,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:24,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:24,896 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) [2021-08-06 14:47:24,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 14:47:25,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:47:25,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:25,617 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:25,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:25,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718226113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:25,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:25,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:25,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23745652] [2021-08-06 14:47:25,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:25,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:25,738 INFO L87 Difference]: Start difference. First operand 216 states and 615 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-08-06 14:47:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:25,912 INFO L93 Difference]: Finished difference Result 313 states and 896 transitions. [2021-08-06 14:47:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:47:25,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 20 [2021-08-06 14:47:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:25,914 INFO L225 Difference]: With dead ends: 313 [2021-08-06 14:47:25,914 INFO L226 Difference]: Without dead ends: 302 [2021-08-06 14:47:25,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:47:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-06 14:47:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 222. [2021-08-06 14:47:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.8552036199095023) internal successors, (631), 221 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 631 transitions. [2021-08-06 14:47:25,924 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 631 transitions. Word has length 20 [2021-08-06 14:47:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:25,925 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 631 transitions. [2021-08-06 14:47:25,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-08-06 14:47:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 631 transitions. [2021-08-06 14:47:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:25,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:25,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:25,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:26,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:26,153 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash -881419218, now seen corresponding path program 10 times [2021-08-06 14:47:26,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:26,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397631892] [2021-08-06 14:47:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:26,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:26,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:26,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397631892] [2021-08-06 14:47:26,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397631892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:26,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647357241] [2021-08-06 14:47:26,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:47:26,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:26,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:26,273 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) [2021-08-06 14:47:26,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 14:47:26,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:47:26,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:26,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:26,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:27,063 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:27,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:27,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647357241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:27,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:27,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:27,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416223501] [2021-08-06 14:47:27,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:27,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:27,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:27,201 INFO L87 Difference]: Start difference. First operand 222 states and 631 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:27,407 INFO L93 Difference]: Finished difference Result 304 states and 872 transitions. [2021-08-06 14:47:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:47:27,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:27,408 INFO L225 Difference]: With dead ends: 304 [2021-08-06 14:47:27,408 INFO L226 Difference]: Without dead ends: 293 [2021-08-06 14:47:27,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:47:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-06 14:47:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 222. [2021-08-06 14:47:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.8552036199095023) internal successors, (631), 221 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 631 transitions. [2021-08-06 14:47:27,418 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 631 transitions. Word has length 20 [2021-08-06 14:47:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:27,418 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 631 transitions. [2021-08-06 14:47:27,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 631 transitions. [2021-08-06 14:47:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:27,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:27,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:27,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-06 14:47:27,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:27,637 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:27,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2099652405, now seen corresponding path program 11 times [2021-08-06 14:47:27,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:27,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895558960] [2021-08-06 14:47:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:27,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:27,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:27,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895558960] [2021-08-06 14:47:27,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895558960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:27,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125231460] [2021-08-06 14:47:27,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:47:27,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:27,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:27,793 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) [2021-08-06 14:47:27,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 14:47:28,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:28,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:28,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:28,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:28,777 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:28,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:28,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125231460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:28,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:28,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 14:47:28,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608640319] [2021-08-06 14:47:28,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:47:28,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:47:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:47:28,836 INFO L87 Difference]: Start difference. First operand 222 states and 631 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-08-06 14:47:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:29,068 INFO L93 Difference]: Finished difference Result 339 states and 963 transitions. [2021-08-06 14:47:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:47:29,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:29,070 INFO L225 Difference]: With dead ends: 339 [2021-08-06 14:47:29,070 INFO L226 Difference]: Without dead ends: 329 [2021-08-06 14:47:29,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:47:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-08-06 14:47:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 225. [2021-08-06 14:47:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.857142857142857) internal successors, (640), 224 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 640 transitions. [2021-08-06 14:47:29,075 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 640 transitions. Word has length 20 [2021-08-06 14:47:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:29,075 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 640 transitions. [2021-08-06 14:47:29,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-08-06 14:47:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 640 transitions. [2021-08-06 14:47:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:29,076 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:29,076 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:29,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 14:47:29,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 14:47:29,293 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1481560959, now seen corresponding path program 12 times [2021-08-06 14:47:29,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:29,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208755745] [2021-08-06 14:47:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:29,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:29,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:29,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208755745] [2021-08-06 14:47:29,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208755745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:29,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606523167] [2021-08-06 14:47:29,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:47:29,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:29,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:29,396 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) [2021-08-06 14:47:29,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 14:47:30,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:47:30,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:30,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:47:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:30,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:30,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 14:47:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:30,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606523167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:30,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:30,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-06 14:47:30,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811376053] [2021-08-06 14:47:30,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:47:30,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:47:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:30,493 INFO L87 Difference]: Start difference. First operand 225 states and 640 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-08-06 14:47:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:31,113 INFO L93 Difference]: Finished difference Result 372 states and 1066 transitions. [2021-08-06 14:47:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:47:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:31,114 INFO L225 Difference]: With dead ends: 372 [2021-08-06 14:47:31,114 INFO L226 Difference]: Without dead ends: 362 [2021-08-06 14:47:31,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:47:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-06 14:47:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 228. [2021-08-06 14:47:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.859030837004405) internal successors, (649), 227 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 649 transitions. [2021-08-06 14:47:31,121 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 649 transitions. Word has length 20 [2021-08-06 14:47:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:31,121 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 649 transitions. [2021-08-06 14:47:31,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-08-06 14:47:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 649 transitions. [2021-08-06 14:47:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:31,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:31,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:31,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:31,340 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,SelfDestructingSolverStorable36 [2021-08-06 14:47:31,340 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:31,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1979667897, now seen corresponding path program 13 times [2021-08-06 14:47:31,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:31,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889907645] [2021-08-06 14:47:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:31,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:31,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:31,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889907645] [2021-08-06 14:47:31,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889907645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:31,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650174187] [2021-08-06 14:47:31,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:47:31,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:31,469 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) [2021-08-06 14:47:31,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 14:47:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:32,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:32,310 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:32,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:32,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650174187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:32,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:32,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:32,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355963068] [2021-08-06 14:47:32,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:32,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:32,466 INFO L87 Difference]: Start difference. First operand 228 states and 649 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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) [2021-08-06 14:47:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:32,616 INFO L93 Difference]: Finished difference Result 316 states and 898 transitions. [2021-08-06 14:47:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 20 [2021-08-06 14:47:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:32,617 INFO L225 Difference]: With dead ends: 316 [2021-08-06 14:47:32,618 INFO L226 Difference]: Without dead ends: 305 [2021-08-06 14:47:32,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-08-06 14:47:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 222. [2021-08-06 14:47:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.8552036199095023) internal successors, (631), 221 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 631 transitions. [2021-08-06 14:47:32,624 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 631 transitions. Word has length 20 [2021-08-06 14:47:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:32,624 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 631 transitions. [2021-08-06 14:47:32,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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) [2021-08-06 14:47:32,624 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 631 transitions. [2021-08-06 14:47:32,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:32,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:32,625 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:32,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 14:47:32,832 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,SelfDestructingSolverStorable37 [2021-08-06 14:47:32,833 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2061801888, now seen corresponding path program 11 times [2021-08-06 14:47:32,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:32,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462391289] [2021-08-06 14:47:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:32,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:32,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:32,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462391289] [2021-08-06 14:47:32,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462391289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:32,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071070268] [2021-08-06 14:47:32,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:47:32,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:32,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:32,979 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) [2021-08-06 14:47:32,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 14:47:33,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:33,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:33,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:33,998 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:33,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:34,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071070268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:34,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:34,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 14:47:34,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248723068] [2021-08-06 14:47:34,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:47:34,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:47:34,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:47:34,071 INFO L87 Difference]: Start difference. First operand 222 states and 631 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-08-06 14:47:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:34,303 INFO L93 Difference]: Finished difference Result 328 states and 931 transitions. [2021-08-06 14:47:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:47:34,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:34,305 INFO L225 Difference]: With dead ends: 328 [2021-08-06 14:47:34,305 INFO L226 Difference]: Without dead ends: 319 [2021-08-06 14:47:34,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:47:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-06 14:47:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 225. [2021-08-06 14:47:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.861607142857143) internal successors, (641), 224 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 641 transitions. [2021-08-06 14:47:34,309 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 641 transitions. Word has length 20 [2021-08-06 14:47:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:34,310 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 641 transitions. [2021-08-06 14:47:34,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-08-06 14:47:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 641 transitions. [2021-08-06 14:47:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:34,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:34,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:34,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-06 14:47:34,534 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,SelfDestructingSolverStorable38 [2021-08-06 14:47:34,534 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:34,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:34,535 INFO L82 PathProgramCache]: Analyzing trace with hash 175206200, now seen corresponding path program 12 times [2021-08-06 14:47:34,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:34,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137080647] [2021-08-06 14:47:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:34,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:34,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:34,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137080647] [2021-08-06 14:47:34,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137080647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:34,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932284655] [2021-08-06 14:47:34,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:47:34,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:34,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:34,653 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) [2021-08-06 14:47:34,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 14:47:35,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:47:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:35,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:47:35,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:35,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:35,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 14:47:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:35,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932284655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:35,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:35,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-06 14:47:35,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602392927] [2021-08-06 14:47:35,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:47:35,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:35,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:47:35,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:35,802 INFO L87 Difference]: Start difference. First operand 225 states and 641 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-08-06 14:47:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:36,457 INFO L93 Difference]: Finished difference Result 368 states and 1047 transitions. [2021-08-06 14:47:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:47:36,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:36,458 INFO L225 Difference]: With dead ends: 368 [2021-08-06 14:47:36,459 INFO L226 Difference]: Without dead ends: 359 [2021-08-06 14:47:36,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:47:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-06 14:47:36,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 228. [2021-08-06 14:47:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.86784140969163) internal successors, (651), 227 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 651 transitions. [2021-08-06 14:47:36,464 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 651 transitions. Word has length 20 [2021-08-06 14:47:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:36,464 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 651 transitions. [2021-08-06 14:47:36,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-08-06 14:47:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 651 transitions. [2021-08-06 14:47:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:36,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:36,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:36,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:36,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 14:47:36,681 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:36,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:36,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1243494876, now seen corresponding path program 13 times [2021-08-06 14:47:36,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:36,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124094151] [2021-08-06 14:47:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:36,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:36,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:36,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124094151] [2021-08-06 14:47:36,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124094151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:36,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741344447] [2021-08-06 14:47:36,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:47:36,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:36,795 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) [2021-08-06 14:47:36,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 14:47:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:37,735 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:37,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:37,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741344447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:37,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:37,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:37,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659547991] [2021-08-06 14:47:37,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:37,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:37,872 INFO L87 Difference]: Start difference. First operand 228 states and 651 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:47:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:38,042 INFO L93 Difference]: Finished difference Result 311 states and 887 transitions. [2021-08-06 14:47:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:38,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 20 [2021-08-06 14:47:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:38,044 INFO L225 Difference]: With dead ends: 311 [2021-08-06 14:47:38,044 INFO L226 Difference]: Without dead ends: 300 [2021-08-06 14:47:38,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-06 14:47:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 222. [2021-08-06 14:47:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.8552036199095023) internal successors, (631), 221 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 631 transitions. [2021-08-06 14:47:38,052 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 631 transitions. Word has length 20 [2021-08-06 14:47:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:38,052 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 631 transitions. [2021-08-06 14:47:38,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:47:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 631 transitions. [2021-08-06 14:47:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:38,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:38,053 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:38,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:38,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:38,273 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1857680177, now seen corresponding path program 14 times [2021-08-06 14:47:38,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:38,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519779082] [2021-08-06 14:47:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:38,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:38,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:38,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519779082] [2021-08-06 14:47:38,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519779082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:38,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851750048] [2021-08-06 14:47:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:47:38,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:38,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:38,395 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) [2021-08-06 14:47:38,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 14:47:39,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:39,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:39,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:39,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:39,321 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:39,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:39,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851750048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:39,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:39,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:39,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64368213] [2021-08-06 14:47:39,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:39,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:39,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:39,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:39,476 INFO L87 Difference]: Start difference. First operand 222 states and 631 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2021-08-06 14:47:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:39,647 INFO L93 Difference]: Finished difference Result 330 states and 940 transitions. [2021-08-06 14:47:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:39,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:39,648 INFO L225 Difference]: With dead ends: 330 [2021-08-06 14:47:39,648 INFO L226 Difference]: Without dead ends: 320 [2021-08-06 14:47:39,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-06 14:47:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 228. [2021-08-06 14:47:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.854625550660793) internal successors, (648), 227 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 648 transitions. [2021-08-06 14:47:39,652 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 648 transitions. Word has length 20 [2021-08-06 14:47:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:39,652 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 648 transitions. [2021-08-06 14:47:39,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2021-08-06 14:47:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 648 transitions. [2021-08-06 14:47:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:39,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:39,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:39,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 14:47:39,853 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,SelfDestructingSolverStorable41 [2021-08-06 14:47:39,854 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:39,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1869718179, now seen corresponding path program 15 times [2021-08-06 14:47:39,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:39,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892201172] [2021-08-06 14:47:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:39,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:39,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:39,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892201172] [2021-08-06 14:47:39,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892201172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:39,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393818366] [2021-08-06 14:47:39,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:47:39,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:39,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:39,959 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) [2021-08-06 14:47:39,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 14:47:40,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:47:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:40,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:40,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-08-06 14:47:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:41,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393818366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:41,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:41,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 14:47:41,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157238481] [2021-08-06 14:47:41,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:47:41,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:41,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:47:41,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:47:41,257 INFO L87 Difference]: Start difference. First operand 228 states and 648 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:41,810 INFO L93 Difference]: Finished difference Result 333 states and 948 transitions. [2021-08-06 14:47:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:47:41,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:41,812 INFO L225 Difference]: With dead ends: 333 [2021-08-06 14:47:41,812 INFO L226 Difference]: Without dead ends: 322 [2021-08-06 14:47:41,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 431.1ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:47:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-06 14:47:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 225. [2021-08-06 14:47:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.8526785714285716) internal successors, (639), 224 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 639 transitions. [2021-08-06 14:47:41,816 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 639 transitions. Word has length 20 [2021-08-06 14:47:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:41,816 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 639 transitions. [2021-08-06 14:47:41,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 639 transitions. [2021-08-06 14:47:41,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:41,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:41,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:41,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 14:47:42,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:42,021 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:42,021 INFO L82 PathProgramCache]: Analyzing trace with hash -493217688, now seen corresponding path program 14 times [2021-08-06 14:47:42,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:42,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388325828] [2021-08-06 14:47:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:42,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:42,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:42,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388325828] [2021-08-06 14:47:42,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388325828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:42,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571372844] [2021-08-06 14:47:42,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:47:42,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:42,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:42,139 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) [2021-08-06 14:47:42,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 14:47:42,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:42,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:43,135 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:43,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:43,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571372844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:43,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:43,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:43,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270489084] [2021-08-06 14:47:43,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:43,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:43,313 INFO L87 Difference]: Start difference. First operand 225 states and 639 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2021-08-06 14:47:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:43,501 INFO L93 Difference]: Finished difference Result 318 states and 904 transitions. [2021-08-06 14:47:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:43,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:43,502 INFO L225 Difference]: With dead ends: 318 [2021-08-06 14:47:43,502 INFO L226 Difference]: Without dead ends: 309 [2021-08-06 14:47:43,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-06 14:47:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 228. [2021-08-06 14:47:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.859030837004405) internal successors, (649), 227 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 649 transitions. [2021-08-06 14:47:43,507 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 649 transitions. Word has length 20 [2021-08-06 14:47:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:43,507 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 649 transitions. [2021-08-06 14:47:43,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2021-08-06 14:47:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 649 transitions. [2021-08-06 14:47:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:43,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:43,508 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:43,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:43,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:43,716 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:43,717 INFO L82 PathProgramCache]: Analyzing trace with hash 575070988, now seen corresponding path program 15 times [2021-08-06 14:47:43,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:43,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662341346] [2021-08-06 14:47:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:43,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:43,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:43,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662341346] [2021-08-06 14:47:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662341346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:43,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143204772] [2021-08-06 14:47:43,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:47:43,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:43,826 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) [2021-08-06 14:47:43,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 14:47:44,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:47:44,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:44,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:44,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:44,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:44,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-08-06 14:47:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:45,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143204772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:45,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:45,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 14:47:45,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060758771] [2021-08-06 14:47:45,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:47:45,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:47:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:47:45,165 INFO L87 Difference]: Start difference. First operand 228 states and 649 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2021-08-06 14:47:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:45,604 INFO L93 Difference]: Finished difference Result 324 states and 924 transitions. [2021-08-06 14:47:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:47:45,604 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 20 [2021-08-06 14:47:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:45,605 INFO L225 Difference]: With dead ends: 324 [2021-08-06 14:47:45,605 INFO L226 Difference]: Without dead ends: 313 [2021-08-06 14:47:45,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:47:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-06 14:47:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 225. [2021-08-06 14:47:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.8526785714285716) internal successors, (639), 224 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 639 transitions. [2021-08-06 14:47:45,610 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 639 transitions. Word has length 20 [2021-08-06 14:47:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:45,610 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 639 transitions. [2021-08-06 14:47:45,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2021-08-06 14:47:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 639 transitions. [2021-08-06 14:47:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:45,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:45,611 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:45,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 14:47:45,824 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,SelfDestructingSolverStorable44 [2021-08-06 14:47:45,824 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1405396663, now seen corresponding path program 16 times [2021-08-06 14:47:45,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:45,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34615039] [2021-08-06 14:47:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:45,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:45,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:45,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34615039] [2021-08-06 14:47:45,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34615039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:45,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858802760] [2021-08-06 14:47:45,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:47:45,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:45,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:45,922 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) [2021-08-06 14:47:45,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 14:47:46,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:47:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:47,021 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:47,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 19 [2021-08-06 14:47:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:47,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858802760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:47,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:47,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:47,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177721934] [2021-08-06 14:47:47,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:47,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:47,161 INFO L87 Difference]: Start difference. First operand 225 states and 639 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:47,436 INFO L93 Difference]: Finished difference Result 332 states and 945 transitions. [2021-08-06 14:47:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:47,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:47,438 INFO L225 Difference]: With dead ends: 332 [2021-08-06 14:47:47,438 INFO L226 Difference]: Without dead ends: 321 [2021-08-06 14:47:47,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-06 14:47:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2021-08-06 14:47:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.847826086956522) internal successors, (655), 230 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 655 transitions. [2021-08-06 14:47:47,442 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 655 transitions. Word has length 20 [2021-08-06 14:47:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:47,442 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 655 transitions. [2021-08-06 14:47:47,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:47,442 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 655 transitions. [2021-08-06 14:47:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:47,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:47,443 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:47,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:47,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 14:47:47,649 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1329561248, now seen corresponding path program 16 times [2021-08-06 14:47:47,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:47,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679652968] [2021-08-06 14:47:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:47,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:47,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:47,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679652968] [2021-08-06 14:47:47,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679652968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:47,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673416962] [2021-08-06 14:47:47,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:47:47,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:47,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:47,768 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) [2021-08-06 14:47:47,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 14:47:48,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:47:48,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:48,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:48,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:48,918 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:48,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 19 [2021-08-06 14:47:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:49,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673416962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:49,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:49,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:49,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546704801] [2021-08-06 14:47:49,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:49,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:49,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:49,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:49,040 INFO L87 Difference]: Start difference. First operand 231 states and 655 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:47:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:49,314 INFO L93 Difference]: Finished difference Result 323 states and 921 transitions. [2021-08-06 14:47:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:49,314 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 20 [2021-08-06 14:47:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:49,315 INFO L225 Difference]: With dead ends: 323 [2021-08-06 14:47:49,315 INFO L226 Difference]: Without dead ends: 312 [2021-08-06 14:47:49,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:47:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-06 14:47:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 219. [2021-08-06 14:47:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.8577981651376145) internal successors, (623), 218 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 623 transitions. [2021-08-06 14:47:49,319 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 623 transitions. Word has length 20 [2021-08-06 14:47:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:49,320 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 623 transitions. [2021-08-06 14:47:49,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:47:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 623 transitions. [2021-08-06 14:47:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:49,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:49,320 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:49,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 14:47:49,520 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,SelfDestructingSolverStorable46 [2021-08-06 14:47:49,521 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash 377918803, now seen corresponding path program 17 times [2021-08-06 14:47:49,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:49,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919975873] [2021-08-06 14:47:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:49,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:49,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:49,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919975873] [2021-08-06 14:47:49,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919975873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:49,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99664638] [2021-08-06 14:47:49,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:47:49,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:49,637 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) [2021-08-06 14:47:49,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 14:47:50,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:47:50,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:50,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:50,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:50,783 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:50,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:50,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99664638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:50,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:50,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:50,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152407767] [2021-08-06 14:47:50,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:50,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:50,964 INFO L87 Difference]: Start difference. First operand 219 states and 623 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2021-08-06 14:47:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:51,187 INFO L93 Difference]: Finished difference Result 353 states and 1005 transitions. [2021-08-06 14:47:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:47:51,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:51,188 INFO L225 Difference]: With dead ends: 353 [2021-08-06 14:47:51,188 INFO L226 Difference]: Without dead ends: 343 [2021-08-06 14:47:51,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:47:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-08-06 14:47:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 226. [2021-08-06 14:47:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.8533333333333335) internal successors, (642), 225 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 642 transitions. [2021-08-06 14:47:51,193 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 642 transitions. Word has length 20 [2021-08-06 14:47:51,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:51,193 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 642 transitions. [2021-08-06 14:47:51,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2021-08-06 14:47:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 642 transitions. [2021-08-06 14:47:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:51,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:51,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:51,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:51,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:51,408 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1374169437, now seen corresponding path program 18 times [2021-08-06 14:47:51,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:51,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869207057] [2021-08-06 14:47:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:51,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:51,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:51,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869207057] [2021-08-06 14:47:51,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869207057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:51,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580375853] [2021-08-06 14:47:51,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:47:51,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:51,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:51,541 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) [2021-08-06 14:47:51,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 14:47:52,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:47:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:47:52,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:52,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:52,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-08-06 14:47:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:53,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580375853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:53,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:53,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:47:53,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36622248] [2021-08-06 14:47:53,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:47:53,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:47:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:47:53,004 INFO L87 Difference]: Start difference. First operand 226 states and 642 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2021-08-06 14:47:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:53,436 INFO L93 Difference]: Finished difference Result 356 states and 1021 transitions. [2021-08-06 14:47:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:47:53,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:53,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:53,438 INFO L225 Difference]: With dead ends: 356 [2021-08-06 14:47:53,438 INFO L226 Difference]: Without dead ends: 345 [2021-08-06 14:47:53,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:47:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-06 14:47:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 223. [2021-08-06 14:47:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.8513513513513513) internal successors, (633), 222 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 633 transitions. [2021-08-06 14:47:53,443 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 633 transitions. Word has length 20 [2021-08-06 14:47:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:53,443 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 633 transitions. [2021-08-06 14:47:53,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2021-08-06 14:47:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 633 transitions. [2021-08-06 14:47:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:53,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:53,444 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:53,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:53,656 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,SelfDestructingSolverStorable48 [2021-08-06 14:47:53,657 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:53,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1704598050, now seen corresponding path program 17 times [2021-08-06 14:47:53,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:53,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950944143] [2021-08-06 14:47:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:53,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:53,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:53,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950944143] [2021-08-06 14:47:53,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950944143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:53,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191800927] [2021-08-06 14:47:53,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:47:53,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:53,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:53,761 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) [2021-08-06 14:47:53,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 14:47:54,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:47:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:54,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:54,930 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:54,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 14:47:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:55,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191800927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:55,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:55,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:55,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578998302] [2021-08-06 14:47:55,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:55,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:55,091 INFO L87 Difference]: Start difference. First operand 223 states and 633 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2021-08-06 14:47:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:55,287 INFO L93 Difference]: Finished difference Result 338 states and 960 transitions. [2021-08-06 14:47:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:47:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:55,289 INFO L225 Difference]: With dead ends: 338 [2021-08-06 14:47:55,289 INFO L226 Difference]: Without dead ends: 329 [2021-08-06 14:47:55,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:47:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-08-06 14:47:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 226. [2021-08-06 14:47:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.8577777777777778) internal successors, (643), 225 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 643 transitions. [2021-08-06 14:47:55,294 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 643 transitions. Word has length 20 [2021-08-06 14:47:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:55,294 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 643 transitions. [2021-08-06 14:47:55,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2021-08-06 14:47:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 643 transitions. [2021-08-06 14:47:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:55,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:55,295 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:55,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 14:47:55,500 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,SelfDestructingSolverStorable49 [2021-08-06 14:47:55,501 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:55,501 INFO L82 PathProgramCache]: Analyzing trace with hash -636309374, now seen corresponding path program 18 times [2021-08-06 14:47:55,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:55,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759396862] [2021-08-06 14:47:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:55,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:55,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:55,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759396862] [2021-08-06 14:47:55,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759396862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:55,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799955344] [2021-08-06 14:47:55,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:47:55,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:55,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:55,606 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) [2021-08-06 14:47:55,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 14:47:56,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:47:56,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:47:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:56,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:56,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-08-06 14:47:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:57,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799955344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:57,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:57,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:47:57,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838005253] [2021-08-06 14:47:57,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:47:57,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:57,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:47:57,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:47:57,145 INFO L87 Difference]: Start difference. First operand 226 states and 643 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2021-08-06 14:47:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:57,557 INFO L93 Difference]: Finished difference Result 345 states and 990 transitions. [2021-08-06 14:47:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:47:57,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:57,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:57,558 INFO L225 Difference]: With dead ends: 345 [2021-08-06 14:47:57,558 INFO L226 Difference]: Without dead ends: 334 [2021-08-06 14:47:57,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 348.5ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:47:57,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-06 14:47:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 223. [2021-08-06 14:47:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.8513513513513513) internal successors, (633), 222 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 633 transitions. [2021-08-06 14:47:57,563 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 633 transitions. Word has length 20 [2021-08-06 14:47:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:57,563 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 633 transitions. [2021-08-06 14:47:57,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2021-08-06 14:47:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 633 transitions. [2021-08-06 14:47:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:57,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:57,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:57,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 14:47:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:57,781 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash 194016301, now seen corresponding path program 19 times [2021-08-06 14:47:57,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:57,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578797575] [2021-08-06 14:47:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:57,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:57,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:57,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578797575] [2021-08-06 14:47:57,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578797575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:57,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076895410] [2021-08-06 14:47:57,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:47:57,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:57,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:57,893 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) [2021-08-06 14:47:57,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 14:47:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:58,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:47:58,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:59,194 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:47:59,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 19 [2021-08-06 14:47:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:59,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076895410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:59,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:59,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:47:59,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947538430] [2021-08-06 14:47:59,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:47:59,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:59,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:47:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:47:59,308 INFO L87 Difference]: Start difference. First operand 223 states and 633 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:59,548 INFO L93 Difference]: Finished difference Result 349 states and 991 transitions. [2021-08-06 14:47:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:47:59,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:47:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:59,550 INFO L225 Difference]: With dead ends: 349 [2021-08-06 14:47:59,550 INFO L226 Difference]: Without dead ends: 338 [2021-08-06 14:47:59,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:47:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-06 14:47:59,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 229. [2021-08-06 14:47:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.8464912280701755) internal successors, (649), 228 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 649 transitions. [2021-08-06 14:47:59,555 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 649 transitions. Word has length 20 [2021-08-06 14:47:59,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:59,555 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 649 transitions. [2021-08-06 14:47:59,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:47:59,555 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 649 transitions. [2021-08-06 14:47:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:47:59,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:59,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:59,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:59,778 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,SelfDestructingSolverStorable51 [2021-08-06 14:47:59,778 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:47:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash 118180886, now seen corresponding path program 19 times [2021-08-06 14:47:59,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:59,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821615536] [2021-08-06 14:47:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:59,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:59,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:59,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821615536] [2021-08-06 14:47:59,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821615536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:59,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950918349] [2021-08-06 14:47:59,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:47:59,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:59,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:59,895 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) [2021-08-06 14:47:59,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 14:48:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:00,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:48:00,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:01,201 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:48:01,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 19 [2021-08-06 14:48:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:01,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950918349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:01,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:01,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:48:01,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443177441] [2021-08-06 14:48:01,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:48:01,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:48:01,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:48:01,318 INFO L87 Difference]: Start difference. First operand 229 states and 649 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:48:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:01,558 INFO L93 Difference]: Finished difference Result 340 states and 967 transitions. [2021-08-06 14:48:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:48:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 20 [2021-08-06 14:48:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:01,560 INFO L225 Difference]: With dead ends: 340 [2021-08-06 14:48:01,560 INFO L226 Difference]: Without dead ends: 329 [2021-08-06 14:48:01,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:48:01,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-08-06 14:48:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 220. [2021-08-06 14:48:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.853881278538813) internal successors, (625), 219 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 625 transitions. [2021-08-06 14:48:01,564 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 625 transitions. Word has length 20 [2021-08-06 14:48:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:01,564 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 625 transitions. [2021-08-06 14:48:01,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:48:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 625 transitions. [2021-08-06 14:48:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:48:01,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:01,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:01,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 14:48:01,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:01,777 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:01,777 INFO L82 PathProgramCache]: Analyzing trace with hash -426527609, now seen corresponding path program 20 times [2021-08-06 14:48:01,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:01,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131974344] [2021-08-06 14:48:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:01,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:01,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:01,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131974344] [2021-08-06 14:48:01,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131974344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:01,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172635982] [2021-08-06 14:48:01,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:48:01,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:01,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:01,875 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) [2021-08-06 14:48:01,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 14:48:02,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:48:02,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:02,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:48:02,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:03,156 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:48:03,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 19 [2021-08-06 14:48:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:03,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172635982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:03,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:03,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:48:03,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550460792] [2021-08-06 14:48:03,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:48:03,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:03,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:48:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:48:03,277 INFO L87 Difference]: Start difference. First operand 220 states and 625 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:03,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:03,658 INFO L93 Difference]: Finished difference Result 411 states and 1160 transitions. [2021-08-06 14:48:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:48:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:48:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:03,660 INFO L225 Difference]: With dead ends: 411 [2021-08-06 14:48:03,660 INFO L226 Difference]: Without dead ends: 400 [2021-08-06 14:48:03,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-06 14:48:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 228. [2021-08-06 14:48:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.841409691629956) internal successors, (645), 227 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 645 transitions. [2021-08-06 14:48:03,666 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 645 transitions. Word has length 20 [2021-08-06 14:48:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:03,666 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 645 transitions. [2021-08-06 14:48:03,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 645 transitions. [2021-08-06 14:48:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:48:03,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:03,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:03,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 14:48:03,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:03,873 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:03,873 INFO L82 PathProgramCache]: Analyzing trace with hash -493705572, now seen corresponding path program 20 times [2021-08-06 14:48:03,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:03,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42683064] [2021-08-06 14:48:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:03,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:03,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:03,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42683064] [2021-08-06 14:48:03,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42683064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:03,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112914993] [2021-08-06 14:48:03,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:48:03,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:03,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:03,979 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) [2021-08-06 14:48:03,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 14:48:05,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:48:05,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:05,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:48:05,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:05,276 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:48:05,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 19 [2021-08-06 14:48:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:05,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112914993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:05,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:05,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:48:05,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113027038] [2021-08-06 14:48:05,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:48:05,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:05,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:48:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:48:05,399 INFO L87 Difference]: Start difference. First operand 228 states and 645 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:48:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:05,739 INFO L93 Difference]: Finished difference Result 402 states and 1136 transitions. [2021-08-06 14:48:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:48:05,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 20 [2021-08-06 14:48:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:05,741 INFO L225 Difference]: With dead ends: 402 [2021-08-06 14:48:05,741 INFO L226 Difference]: Without dead ends: 391 [2021-08-06 14:48:05,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-06 14:48:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 222. [2021-08-06 14:48:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.8461538461538463) internal successors, (629), 221 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 629 transitions. [2021-08-06 14:48:05,746 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 629 transitions. Word has length 20 [2021-08-06 14:48:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:05,747 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 629 transitions. [2021-08-06 14:48:05,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2021-08-06 14:48:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 629 transitions. [2021-08-06 14:48:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:05,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:05,747 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:05,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:05,966 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,SelfDestructingSolverStorable54 [2021-08-06 14:48:05,966 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:05,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:05,966 INFO L82 PathProgramCache]: Analyzing trace with hash 940655469, now seen corresponding path program 21 times [2021-08-06 14:48:05,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:05,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548820025] [2021-08-06 14:48:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:05,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:06,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:06,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548820025] [2021-08-06 14:48:06,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548820025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:06,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90279383] [2021-08-06 14:48:06,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:48:06,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:06,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:06,005 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) [2021-08-06 14:48:06,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 14:48:07,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:48:07,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:07,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:07,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:07,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90279383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:07,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:07,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:48:07,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474498369] [2021-08-06 14:48:07,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:48:07,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:48:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:48:07,288 INFO L87 Difference]: Start difference. First operand 222 states and 629 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:07,359 INFO L93 Difference]: Finished difference Result 344 states and 968 transitions. [2021-08-06 14:48:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:48:07,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:48:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:07,371 INFO L225 Difference]: With dead ends: 344 [2021-08-06 14:48:07,371 INFO L226 Difference]: Without dead ends: 344 [2021-08-06 14:48:07,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:48:07,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-06 14:48:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 211. [2021-08-06 14:48:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.947619047619048) internal successors, (619), 210 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 619 transitions. [2021-08-06 14:48:07,375 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 619 transitions. Word has length 22 [2021-08-06 14:48:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:07,375 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 619 transitions. [2021-08-06 14:48:07,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 619 transitions. [2021-08-06 14:48:07,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:07,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:07,376 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:07,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:07,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 14:48:07,597 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1281362867, now seen corresponding path program 22 times [2021-08-06 14:48:07,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:07,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42932566] [2021-08-06 14:48:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:07,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:07,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:07,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42932566] [2021-08-06 14:48:07,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42932566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:07,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459460406] [2021-08-06 14:48:07,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:48:07,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:07,652 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) [2021-08-06 14:48:07,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 14:48:08,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:48:08,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:08,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459460406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:08,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:08,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:48:08,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354238181] [2021-08-06 14:48:08,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:48:08,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:08,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:48:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:48:08,922 INFO L87 Difference]: Start difference. First operand 211 states and 619 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:09,014 INFO L93 Difference]: Finished difference Result 362 states and 991 transitions. [2021-08-06 14:48:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:48:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:48:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:09,015 INFO L225 Difference]: With dead ends: 362 [2021-08-06 14:48:09,015 INFO L226 Difference]: Without dead ends: 303 [2021-08-06 14:48:09,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:48:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-06 14:48:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 211. [2021-08-06 14:48:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9) internal successors, (609), 210 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 609 transitions. [2021-08-06 14:48:09,019 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 609 transitions. Word has length 22 [2021-08-06 14:48:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:09,019 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 609 transitions. [2021-08-06 14:48:09,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 609 transitions. [2021-08-06 14:48:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:09,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:09,020 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:09,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:09,236 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,SelfDestructingSolverStorable56 [2021-08-06 14:48:09,237 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:09,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1556134201, now seen corresponding path program 23 times [2021-08-06 14:48:09,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:09,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729479953] [2021-08-06 14:48:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:09,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:09,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:09,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729479953] [2021-08-06 14:48:09,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729479953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:09,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658118179] [2021-08-06 14:48:09,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:48:09,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:09,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:09,283 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) [2021-08-06 14:48:09,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 14:48:10,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:48:10,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:10,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658118179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:10,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:10,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:10,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491222455] [2021-08-06 14:48:10,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:10,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:10,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:10,600 INFO L87 Difference]: Start difference. First operand 211 states and 609 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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) [2021-08-06 14:48:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:10,715 INFO L93 Difference]: Finished difference Result 542 states and 1552 transitions. [2021-08-06 14:48:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:48:10,715 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 22 [2021-08-06 14:48:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:10,716 INFO L225 Difference]: With dead ends: 542 [2021-08-06 14:48:10,716 INFO L226 Difference]: Without dead ends: 542 [2021-08-06 14:48:10,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:48:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-08-06 14:48:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 270. [2021-08-06 14:48:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.0446096654275094) internal successors, (819), 269 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 819 transitions. [2021-08-06 14:48:10,723 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 819 transitions. Word has length 22 [2021-08-06 14:48:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:10,723 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 819 transitions. [2021-08-06 14:48:10,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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) [2021-08-06 14:48:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 819 transitions. [2021-08-06 14:48:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:10,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:10,724 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:10,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:10,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:10,949 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1860149017, now seen corresponding path program 24 times [2021-08-06 14:48:10,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:10,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298258560] [2021-08-06 14:48:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:10,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:10,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:10,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298258560] [2021-08-06 14:48:10,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298258560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:10,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136453517] [2021-08-06 14:48:10,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:48:10,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:10,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:10,994 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) [2021-08-06 14:48:10,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 14:48:12,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:48:12,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:12,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136453517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:12,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:12,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:12,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950171334] [2021-08-06 14:48:12,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:12,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:12,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:12,377 INFO L87 Difference]: Start difference. First operand 270 states and 819 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-08-06 14:48:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:12,551 INFO L93 Difference]: Finished difference Result 602 states and 1634 transitions. [2021-08-06 14:48:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:48:12,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 22 [2021-08-06 14:48:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:12,553 INFO L225 Difference]: With dead ends: 602 [2021-08-06 14:48:12,553 INFO L226 Difference]: Without dead ends: 566 [2021-08-06 14:48:12,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:48:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-06 14:48:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 382. [2021-08-06 14:48:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.020997375328084) internal successors, (1151), 381 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1151 transitions. [2021-08-06 14:48:12,561 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1151 transitions. Word has length 22 [2021-08-06 14:48:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:12,561 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1151 transitions. [2021-08-06 14:48:12,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-08-06 14:48:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1151 transitions. [2021-08-06 14:48:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:12,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:12,562 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:12,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:12,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 14:48:12,783 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:12,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:12,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1623645695, now seen corresponding path program 25 times [2021-08-06 14:48:12,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:12,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449618764] [2021-08-06 14:48:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:12,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:12,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:12,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449618764] [2021-08-06 14:48:12,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449618764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:12,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437026212] [2021-08-06 14:48:12,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:48:12,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:12,855 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) [2021-08-06 14:48:12,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 14:48:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:14,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:14,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:14,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437026212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:14,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:14,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:14,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563766117] [2021-08-06 14:48:14,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:14,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:14,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:14,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:14,201 INFO L87 Difference]: Start difference. First operand 382 states and 1151 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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) [2021-08-06 14:48:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:14,315 INFO L93 Difference]: Finished difference Result 831 states and 2360 transitions. [2021-08-06 14:48:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:48:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 22 [2021-08-06 14:48:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:14,318 INFO L225 Difference]: With dead ends: 831 [2021-08-06 14:48:14,318 INFO L226 Difference]: Without dead ends: 831 [2021-08-06 14:48:14,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:48:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-08-06 14:48:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 422. [2021-08-06 14:48:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.1282660332541568) internal successors, (1317), 421 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1317 transitions. [2021-08-06 14:48:14,327 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1317 transitions. Word has length 22 [2021-08-06 14:48:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:14,328 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1317 transitions. [2021-08-06 14:48:14,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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) [2021-08-06 14:48:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1317 transitions. [2021-08-06 14:48:14,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:14,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:14,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:14,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 14:48:14,532 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,SelfDestructingSolverStorable59 [2021-08-06 14:48:14,533 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1746864421, now seen corresponding path program 26 times [2021-08-06 14:48:14,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:14,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316754728] [2021-08-06 14:48:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:14,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:14,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:14,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316754728] [2021-08-06 14:48:14,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316754728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:14,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962697847] [2021-08-06 14:48:14,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:48:14,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:14,593 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) [2021-08-06 14:48:14,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 14:48:15,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:48:15,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:15,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962697847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:15,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:15,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:15,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914458553] [2021-08-06 14:48:15,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:15,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:15,939 INFO L87 Difference]: Start difference. First operand 422 states and 1317 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-08-06 14:48:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:16,122 INFO L93 Difference]: Finished difference Result 732 states and 2108 transitions. [2021-08-06 14:48:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:48:16,122 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 22 [2021-08-06 14:48:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:16,124 INFO L225 Difference]: With dead ends: 732 [2021-08-06 14:48:16,124 INFO L226 Difference]: Without dead ends: 708 [2021-08-06 14:48:16,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:48:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-08-06 14:48:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 454. [2021-08-06 14:48:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.196467991169978) internal successors, (1448), 453 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1448 transitions. [2021-08-06 14:48:16,131 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1448 transitions. Word has length 22 [2021-08-06 14:48:16,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:16,131 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1448 transitions. [2021-08-06 14:48:16,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-08-06 14:48:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1448 transitions. [2021-08-06 14:48:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:16,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:16,132 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:16,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:16,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:16,333 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:16,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:16,334 INFO L82 PathProgramCache]: Analyzing trace with hash 676108133, now seen corresponding path program 27 times [2021-08-06 14:48:16,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:16,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166010378] [2021-08-06 14:48:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:16,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:16,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:16,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166010378] [2021-08-06 14:48:16,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166010378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:16,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564680425] [2021-08-06 14:48:16,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:48:16,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:16,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:16,376 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) [2021-08-06 14:48:16,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 14:48:17,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:48:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:17,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:17,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564680425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:17,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:17,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:17,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305075206] [2021-08-06 14:48:17,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:17,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:17,708 INFO L87 Difference]: Start difference. First operand 454 states and 1448 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:17,835 INFO L93 Difference]: Finished difference Result 701 states and 2039 transitions. [2021-08-06 14:48:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:48:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:48:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:17,837 INFO L225 Difference]: With dead ends: 701 [2021-08-06 14:48:17,837 INFO L226 Difference]: Without dead ends: 680 [2021-08-06 14:48:17,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:48:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-08-06 14:48:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 437. [2021-08-06 14:48:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.19954128440367) internal successors, (1395), 436 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1395 transitions. [2021-08-06 14:48:17,844 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1395 transitions. Word has length 22 [2021-08-06 14:48:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:17,844 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1395 transitions. [2021-08-06 14:48:17,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1395 transitions. [2021-08-06 14:48:17,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:17,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:17,845 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:17,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:18,052 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,SelfDestructingSolverStorable61 [2021-08-06 14:48:18,052 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:18,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1388287935, now seen corresponding path program 28 times [2021-08-06 14:48:18,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:18,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831120946] [2021-08-06 14:48:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:18,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:18,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:18,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831120946] [2021-08-06 14:48:18,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831120946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:18,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281352091] [2021-08-06 14:48:18,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:48:18,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:18,092 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) [2021-08-06 14:48:18,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 14:48:19,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:48:19,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:19,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:19,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281352091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:19,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:19,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:19,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023432300] [2021-08-06 14:48:19,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:19,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:19,437 INFO L87 Difference]: Start difference. First operand 437 states and 1395 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:19,604 INFO L93 Difference]: Finished difference Result 698 states and 2068 transitions. [2021-08-06 14:48:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:48:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:48:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:19,606 INFO L225 Difference]: With dead ends: 698 [2021-08-06 14:48:19,606 INFO L226 Difference]: Without dead ends: 688 [2021-08-06 14:48:19,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:48:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-08-06 14:48:19,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 443. [2021-08-06 14:48:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.171945701357466) internal successors, (1402), 442 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1402 transitions. [2021-08-06 14:48:19,613 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1402 transitions. Word has length 22 [2021-08-06 14:48:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:19,614 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1402 transitions. [2021-08-06 14:48:19,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1402 transitions. [2021-08-06 14:48:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:19,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:19,615 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:19,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 14:48:19,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:19,818 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash 494497543, now seen corresponding path program 29 times [2021-08-06 14:48:19,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:19,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336091463] [2021-08-06 14:48:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:19,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:19,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:19,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336091463] [2021-08-06 14:48:19,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336091463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:19,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861356216] [2021-08-06 14:48:19,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:48:19,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:19,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:19,862 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) [2021-08-06 14:48:19,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 14:48:21,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:48:21,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:21,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:21,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:21,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861356216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:21,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:21,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:48:21,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231055987] [2021-08-06 14:48:21,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:48:21,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:48:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:48:21,248 INFO L87 Difference]: Start difference. First operand 443 states and 1402 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-08-06 14:48:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:21,413 INFO L93 Difference]: Finished difference Result 1052 states and 3125 transitions. [2021-08-06 14:48:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:48:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 22 [2021-08-06 14:48:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:21,415 INFO L225 Difference]: With dead ends: 1052 [2021-08-06 14:48:21,415 INFO L226 Difference]: Without dead ends: 1052 [2021-08-06 14:48:21,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:48:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-08-06 14:48:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 483. [2021-08-06 14:48:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.2344398340248963) internal successors, (1559), 482 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1559 transitions. [2021-08-06 14:48:21,425 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1559 transitions. Word has length 22 [2021-08-06 14:48:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:21,426 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1559 transitions. [2021-08-06 14:48:21,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-08-06 14:48:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1559 transitions. [2021-08-06 14:48:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:21,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:21,427 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:21,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:21,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-06 14:48:21,632 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:21,632 INFO L82 PathProgramCache]: Analyzing trace with hash 660903613, now seen corresponding path program 30 times [2021-08-06 14:48:21,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:21,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851512966] [2021-08-06 14:48:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:21,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:21,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:21,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851512966] [2021-08-06 14:48:21,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851512966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:21,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898077329] [2021-08-06 14:48:21,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:48:21,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:21,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:21,685 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) [2021-08-06 14:48:21,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 14:48:22,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:48:22,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:22,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:22,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:23,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898077329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:23,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:23,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:48:23,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248735281] [2021-08-06 14:48:23,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:23,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:23,113 INFO L87 Difference]: Start difference. First operand 483 states and 1559 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-08-06 14:48:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:23,241 INFO L93 Difference]: Finished difference Result 1202 states and 3614 transitions. [2021-08-06 14:48:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:48:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 22 [2021-08-06 14:48:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:23,244 INFO L225 Difference]: With dead ends: 1202 [2021-08-06 14:48:23,244 INFO L226 Difference]: Without dead ends: 1202 [2021-08-06 14:48:23,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:48:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-08-06 14:48:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 599. [2021-08-06 14:48:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.3729096989966556) internal successors, (2017), 598 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2017 transitions. [2021-08-06 14:48:23,259 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2017 transitions. Word has length 22 [2021-08-06 14:48:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:23,273 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 2017 transitions. [2021-08-06 14:48:23,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-08-06 14:48:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2017 transitions. [2021-08-06 14:48:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:23,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:23,275 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:23,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:23,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:23,489 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:23,489 INFO L82 PathProgramCache]: Analyzing trace with hash 896261373, now seen corresponding path program 31 times [2021-08-06 14:48:23,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:23,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251389382] [2021-08-06 14:48:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:23,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:48:23,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:23,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251389382] [2021-08-06 14:48:23,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251389382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:23,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533727633] [2021-08-06 14:48:23,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:48:23,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:23,529 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) [2021-08-06 14:48:23,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 14:48:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:24,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:25,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533727633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:25,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:25,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:48:25,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047758393] [2021-08-06 14:48:25,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:25,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:25,025 INFO L87 Difference]: Start difference. First operand 599 states and 2017 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2021-08-06 14:48:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:25,209 INFO L93 Difference]: Finished difference Result 1062 states and 3216 transitions. [2021-08-06 14:48:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:48:25,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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 22 [2021-08-06 14:48:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:25,211 INFO L225 Difference]: With dead ends: 1062 [2021-08-06 14:48:25,211 INFO L226 Difference]: Without dead ends: 1057 [2021-08-06 14:48:25,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:48:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-08-06 14:48:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 599. [2021-08-06 14:48:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.3645484949832776) internal successors, (2012), 598 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2012 transitions. [2021-08-06 14:48:25,221 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2012 transitions. Word has length 22 [2021-08-06 14:48:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:25,221 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 2012 transitions. [2021-08-06 14:48:25,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2021-08-06 14:48:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2012 transitions. [2021-08-06 14:48:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:25,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:25,223 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:25,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 14:48:25,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:25,431 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:25,432 INFO L82 PathProgramCache]: Analyzing trace with hash 412104765, now seen corresponding path program 32 times [2021-08-06 14:48:25,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:25,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834533541] [2021-08-06 14:48:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:25,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:25,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:25,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834533541] [2021-08-06 14:48:25,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834533541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:25,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129786401] [2021-08-06 14:48:25,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:48:25,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:25,495 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) [2021-08-06 14:48:25,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 14:48:26,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:48:26,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:26,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:26,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:26,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129786401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:26,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:26,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:48:26,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209177841] [2021-08-06 14:48:26,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:48:26,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:26,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:48:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:48:26,899 INFO L87 Difference]: Start difference. First operand 599 states and 2012 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2021-08-06 14:48:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:27,083 INFO L93 Difference]: Finished difference Result 1076 states and 3373 transitions. [2021-08-06 14:48:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:48:27,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 22 [2021-08-06 14:48:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:27,085 INFO L225 Difference]: With dead ends: 1076 [2021-08-06 14:48:27,085 INFO L226 Difference]: Without dead ends: 1068 [2021-08-06 14:48:27,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:48:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-08-06 14:48:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 680. [2021-08-06 14:48:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.4241531664212075) internal successors, (2325), 679 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2325 transitions. [2021-08-06 14:48:27,096 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2325 transitions. Word has length 22 [2021-08-06 14:48:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:27,096 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2325 transitions. [2021-08-06 14:48:27,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2021-08-06 14:48:27,096 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2325 transitions. [2021-08-06 14:48:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:27,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:27,097 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:27,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:27,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:27,298 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:27,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1289050551, now seen corresponding path program 33 times [2021-08-06 14:48:27,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:27,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305604024] [2021-08-06 14:48:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:27,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:27,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:27,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305604024] [2021-08-06 14:48:27,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305604024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:27,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731745813] [2021-08-06 14:48:27,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:48:27,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:27,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:27,340 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) [2021-08-06 14:48:27,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 14:48:28,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:48:28,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:28,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:28,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:28,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731745813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:28,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:28,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:48:28,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657594222] [2021-08-06 14:48:28,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:48:28,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:48:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:48:28,790 INFO L87 Difference]: Start difference. First operand 680 states and 2325 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-08-06 14:48:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:28,927 INFO L93 Difference]: Finished difference Result 1070 states and 3382 transitions. [2021-08-06 14:48:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:48:28,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 22 [2021-08-06 14:48:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:28,930 INFO L225 Difference]: With dead ends: 1070 [2021-08-06 14:48:28,930 INFO L226 Difference]: Without dead ends: 1070 [2021-08-06 14:48:28,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-08-06 14:48:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 732. [2021-08-06 14:48:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.4705882352941178) internal successors, (2537), 731 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2537 transitions. [2021-08-06 14:48:28,949 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2537 transitions. Word has length 22 [2021-08-06 14:48:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:28,949 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2537 transitions. [2021-08-06 14:48:28,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-08-06 14:48:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2537 transitions. [2021-08-06 14:48:28,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:28,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:28,950 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:28,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:29,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:29,172 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash 824275693, now seen corresponding path program 34 times [2021-08-06 14:48:29,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:29,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282703522] [2021-08-06 14:48:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:29,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:29,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:29,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282703522] [2021-08-06 14:48:29,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282703522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:29,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790555895] [2021-08-06 14:48:29,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:48:29,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:29,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:29,214 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) [2021-08-06 14:48:29,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 14:48:30,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:48:30,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:30,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:30,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:30,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790555895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:30,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:30,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:48:30,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202587094] [2021-08-06 14:48:30,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:48:30,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:48:30,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:48:30,689 INFO L87 Difference]: Start difference. First operand 732 states and 2537 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-08-06 14:48:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:30,896 INFO L93 Difference]: Finished difference Result 1151 states and 3595 transitions. [2021-08-06 14:48:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:48:30,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 22 [2021-08-06 14:48:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:30,898 INFO L225 Difference]: With dead ends: 1151 [2021-08-06 14:48:30,899 INFO L226 Difference]: Without dead ends: 1091 [2021-08-06 14:48:30,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:48:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-08-06 14:48:30,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 828. [2021-08-06 14:48:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.448609431680774) internal successors, (2852), 827 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2852 transitions. [2021-08-06 14:48:30,913 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2852 transitions. Word has length 22 [2021-08-06 14:48:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:30,913 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 2852 transitions. [2021-08-06 14:48:30,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-08-06 14:48:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2852 transitions. [2021-08-06 14:48:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:30,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:30,915 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:30,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:31,140 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,SelfDestructingSolverStorable68 [2021-08-06 14:48:31,141 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:31,141 INFO L82 PathProgramCache]: Analyzing trace with hash 673068563, now seen corresponding path program 35 times [2021-08-06 14:48:31,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:31,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198112866] [2021-08-06 14:48:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:31,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:31,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:31,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198112866] [2021-08-06 14:48:31,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198112866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:31,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440760780] [2021-08-06 14:48:31,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:48:31,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:31,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:31,187 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) [2021-08-06 14:48:31,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 14:48:32,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:48:32,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:32,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:32,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:32,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440760780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:32,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:32,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:48:32,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924362991] [2021-08-06 14:48:32,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:32,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:32,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:32,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:32,655 INFO L87 Difference]: Start difference. First operand 828 states and 2852 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 14:48:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:32,783 INFO L93 Difference]: Finished difference Result 1341 states and 4219 transitions. [2021-08-06 14:48:32,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:48:32,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 22 [2021-08-06 14:48:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:32,787 INFO L225 Difference]: With dead ends: 1341 [2021-08-06 14:48:32,788 INFO L226 Difference]: Without dead ends: 1299 [2021-08-06 14:48:32,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:48:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-08-06 14:48:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 980. [2021-08-06 14:48:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 3.438202247191011) internal successors, (3366), 979 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 3366 transitions. [2021-08-06 14:48:32,812 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 3366 transitions. Word has length 22 [2021-08-06 14:48:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:32,812 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 3366 transitions. [2021-08-06 14:48:32,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 14:48:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 3366 transitions. [2021-08-06 14:48:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:32,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:32,815 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:32,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 14:48:33,028 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,SelfDestructingSolverStorable69 [2021-08-06 14:48:33,028 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1391327505, now seen corresponding path program 36 times [2021-08-06 14:48:33,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:33,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980820815] [2021-08-06 14:48:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:33,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:33,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:33,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980820815] [2021-08-06 14:48:33,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980820815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:33,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298453467] [2021-08-06 14:48:33,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:48:33,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:33,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:33,097 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) [2021-08-06 14:48:33,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 14:48:34,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:48:34,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:34,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:34,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298453467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:34,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:34,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:48:34,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609492069] [2021-08-06 14:48:34,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:34,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:34,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:34,595 INFO L87 Difference]: Start difference. First operand 980 states and 3366 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 14:48:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:34,776 INFO L93 Difference]: Finished difference Result 1338 states and 4296 transitions. [2021-08-06 14:48:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:48:34,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 22 [2021-08-06 14:48:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:34,780 INFO L225 Difference]: With dead ends: 1338 [2021-08-06 14:48:34,781 INFO L226 Difference]: Without dead ends: 1333 [2021-08-06 14:48:34,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:48:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-08-06 14:48:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 932. [2021-08-06 14:48:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.406015037593985) internal successors, (3171), 931 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 3171 transitions. [2021-08-06 14:48:34,802 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 3171 transitions. Word has length 22 [2021-08-06 14:48:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:34,802 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 3171 transitions. [2021-08-06 14:48:34,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 14:48:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 3171 transitions. [2021-08-06 14:48:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:34,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:34,804 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:34,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:35,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:35,021 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:35,021 INFO L82 PathProgramCache]: Analyzing trace with hash -595680081, now seen corresponding path program 37 times [2021-08-06 14:48:35,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:35,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428722070] [2021-08-06 14:48:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:35,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:35,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:35,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428722070] [2021-08-06 14:48:35,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428722070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:35,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249478742] [2021-08-06 14:48:35,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:48:35,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:35,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:35,060 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) [2021-08-06 14:48:35,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 14:48:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:36,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:36,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:36,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249478742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:36,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:36,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:48:36,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145541184] [2021-08-06 14:48:36,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:36,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:36,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:36,563 INFO L87 Difference]: Start difference. First operand 932 states and 3171 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-08-06 14:48:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:36,683 INFO L93 Difference]: Finished difference Result 1643 states and 5223 transitions. [2021-08-06 14:48:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:48:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 22 [2021-08-06 14:48:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:36,686 INFO L225 Difference]: With dead ends: 1643 [2021-08-06 14:48:36,686 INFO L226 Difference]: Without dead ends: 1643 [2021-08-06 14:48:36,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:48:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-08-06 14:48:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1070. [2021-08-06 14:48:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.4752104770813843) internal successors, (3715), 1069 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3715 transitions. [2021-08-06 14:48:36,707 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3715 transitions. Word has length 22 [2021-08-06 14:48:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:36,707 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 3715 transitions. [2021-08-06 14:48:36,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-08-06 14:48:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3715 transitions. [2021-08-06 14:48:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:36,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:36,709 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:36,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 14:48:36,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:36,909 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:36,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1520137261, now seen corresponding path program 38 times [2021-08-06 14:48:36,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:36,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26523522] [2021-08-06 14:48:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:36,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:36,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:36,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26523522] [2021-08-06 14:48:36,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26523522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:36,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185620780] [2021-08-06 14:48:36,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:48:36,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:36,960 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) [2021-08-06 14:48:36,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 14:48:38,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:48:38,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:38,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:38,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:38,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185620780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:38,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:38,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:48:38,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582255276] [2021-08-06 14:48:38,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:38,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:38,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:38,508 INFO L87 Difference]: Start difference. First operand 1070 states and 3715 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-08-06 14:48:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:38,680 INFO L93 Difference]: Finished difference Result 1318 states and 4372 transitions. [2021-08-06 14:48:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:48:38,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 22 [2021-08-06 14:48:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:38,683 INFO L225 Difference]: With dead ends: 1318 [2021-08-06 14:48:38,683 INFO L226 Difference]: Without dead ends: 1294 [2021-08-06 14:48:38,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:48:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-08-06 14:48:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1112. [2021-08-06 14:48:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.532853285328533) internal successors, (3925), 1111 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3925 transitions. [2021-08-06 14:48:38,715 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3925 transitions. Word has length 22 [2021-08-06 14:48:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:38,715 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3925 transitions. [2021-08-06 14:48:38,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-08-06 14:48:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3925 transitions. [2021-08-06 14:48:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:38,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:38,717 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:38,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:38,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:38,917 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:38,918 INFO L82 PathProgramCache]: Analyzing trace with hash -360322321, now seen corresponding path program 39 times [2021-08-06 14:48:38,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:38,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318151229] [2021-08-06 14:48:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:38,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:48:38,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:38,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318151229] [2021-08-06 14:48:38,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318151229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:38,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811752691] [2021-08-06 14:48:38,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:48:38,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:38,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:38,973 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) [2021-08-06 14:48:38,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 14:48:40,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:48:40,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:40,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:40,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:40,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811752691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:40,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:40,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:48:40,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379418592] [2021-08-06 14:48:40,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:40,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:40,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:40,477 INFO L87 Difference]: Start difference. First operand 1112 states and 3925 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 14:48:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:40,641 INFO L93 Difference]: Finished difference Result 1655 states and 5369 transitions. [2021-08-06 14:48:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:48:40,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 22 [2021-08-06 14:48:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:40,644 INFO L225 Difference]: With dead ends: 1655 [2021-08-06 14:48:40,645 INFO L226 Difference]: Without dead ends: 1650 [2021-08-06 14:48:40,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:48:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-08-06 14:48:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1058. [2021-08-06 14:48:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.501419110690634) internal successors, (3701), 1057 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3701 transitions. [2021-08-06 14:48:40,660 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3701 transitions. Word has length 22 [2021-08-06 14:48:40,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:40,660 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3701 transitions. [2021-08-06 14:48:40,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 14:48:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3701 transitions. [2021-08-06 14:48:40,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:40,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:40,662 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:40,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:40,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:40,863 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:40,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:40,863 INFO L82 PathProgramCache]: Analyzing trace with hash -844478929, now seen corresponding path program 40 times [2021-08-06 14:48:40,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:40,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229051845] [2021-08-06 14:48:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:40,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:40,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:40,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229051845] [2021-08-06 14:48:40,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229051845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:40,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643992463] [2021-08-06 14:48:40,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:48:40,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:40,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:40,921 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) [2021-08-06 14:48:40,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 14:48:42,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:48:42,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:42,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643992463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:42,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:42,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:48:42,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048278720] [2021-08-06 14:48:42,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:48:42,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:48:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:48:42,492 INFO L87 Difference]: Start difference. First operand 1058 states and 3701 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-08-06 14:48:42,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:42,661 INFO L93 Difference]: Finished difference Result 1629 states and 5300 transitions. [2021-08-06 14:48:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:48:42,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 22 [2021-08-06 14:48:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:42,664 INFO L225 Difference]: With dead ends: 1629 [2021-08-06 14:48:42,664 INFO L226 Difference]: Without dead ends: 1621 [2021-08-06 14:48:42,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:48:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-08-06 14:48:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1058. [2021-08-06 14:48:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.498580889309366) internal successors, (3698), 1057 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3698 transitions. [2021-08-06 14:48:42,681 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3698 transitions. Word has length 22 [2021-08-06 14:48:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:42,681 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3698 transitions. [2021-08-06 14:48:42,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-08-06 14:48:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3698 transitions. [2021-08-06 14:48:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:42,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:42,683 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:42,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 14:48:42,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-06 14:48:42,884 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1228711595, now seen corresponding path program 41 times [2021-08-06 14:48:42,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:42,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598074267] [2021-08-06 14:48:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:42,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:42,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:42,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598074267] [2021-08-06 14:48:42,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598074267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:42,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202041302] [2021-08-06 14:48:42,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:48:42,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:42,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:42,924 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) [2021-08-06 14:48:42,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 14:48:44,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:48:44,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:44,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:44,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202041302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:44,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:44,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:44,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456197121] [2021-08-06 14:48:44,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:44,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:44,459 INFO L87 Difference]: Start difference. First operand 1058 states and 3698 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:44,580 INFO L93 Difference]: Finished difference Result 1982 states and 6436 transitions. [2021-08-06 14:48:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:48:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:48:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:44,584 INFO L225 Difference]: With dead ends: 1982 [2021-08-06 14:48:44,584 INFO L226 Difference]: Without dead ends: 1982 [2021-08-06 14:48:44,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:48:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2021-08-06 14:48:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1118. [2021-08-06 14:48:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.5380483437779766) internal successors, (3952), 1117 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3952 transitions. [2021-08-06 14:48:44,603 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3952 transitions. Word has length 22 [2021-08-06 14:48:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:44,603 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3952 transitions. [2021-08-06 14:48:44,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3952 transitions. [2021-08-06 14:48:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:44,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:44,605 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:44,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 14:48:44,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:44,806 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:44,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1936642699, now seen corresponding path program 42 times [2021-08-06 14:48:44,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:44,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997624894] [2021-08-06 14:48:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:44,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:44,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:44,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997624894] [2021-08-06 14:48:44,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997624894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:44,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923164261] [2021-08-06 14:48:44,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:48:44,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:44,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:44,844 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) [2021-08-06 14:48:44,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 14:48:46,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:48:46,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:46,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:46,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:46,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923164261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:46,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:46,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:46,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422469138] [2021-08-06 14:48:46,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:46,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:46,380 INFO L87 Difference]: Start difference. First operand 1118 states and 3952 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-08-06 14:48:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:46,581 INFO L93 Difference]: Finished difference Result 1528 states and 5019 transitions. [2021-08-06 14:48:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:48:46,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 22 [2021-08-06 14:48:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:46,595 INFO L225 Difference]: With dead ends: 1528 [2021-08-06 14:48:46,595 INFO L226 Difference]: Without dead ends: 1504 [2021-08-06 14:48:46,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:48:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2021-08-06 14:48:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1118. [2021-08-06 14:48:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.5290957923008057) internal successors, (3942), 1117 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3942 transitions. [2021-08-06 14:48:46,613 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3942 transitions. Word has length 22 [2021-08-06 14:48:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:46,613 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3942 transitions. [2021-08-06 14:48:46,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-08-06 14:48:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3942 transitions. [2021-08-06 14:48:46,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:46,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:46,615 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:46,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:46,815 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,SelfDestructingSolverStorable76 [2021-08-06 14:48:46,816 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:46,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1339423245, now seen corresponding path program 43 times [2021-08-06 14:48:46,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:46,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068365322] [2021-08-06 14:48:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:46,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:46,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:46,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068365322] [2021-08-06 14:48:46,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068365322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:46,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907376527] [2021-08-06 14:48:46,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:48:46,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:46,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:46,853 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) [2021-08-06 14:48:46,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 14:48:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:48,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907376527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:48,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:48,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:48,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148405158] [2021-08-06 14:48:48,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:48,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:48,383 INFO L87 Difference]: Start difference. First operand 1118 states and 3942 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-08-06 14:48:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:48,512 INFO L93 Difference]: Finished difference Result 1348 states and 4465 transitions. [2021-08-06 14:48:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:48:48,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 22 [2021-08-06 14:48:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:48,514 INFO L225 Difference]: With dead ends: 1348 [2021-08-06 14:48:48,515 INFO L226 Difference]: Without dead ends: 1348 [2021-08-06 14:48:48,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:48:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-08-06 14:48:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1081. [2021-08-06 14:48:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.4935185185185187) internal successors, (3773), 1080 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3773 transitions. [2021-08-06 14:48:48,544 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3773 transitions. Word has length 22 [2021-08-06 14:48:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:48,544 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 3773 transitions. [2021-08-06 14:48:48,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-08-06 14:48:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3773 transitions. [2021-08-06 14:48:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:48,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:48,546 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:48,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:48,746 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,SelfDestructingSolverStorable77 [2021-08-06 14:48:48,747 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:48,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:48,747 INFO L82 PathProgramCache]: Analyzing trace with hash -724972823, now seen corresponding path program 44 times [2021-08-06 14:48:48,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:48,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314952383] [2021-08-06 14:48:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:48,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:48,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:48,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314952383] [2021-08-06 14:48:48,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314952383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:48,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985890956] [2021-08-06 14:48:48,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:48:48,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:48,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:48,813 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) [2021-08-06 14:48:48,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 14:48:50,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:48:50,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:50,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:50,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:50,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985890956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:50,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:50,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:50,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226029247] [2021-08-06 14:48:50,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:50,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:50,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:50,445 INFO L87 Difference]: Start difference. First operand 1081 states and 3773 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-08-06 14:48:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:50,624 INFO L93 Difference]: Finished difference Result 1884 states and 6113 transitions. [2021-08-06 14:48:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:48:50,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 22 [2021-08-06 14:48:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:50,627 INFO L225 Difference]: With dead ends: 1884 [2021-08-06 14:48:50,628 INFO L226 Difference]: Without dead ends: 1879 [2021-08-06 14:48:50,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:48:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-08-06 14:48:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1045. [2021-08-06 14:48:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4655172413793105) internal successors, (3618), 1044 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3618 transitions. [2021-08-06 14:48:50,646 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3618 transitions. Word has length 22 [2021-08-06 14:48:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:50,646 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3618 transitions. [2021-08-06 14:48:50,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-08-06 14:48:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3618 transitions. [2021-08-06 14:48:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:50,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:50,648 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:50,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:50,852 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,SelfDestructingSolverStorable78 [2021-08-06 14:48:50,853 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:50,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1044869595, now seen corresponding path program 45 times [2021-08-06 14:48:50,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:50,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35786527] [2021-08-06 14:48:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:50,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:50,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:50,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35786527] [2021-08-06 14:48:50,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35786527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:50,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141301620] [2021-08-06 14:48:50,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:48:50,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:50,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:50,903 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) [2021-08-06 14:48:50,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 14:48:52,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:48:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:52,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141301620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:52,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:52,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:48:52,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655988671] [2021-08-06 14:48:52,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:48:52,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:52,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:48:52,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:48:52,475 INFO L87 Difference]: Start difference. First operand 1045 states and 3618 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-08-06 14:48:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:52,623 INFO L93 Difference]: Finished difference Result 1515 states and 4939 transitions. [2021-08-06 14:48:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:48:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 22 [2021-08-06 14:48:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:52,626 INFO L225 Difference]: With dead ends: 1515 [2021-08-06 14:48:52,626 INFO L226 Difference]: Without dead ends: 1507 [2021-08-06 14:48:52,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-08-06 14:48:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1045. [2021-08-06 14:48:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4626436781609193) internal successors, (3615), 1044 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3615 transitions. [2021-08-06 14:48:52,643 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3615 transitions. Word has length 22 [2021-08-06 14:48:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:52,643 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3615 transitions. [2021-08-06 14:48:52,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-08-06 14:48:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3615 transitions. [2021-08-06 14:48:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:52,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:52,646 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:52,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 14:48:52,860 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,SelfDestructingSolverStorable79 [2021-08-06 14:48:52,861 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash 562039857, now seen corresponding path program 46 times [2021-08-06 14:48:52,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:52,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511492046] [2021-08-06 14:48:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:52,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:52,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:52,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511492046] [2021-08-06 14:48:52,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511492046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:52,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095228228] [2021-08-06 14:48:52,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:48:52,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:52,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:52,911 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) [2021-08-06 14:48:52,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 14:48:54,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:48:54,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:54,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:54,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095228228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:54,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:54,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:48:54,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184927855] [2021-08-06 14:48:54,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:48:54,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:48:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:48:54,462 INFO L87 Difference]: Start difference. First operand 1045 states and 3615 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:54,535 INFO L93 Difference]: Finished difference Result 1319 states and 4427 transitions. [2021-08-06 14:48:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:48:54,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:48:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:54,538 INFO L225 Difference]: With dead ends: 1319 [2021-08-06 14:48:54,538 INFO L226 Difference]: Without dead ends: 1319 [2021-08-06 14:48:54,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:48:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-08-06 14:48:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1053. [2021-08-06 14:48:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.467680608365019) internal successors, (3648), 1052 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3648 transitions. [2021-08-06 14:48:54,552 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3648 transitions. Word has length 22 [2021-08-06 14:48:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:54,553 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3648 transitions. [2021-08-06 14:48:54,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3648 transitions. [2021-08-06 14:48:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:48:54,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:54,555 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:54,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 14:48:54,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:54,755 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:54,755 INFO L82 PathProgramCache]: Analyzing trace with hash 280304051, now seen corresponding path program 47 times [2021-08-06 14:48:54,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:54,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793214442] [2021-08-06 14:48:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:54,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:54,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:54,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793214442] [2021-08-06 14:48:54,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793214442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:54,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401031518] [2021-08-06 14:48:54,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:48:54,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:54,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:54,792 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) [2021-08-06 14:48:54,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 14:48:56,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:48:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:56,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:48:56,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:56,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401031518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:56,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:56,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:48:56,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665839427] [2021-08-06 14:48:56,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:48:56,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:48:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:48:56,342 INFO L87 Difference]: Start difference. First operand 1053 states and 3648 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:56,408 INFO L93 Difference]: Finished difference Result 1256 states and 4266 transitions. [2021-08-06 14:48:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:48:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:48:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:56,411 INFO L225 Difference]: With dead ends: 1256 [2021-08-06 14:48:56,411 INFO L226 Difference]: Without dead ends: 1247 [2021-08-06 14:48:56,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:48:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-08-06 14:48:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1053. [2021-08-06 14:48:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.466730038022814) internal successors, (3647), 1052 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3647 transitions. [2021-08-06 14:48:56,425 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3647 transitions. Word has length 22 [2021-08-06 14:48:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:56,425 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3647 transitions. [2021-08-06 14:48:56,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:48:56,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3647 transitions. [2021-08-06 14:48:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:48:56,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:56,427 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:56,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 14:48:56,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:56,627 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:48:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1982381327, now seen corresponding path program 48 times [2021-08-06 14:48:56,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:56,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001480809] [2021-08-06 14:48:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:56,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:56,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:56,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001480809] [2021-08-06 14:48:56,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001480809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:56,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029621170] [2021-08-06 14:48:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:48:56,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:56,979 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) [2021-08-06 14:48:56,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 14:48:58,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:48:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:48:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:59,257 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:48:59,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 29 [2021-08-06 14:48:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:59,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029621170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:59,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:59,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-08-06 14:48:59,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13321327] [2021-08-06 14:48:59,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:48:59,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:48:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:48:59,349 INFO L87 Difference]: Start difference. First operand 1053 states and 3647 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:49:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:01,548 INFO L93 Difference]: Finished difference Result 1856 states and 6147 transitions. [2021-08-06 14:49:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:49:01,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:01,552 INFO L225 Difference]: With dead ends: 1856 [2021-08-06 14:49:01,552 INFO L226 Difference]: Without dead ends: 1836 [2021-08-06 14:49:01,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1661.3ms TimeCoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 14:49:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-08-06 14:49:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1111. [2021-08-06 14:49:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 3.41981981981982) internal successors, (3796), 1110 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3796 transitions. [2021-08-06 14:49:01,574 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3796 transitions. Word has length 24 [2021-08-06 14:49:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:01,574 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 3796 transitions. [2021-08-06 14:49:01,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:49:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3796 transitions. [2021-08-06 14:49:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:01,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:01,576 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:01,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:01,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:01,793 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1403595177, now seen corresponding path program 49 times [2021-08-06 14:49:01,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:01,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597909956] [2021-08-06 14:49:01,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:01,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:02,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:02,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597909956] [2021-08-06 14:49:02,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597909956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:02,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227159906] [2021-08-06 14:49:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:49:02,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:02,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:02,108 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) [2021-08-06 14:49:02,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 14:49:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:49:03,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:04,200 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:49:04,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:49:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:04,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227159906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:04,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:04,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2021-08-06 14:49:04,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991502512] [2021-08-06 14:49:04,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:49:04,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:04,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:49:04,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:49:04,273 INFO L87 Difference]: Start difference. First operand 1111 states and 3796 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:49:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:06,338 INFO L93 Difference]: Finished difference Result 2546 states and 8529 transitions. [2021-08-06 14:49:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 14:49:06,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:06,343 INFO L225 Difference]: With dead ends: 2546 [2021-08-06 14:49:06,343 INFO L226 Difference]: Without dead ends: 2536 [2021-08-06 14:49:06,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1228.1ms TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 14:49:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2021-08-06 14:49:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 1121. [2021-08-06 14:49:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 3.43125) internal successors, (3843), 1120 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3843 transitions. [2021-08-06 14:49:06,367 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3843 transitions. Word has length 24 [2021-08-06 14:49:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:06,367 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 3843 transitions. [2021-08-06 14:49:06,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:49:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3843 transitions. [2021-08-06 14:49:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:06,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:06,369 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:06,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 14:49:06,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-06 14:49:06,569 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:06,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash -295155111, now seen corresponding path program 50 times [2021-08-06 14:49:06,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:06,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867953020] [2021-08-06 14:49:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:06,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:06,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:06,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867953020] [2021-08-06 14:49:06,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867953020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:06,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451054892] [2021-08-06 14:49:06,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:49:06,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:06,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:06,855 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) [2021-08-06 14:49:06,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 14:49:08,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:49:08,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:49:08,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:09,235 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:49:09,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:49:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:09,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451054892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:09,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:09,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2021-08-06 14:49:09,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801886938] [2021-08-06 14:49:09,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:49:09,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:09,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:49:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:49:09,311 INFO L87 Difference]: Start difference. First operand 1121 states and 3843 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:49:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:11,417 INFO L93 Difference]: Finished difference Result 1637 states and 5354 transitions. [2021-08-06 14:49:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 14:49:11,417 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:11,420 INFO L225 Difference]: With dead ends: 1637 [2021-08-06 14:49:11,420 INFO L226 Difference]: Without dead ends: 1605 [2021-08-06 14:49:11,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1475.9ms TimeCoverageRelationStatistics Valid=282, Invalid=2370, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 14:49:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-06 14:49:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1154. [2021-08-06 14:49:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 3.424111014744146) internal successors, (3948), 1153 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:11,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 3948 transitions. [2021-08-06 14:49:11,444 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 3948 transitions. Word has length 24 [2021-08-06 14:49:11,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:11,444 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 3948 transitions. [2021-08-06 14:49:11,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:49:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 3948 transitions. [2021-08-06 14:49:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:11,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:11,446 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:11,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:11,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:11,665 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:11,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:11,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1459870753, now seen corresponding path program 51 times [2021-08-06 14:49:11,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:11,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357729934] [2021-08-06 14:49:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:11,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:12,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:12,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357729934] [2021-08-06 14:49:12,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357729934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:12,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035733057] [2021-08-06 14:49:12,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:49:12,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:12,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:12,034 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) [2021-08-06 14:49:12,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 14:49:13,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:49:13,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:13,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:49:13,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:13,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:49:13,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:49:13,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:13,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 56 [2021-08-06 14:49:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:14,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035733057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:14,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:14,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-08-06 14:49:14,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436213633] [2021-08-06 14:49:14,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:49:14,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:49:14,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:49:14,589 INFO L87 Difference]: Start difference. First operand 1154 states and 3948 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:49:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:16,692 INFO L93 Difference]: Finished difference Result 1484 states and 5009 transitions. [2021-08-06 14:49:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 14:49:16,693 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:16,696 INFO L225 Difference]: With dead ends: 1484 [2021-08-06 14:49:16,696 INFO L226 Difference]: Without dead ends: 1474 [2021-08-06 14:49:16,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1885.2ms TimeCoverageRelationStatistics Valid=294, Invalid=2156, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 14:49:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-08-06 14:49:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1162. [2021-08-06 14:49:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.4211886304909562) internal successors, (3972), 1161 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3972 transitions. [2021-08-06 14:49:16,712 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3972 transitions. Word has length 24 [2021-08-06 14:49:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:16,712 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 3972 transitions. [2021-08-06 14:49:16,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:49:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3972 transitions. [2021-08-06 14:49:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:16,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:16,715 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:16,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:16,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:16,915 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash 626132313, now seen corresponding path program 52 times [2021-08-06 14:49:16,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:16,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113841933] [2021-08-06 14:49:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:16,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:17,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:17,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113841933] [2021-08-06 14:49:17,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113841933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:17,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835317535] [2021-08-06 14:49:17,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:49:17,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:17,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:17,326 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) [2021-08-06 14:49:17,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 14:49:18,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:49:18,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:49:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:19,331 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:49:19,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:49:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:19,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835317535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:19,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:19,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:49:19,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365653928] [2021-08-06 14:49:19,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:49:19,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:19,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:49:19,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:49:19,476 INFO L87 Difference]: Start difference. First operand 1162 states and 3972 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:21,087 INFO L93 Difference]: Finished difference Result 1666 states and 5558 transitions. [2021-08-06 14:49:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 14:49:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:21,099 INFO L225 Difference]: With dead ends: 1666 [2021-08-06 14:49:21,100 INFO L226 Difference]: Without dead ends: 1648 [2021-08-06 14:49:21,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1215.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 14:49:21,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-08-06 14:49:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1161. [2021-08-06 14:49:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 3.4267241379310347) internal successors, (3975), 1160 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 3975 transitions. [2021-08-06 14:49:21,136 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 3975 transitions. Word has length 24 [2021-08-06 14:49:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:21,137 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 3975 transitions. [2021-08-06 14:49:21,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 3975 transitions. [2021-08-06 14:49:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:21,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:21,139 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:21,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:21,352 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,SelfDestructingSolverStorable86 [2021-08-06 14:49:21,353 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2008440091, now seen corresponding path program 53 times [2021-08-06 14:49:21,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:21,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282177768] [2021-08-06 14:49:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:21,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:21,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:21,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282177768] [2021-08-06 14:49:21,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282177768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:21,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301025609] [2021-08-06 14:49:21,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:49:21,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:21,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:21,657 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) [2021-08-06 14:49:21,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 14:49:23,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:49:23,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:49:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:23,934 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:49:23,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:49:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:24,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301025609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:24,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:24,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:49:24,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642318131] [2021-08-06 14:49:24,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:49:24,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:24,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:49:24,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:49:24,009 INFO L87 Difference]: Start difference. First operand 1161 states and 3975 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:27,363 INFO L93 Difference]: Finished difference Result 2448 states and 8001 transitions. [2021-08-06 14:49:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 14:49:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:27,368 INFO L225 Difference]: With dead ends: 2448 [2021-08-06 14:49:27,369 INFO L226 Difference]: Without dead ends: 2415 [2021-08-06 14:49:27,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 2312.5ms TimeCoverageRelationStatistics Valid=713, Invalid=5139, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 14:49:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-08-06 14:49:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1204. [2021-08-06 14:49:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 3.4405652535328346) internal successors, (4139), 1203 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 4139 transitions. [2021-08-06 14:49:27,396 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 4139 transitions. Word has length 24 [2021-08-06 14:49:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:27,396 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 4139 transitions. [2021-08-06 14:49:27,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 4139 transitions. [2021-08-06 14:49:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:27,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:27,398 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:27,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:27,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 14:49:27,599 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:27,599 INFO L82 PathProgramCache]: Analyzing trace with hash -532822513, now seen corresponding path program 54 times [2021-08-06 14:49:27,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:27,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722482717] [2021-08-06 14:49:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:27,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:27,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:27,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722482717] [2021-08-06 14:49:27,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722482717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:27,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121156395] [2021-08-06 14:49:27,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:49:27,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:27,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:27,920 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) [2021-08-06 14:49:27,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 14:49:29,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:49:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:49:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:49:30,150 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:49:30,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 46 [2021-08-06 14:49:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:30,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121156395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:30,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:30,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 14:49:30,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389565732] [2021-08-06 14:49:30,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:49:30,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:30,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:49:30,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:49:30,319 INFO L87 Difference]: Start difference. First operand 1204 states and 4139 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:49:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:32,100 INFO L93 Difference]: Finished difference Result 2255 states and 7460 transitions. [2021-08-06 14:49:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 14:49:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:32,105 INFO L225 Difference]: With dead ends: 2255 [2021-08-06 14:49:32,105 INFO L226 Difference]: Without dead ends: 2223 [2021-08-06 14:49:32,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1251.1ms TimeCoverageRelationStatistics Valid=270, Invalid=2280, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 14:49:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-08-06 14:49:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1214. [2021-08-06 14:49:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.4460016488046166) internal successors, (4180), 1213 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4180 transitions. [2021-08-06 14:49:32,125 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4180 transitions. Word has length 24 [2021-08-06 14:49:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:32,125 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 4180 transitions. [2021-08-06 14:49:32,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:49:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4180 transitions. [2021-08-06 14:49:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:32,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:32,127 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:32,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 14:49:32,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:32,328 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1971260003, now seen corresponding path program 55 times [2021-08-06 14:49:32,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:32,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233574732] [2021-08-06 14:49:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:32,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:32,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:32,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233574732] [2021-08-06 14:49:32,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233574732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:32,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381455911] [2021-08-06 14:49:32,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:49:32,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:32,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:32,667 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) [2021-08-06 14:49:32,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 14:49:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:34,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:49:34,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:34,965 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:49:34,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:49:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:35,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381455911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:35,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:35,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:49:35,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696925067] [2021-08-06 14:49:35,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:49:35,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:35,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:49:35,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:49:35,047 INFO L87 Difference]: Start difference. First operand 1214 states and 4180 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:37,618 INFO L93 Difference]: Finished difference Result 2183 states and 7140 transitions. [2021-08-06 14:49:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 14:49:37,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:37,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:37,622 INFO L225 Difference]: With dead ends: 2183 [2021-08-06 14:49:37,622 INFO L226 Difference]: Without dead ends: 2137 [2021-08-06 14:49:37,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1951.6ms TimeCoverageRelationStatistics Valid=563, Invalid=3597, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 14:49:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-08-06 14:49:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1232. [2021-08-06 14:49:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.445978878960195) internal successors, (4242), 1231 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 4242 transitions. [2021-08-06 14:49:37,645 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 4242 transitions. Word has length 24 [2021-08-06 14:49:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:37,645 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 4242 transitions. [2021-08-06 14:49:37,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 4242 transitions. [2021-08-06 14:49:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:37,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:37,647 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:37,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 14:49:37,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:37,848 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1846621901, now seen corresponding path program 56 times [2021-08-06 14:49:37,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:37,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812787507] [2021-08-06 14:49:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:37,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:38,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:38,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812787507] [2021-08-06 14:49:38,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812787507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:38,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614750330] [2021-08-06 14:49:38,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:49:38,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:38,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:38,174 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) [2021-08-06 14:49:38,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 14:49:39,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:49:39,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:39,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:49:39,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:40,376 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-08-06 14:49:40,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 49 [2021-08-06 14:49:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:40,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614750330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:40,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:40,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:49:40,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693378511] [2021-08-06 14:49:40,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:49:40,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:49:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:49:40,937 INFO L87 Difference]: Start difference. First operand 1232 states and 4242 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:49:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:42,239 INFO L93 Difference]: Finished difference Result 1638 states and 5488 transitions. [2021-08-06 14:49:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:49:42,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:42,242 INFO L225 Difference]: With dead ends: 1638 [2021-08-06 14:49:42,242 INFO L226 Difference]: Without dead ends: 1618 [2021-08-06 14:49:42,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1113.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:49:42,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-08-06 14:49:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1230. [2021-08-06 14:49:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.4442636289666395) internal successors, (4233), 1229 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4233 transitions. [2021-08-06 14:49:42,258 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4233 transitions. Word has length 24 [2021-08-06 14:49:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:42,259 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 4233 transitions. [2021-08-06 14:49:42,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:49:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4233 transitions. [2021-08-06 14:49:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:42,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:42,261 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:42,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 14:49:42,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:42,462 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:42,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1636225050, now seen corresponding path program 1 times [2021-08-06 14:49:42,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:42,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121736126] [2021-08-06 14:49:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:42,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:42,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:42,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121736126] [2021-08-06 14:49:42,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121736126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:42,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872068352] [2021-08-06 14:49:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:42,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:42,773 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) [2021-08-06 14:49:42,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 14:49:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:44,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:49:44,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:45,163 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:49:45,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:49:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:45,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872068352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:45,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:45,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2021-08-06 14:49:45,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381726315] [2021-08-06 14:49:45,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:49:45,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:49:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:49:45,237 INFO L87 Difference]: Start difference. First operand 1230 states and 4233 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:49:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:47,514 INFO L93 Difference]: Finished difference Result 2540 states and 8433 transitions. [2021-08-06 14:49:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 14:49:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:49:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:47,519 INFO L225 Difference]: With dead ends: 2540 [2021-08-06 14:49:47,519 INFO L226 Difference]: Without dead ends: 2523 [2021-08-06 14:49:47,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1443.2ms TimeCoverageRelationStatistics Valid=298, Invalid=2782, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 14:49:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-08-06 14:49:47,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1253. [2021-08-06 14:49:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.43370607028754) internal successors, (4299), 1252 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4299 transitions. [2021-08-06 14:49:47,544 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4299 transitions. Word has length 24 [2021-08-06 14:49:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:47,544 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 4299 transitions. [2021-08-06 14:49:47,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:49:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4299 transitions. [2021-08-06 14:49:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:47,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:47,546 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:47,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 14:49:47,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:47,746 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:47,747 INFO L82 PathProgramCache]: Analyzing trace with hash 704223460, now seen corresponding path program 2 times [2021-08-06 14:49:47,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:47,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804246668] [2021-08-06 14:49:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:47,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:48,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:48,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804246668] [2021-08-06 14:49:48,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804246668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:48,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973004898] [2021-08-06 14:49:48,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:49:48,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:48,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:48,069 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) [2021-08-06 14:49:48,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 14:49:49,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:49:49,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:49,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:49:49,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:50,806 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:49:50,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:49:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:50,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973004898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:50,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:50,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2021-08-06 14:49:50,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840787758] [2021-08-06 14:49:50,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:49:50,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:50,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:49:50,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:49:50,889 INFO L87 Difference]: Start difference. First operand 1253 states and 4299 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:52,840 INFO L93 Difference]: Finished difference Result 1635 states and 5450 transitions. [2021-08-06 14:49:52,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 14:49:52,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:49:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:52,844 INFO L225 Difference]: With dead ends: 1635 [2021-08-06 14:49:52,844 INFO L226 Difference]: Without dead ends: 1619 [2021-08-06 14:49:52,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1333.1ms TimeCoverageRelationStatistics Valid=255, Invalid=2195, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 14:49:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-08-06 14:49:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1257. [2021-08-06 14:49:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 3.4323248407643314) internal successors, (4311), 1256 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 4311 transitions. [2021-08-06 14:49:52,865 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 4311 transitions. Word has length 24 [2021-08-06 14:49:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:52,865 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 4311 transitions. [2021-08-06 14:49:52,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 4311 transitions. [2021-08-06 14:49:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:52,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:52,868 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:52,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 14:49:53,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:53,074 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:53,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:53,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1596395592, now seen corresponding path program 3 times [2021-08-06 14:49:53,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:53,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272088981] [2021-08-06 14:49:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:53,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:53,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:53,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272088981] [2021-08-06 14:49:53,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272088981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:53,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958088196] [2021-08-06 14:49:53,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:49:53,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:53,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:53,419 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) [2021-08-06 14:49:53,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 14:49:55,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:49:55,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:55,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:49:55,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:55,992 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:49:55,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 14:49:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:56,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958088196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:56,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:56,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:49:56,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122134223] [2021-08-06 14:49:56,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:49:56,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:56,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:49:56,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:49:56,129 INFO L87 Difference]: Start difference. First operand 1257 states and 4311 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:49:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:57,556 INFO L93 Difference]: Finished difference Result 1731 states and 5831 transitions. [2021-08-06 14:49:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:49:57,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:49:57,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:57,560 INFO L225 Difference]: With dead ends: 1731 [2021-08-06 14:49:57,560 INFO L226 Difference]: Without dead ends: 1714 [2021-08-06 14:49:57,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1014.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 14:49:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-08-06 14:49:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1267. [2021-08-06 14:49:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.4320695102685623) internal successors, (4345), 1266 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:49:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4345 transitions. [2021-08-06 14:49:57,578 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4345 transitions. Word has length 24 [2021-08-06 14:49:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:57,578 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 4345 transitions. [2021-08-06 14:49:57,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:49:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4345 transitions. [2021-08-06 14:49:57,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:49:57,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:57,580 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:57,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-06 14:49:57,781 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:49:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash -528106916, now seen corresponding path program 4 times [2021-08-06 14:49:57,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:57,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072209886] [2021-08-06 14:49:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:57,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:58,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:58,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072209886] [2021-08-06 14:49:58,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072209886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:58,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097079238] [2021-08-06 14:49:58,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:49:58,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:58,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:58,125 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) [2021-08-06 14:49:58,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 14:50:00,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:50:00,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:00,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:50:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:00,449 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:50:00,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:50:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:00,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097079238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:00,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:00,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:50:00,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832488978] [2021-08-06 14:50:00,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:50:00,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:00,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:50:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:50:00,582 INFO L87 Difference]: Start difference. First operand 1267 states and 4345 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:50:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:01,771 INFO L93 Difference]: Finished difference Result 1705 states and 5745 transitions. [2021-08-06 14:50:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:50:01,771 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:50:01,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:01,775 INFO L225 Difference]: With dead ends: 1705 [2021-08-06 14:50:01,775 INFO L226 Difference]: Without dead ends: 1686 [2021-08-06 14:50:01,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 855.0ms TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:50:01,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-08-06 14:50:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1266. [2021-08-06 14:50:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.4339920948616602) internal successors, (4344), 1265 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4344 transitions. [2021-08-06 14:50:01,794 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4344 transitions. Word has length 24 [2021-08-06 14:50:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:01,794 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 4344 transitions. [2021-08-06 14:50:01,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:50:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4344 transitions. [2021-08-06 14:50:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:01,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:01,796 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:01,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 14:50:01,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:01,997 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:01,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2135028466, now seen corresponding path program 5 times [2021-08-06 14:50:01,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:01,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046485387] [2021-08-06 14:50:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:01,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:02,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:02,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046485387] [2021-08-06 14:50:02,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046485387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:02,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848110496] [2021-08-06 14:50:02,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:50:02,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:02,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:02,283 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) [2021-08-06 14:50:02,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 14:50:04,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:50:04,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:50:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:04,840 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:50:04,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:50:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:04,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848110496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:04,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:04,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2021-08-06 14:50:04,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783999667] [2021-08-06 14:50:04,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:50:04,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:04,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:50:04,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:50:04,913 INFO L87 Difference]: Start difference. First operand 1266 states and 4344 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:50:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:06,590 INFO L93 Difference]: Finished difference Result 1843 states and 6132 transitions. [2021-08-06 14:50:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 14:50:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:50:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:06,593 INFO L225 Difference]: With dead ends: 1843 [2021-08-06 14:50:06,593 INFO L226 Difference]: Without dead ends: 1834 [2021-08-06 14:50:06,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1067.0ms TimeCoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 14:50:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-08-06 14:50:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1266. [2021-08-06 14:50:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.4339920948616602) internal successors, (4344), 1265 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4344 transitions. [2021-08-06 14:50:06,612 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4344 transitions. Word has length 24 [2021-08-06 14:50:06,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:06,612 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 4344 transitions. [2021-08-06 14:50:06,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:50:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4344 transitions. [2021-08-06 14:50:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:06,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:06,614 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:06,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 14:50:06,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:06,815 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:06,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:06,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1617681574, now seen corresponding path program 6 times [2021-08-06 14:50:06,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:06,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260237250] [2021-08-06 14:50:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:06,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:07,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:07,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260237250] [2021-08-06 14:50:07,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260237250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:07,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533298229] [2021-08-06 14:50:07,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:50:07,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:07,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:07,141 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) [2021-08-06 14:50:07,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 14:50:09,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:50:09,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:09,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:50:09,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:09,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:50:09,906 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:50:09,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-08-06 14:50:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:10,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533298229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:10,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:10,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-08-06 14:50:10,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219033556] [2021-08-06 14:50:10,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:50:10,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:10,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:50:10,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:50:10,141 INFO L87 Difference]: Start difference. First operand 1266 states and 4344 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:12,133 INFO L93 Difference]: Finished difference Result 1854 states and 6113 transitions. [2021-08-06 14:50:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 14:50:12,133 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:50:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:12,137 INFO L225 Difference]: With dead ends: 1854 [2021-08-06 14:50:12,137 INFO L226 Difference]: Without dead ends: 1827 [2021-08-06 14:50:12,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1577.6ms TimeCoverageRelationStatistics Valid=330, Invalid=2022, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 14:50:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-08-06 14:50:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1273. [2021-08-06 14:50:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 3.4378930817610063) internal successors, (4373), 1272 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 4373 transitions. [2021-08-06 14:50:12,165 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 4373 transitions. Word has length 24 [2021-08-06 14:50:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:12,165 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 4373 transitions. [2021-08-06 14:50:12,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:12,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 4373 transitions. [2021-08-06 14:50:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:12,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:12,167 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:12,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 14:50:12,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:12,368 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1745915466, now seen corresponding path program 7 times [2021-08-06 14:50:12,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:12,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953673673] [2021-08-06 14:50:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:12,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:12,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:12,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953673673] [2021-08-06 14:50:12,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953673673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:12,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595632557] [2021-08-06 14:50:12,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:50:12,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:12,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:12,699 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) [2021-08-06 14:50:12,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 14:50:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:50:14,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:15,316 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:50:15,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:50:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:15,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595632557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:15,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:15,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:50:15,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861496091] [2021-08-06 14:50:15,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:50:15,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:15,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:50:15,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:50:15,383 INFO L87 Difference]: Start difference. First operand 1273 states and 4373 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:50:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:17,990 INFO L93 Difference]: Finished difference Result 2096 states and 6913 transitions. [2021-08-06 14:50:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 14:50:17,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:50:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:17,994 INFO L225 Difference]: With dead ends: 2096 [2021-08-06 14:50:17,994 INFO L226 Difference]: Without dead ends: 2057 [2021-08-06 14:50:17,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1905.6ms TimeCoverageRelationStatistics Valid=556, Invalid=3476, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 14:50:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-08-06 14:50:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1282. [2021-08-06 14:50:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.441061670569867) internal successors, (4408), 1281 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4408 transitions. [2021-08-06 14:50:18,024 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4408 transitions. Word has length 24 [2021-08-06 14:50:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:18,024 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 4408 transitions. [2021-08-06 14:50:18,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:50:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4408 transitions. [2021-08-06 14:50:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:18,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:18,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:18,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 14:50:18,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:18,236 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1528694233, now seen corresponding path program 57 times [2021-08-06 14:50:18,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:18,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832531843] [2021-08-06 14:50:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:18,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:18,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:18,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832531843] [2021-08-06 14:50:18,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832531843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:18,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445608144] [2021-08-06 14:50:18,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:50:18,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:18,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:18,530 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) [2021-08-06 14:50:18,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 14:50:20,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:50:20,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:20,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:50:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:21,558 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:50:21,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:50:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:21,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445608144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:21,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:21,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:50:21,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845884621] [2021-08-06 14:50:21,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:50:21,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:21,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:50:21,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:50:21,627 INFO L87 Difference]: Start difference. First operand 1282 states and 4408 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:50:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:23,081 INFO L93 Difference]: Finished difference Result 1852 states and 6121 transitions. [2021-08-06 14:50:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:50:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:50:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:23,085 INFO L225 Difference]: With dead ends: 1852 [2021-08-06 14:50:23,085 INFO L226 Difference]: Without dead ends: 1830 [2021-08-06 14:50:23,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 935.3ms TimeCoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:50:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-08-06 14:50:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1297. [2021-08-06 14:50:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.4483024691358026) internal successors, (4469), 1296 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4469 transitions. [2021-08-06 14:50:23,104 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4469 transitions. Word has length 24 [2021-08-06 14:50:23,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:23,104 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 4469 transitions. [2021-08-06 14:50:23,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:50:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4469 transitions. [2021-08-06 14:50:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:23,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:23,106 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:23,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 14:50:23,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:23,307 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash 180325949, now seen corresponding path program 58 times [2021-08-06 14:50:23,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:23,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798754284] [2021-08-06 14:50:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:23,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:23,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:23,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798754284] [2021-08-06 14:50:23,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798754284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:23,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476224734] [2021-08-06 14:50:23,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:50:23,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:23,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:23,673 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) [2021-08-06 14:50:23,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 14:50:25,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:50:25,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:50:25,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:26,268 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:50:26,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:50:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:26,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476224734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:26,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:26,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:50:26,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797477808] [2021-08-06 14:50:26,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:50:26,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:26,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:50:26,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:50:26,414 INFO L87 Difference]: Start difference. First operand 1297 states and 4469 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:50:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:27,541 INFO L93 Difference]: Finished difference Result 1536 states and 5202 transitions. [2021-08-06 14:50:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:50:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:50:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:27,544 INFO L225 Difference]: With dead ends: 1536 [2021-08-06 14:50:27,544 INFO L226 Difference]: Without dead ends: 1526 [2021-08-06 14:50:27,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 829.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:50:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-08-06 14:50:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1302. [2021-08-06 14:50:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.445042275172944) internal successors, (4482), 1301 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4482 transitions. [2021-08-06 14:50:27,564 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4482 transitions. Word has length 24 [2021-08-06 14:50:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:27,564 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 4482 transitions. [2021-08-06 14:50:27,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:50:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4482 transitions. [2021-08-06 14:50:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:27,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:27,566 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:27,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 14:50:27,767 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,SelfDestructingSolverStorable99 [2021-08-06 14:50:27,767 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash -653412491, now seen corresponding path program 59 times [2021-08-06 14:50:27,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:27,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455371170] [2021-08-06 14:50:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:27,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:28,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:28,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455371170] [2021-08-06 14:50:28,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455371170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:28,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098615893] [2021-08-06 14:50:28,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:50:28,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:28,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:28,122 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) [2021-08-06 14:50:28,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 14:50:30,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:50:30,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:30,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:50:30,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:30,706 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:50:30,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 25 [2021-08-06 14:50:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:30,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098615893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:30,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:30,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-06 14:50:30,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236585123] [2021-08-06 14:50:30,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 14:50:30,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 14:50:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:50:30,838 INFO L87 Difference]: Start difference. First operand 1302 states and 4482 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2021-08-06 14:50:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:32,014 INFO L93 Difference]: Finished difference Result 1471 states and 4949 transitions. [2021-08-06 14:50:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:50:32,015 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:50:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:32,017 INFO L225 Difference]: With dead ends: 1471 [2021-08-06 14:50:32,017 INFO L226 Difference]: Without dead ends: 1463 [2021-08-06 14:50:32,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 936.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:50:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-08-06 14:50:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1301. [2021-08-06 14:50:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.4461538461538463) internal successors, (4480), 1300 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4480 transitions. [2021-08-06 14:50:32,034 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4480 transitions. Word has length 24 [2021-08-06 14:50:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:32,034 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 4480 transitions. [2021-08-06 14:50:32,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2021-08-06 14:50:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4480 transitions. [2021-08-06 14:50:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:32,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:32,036 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:32,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 14:50:32,236 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,SelfDestructingSolverStorable100 [2021-08-06 14:50:32,237 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash -53076655, now seen corresponding path program 60 times [2021-08-06 14:50:32,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:32,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899149357] [2021-08-06 14:50:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:32,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:32,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:32,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899149357] [2021-08-06 14:50:32,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899149357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:32,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947408724] [2021-08-06 14:50:32,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:50:32,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:32,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:32,535 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) [2021-08-06 14:50:32,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 14:50:34,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:50:34,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:50:34,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:50:35,317 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:50:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 46 [2021-08-06 14:50:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:35,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947408724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:35,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:35,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 14:50:35,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530385150] [2021-08-06 14:50:35,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:50:35,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:50:35,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:50:35,442 INFO L87 Difference]: Start difference. First operand 1301 states and 4480 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:50:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:36,779 INFO L93 Difference]: Finished difference Result 2117 states and 6974 transitions. [2021-08-06 14:50:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:50:36,779 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:50:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:36,783 INFO L225 Difference]: With dead ends: 2117 [2021-08-06 14:50:36,783 INFO L226 Difference]: Without dead ends: 2085 [2021-08-06 14:50:36,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 908.7ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 14:50:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-08-06 14:50:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1307. [2021-08-06 14:50:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.4479326186830015) internal successors, (4503), 1306 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4503 transitions. [2021-08-06 14:50:36,804 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4503 transitions. Word has length 24 [2021-08-06 14:50:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:36,804 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 4503 transitions. [2021-08-06 14:50:36,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:50:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4503 transitions. [2021-08-06 14:50:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:36,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:36,806 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:36,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 14:50:37,006 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,SelfDestructingSolverStorable101 [2021-08-06 14:50:37,007 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:37,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:37,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1190905347, now seen corresponding path program 61 times [2021-08-06 14:50:37,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:37,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610727746] [2021-08-06 14:50:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:37,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:37,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:37,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610727746] [2021-08-06 14:50:37,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610727746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:37,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927950306] [2021-08-06 14:50:37,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:50:37,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:37,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:37,421 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) [2021-08-06 14:50:37,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 14:50:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:39,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:50:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:40,140 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:50:40,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:50:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:40,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927950306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:40,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:40,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:50:40,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456007259] [2021-08-06 14:50:40,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:50:40,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:40,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:50:40,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:50:40,285 INFO L87 Difference]: Start difference. First operand 1307 states and 4503 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:50:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:41,372 INFO L93 Difference]: Finished difference Result 1522 states and 5146 transitions. [2021-08-06 14:50:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:50:41,372 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:50:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:41,375 INFO L225 Difference]: With dead ends: 1522 [2021-08-06 14:50:41,375 INFO L226 Difference]: Without dead ends: 1511 [2021-08-06 14:50:41,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:50:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-08-06 14:50:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1306. [2021-08-06 14:50:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.452873563218391) internal successors, (4506), 1305 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4506 transitions. [2021-08-06 14:50:41,394 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4506 transitions. Word has length 24 [2021-08-06 14:50:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:41,394 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 4506 transitions. [2021-08-06 14:50:41,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:50:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4506 transitions. [2021-08-06 14:50:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:41,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:41,396 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:41,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 14:50:41,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 14:50:41,596 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:41,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:41,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1843961435, now seen corresponding path program 62 times [2021-08-06 14:50:41,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:41,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842767891] [2021-08-06 14:50:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:41,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:41,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:41,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842767891] [2021-08-06 14:50:41,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842767891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:41,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253362315] [2021-08-06 14:50:41,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:50:41,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:41,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:41,921 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) [2021-08-06 14:50:41,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 14:50:44,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:50:44,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:44,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:50:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:44,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:50:44,906 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:50:44,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 54 [2021-08-06 14:50:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:45,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253362315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:45,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:45,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:50:45,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643602878] [2021-08-06 14:50:45,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:50:45,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:50:45,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:50:45,102 INFO L87 Difference]: Start difference. First operand 1306 states and 4506 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:50:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:46,869 INFO L93 Difference]: Finished difference Result 1861 states and 6129 transitions. [2021-08-06 14:50:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 14:50:46,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:50:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:46,873 INFO L225 Difference]: With dead ends: 1861 [2021-08-06 14:50:46,873 INFO L226 Difference]: Without dead ends: 1839 [2021-08-06 14:50:46,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1400.8ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 14:50:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-08-06 14:50:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1315. [2021-08-06 14:50:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1314 states have (on average 3.454337899543379) internal successors, (4539), 1314 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 4539 transitions. [2021-08-06 14:50:46,892 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 4539 transitions. Word has length 24 [2021-08-06 14:50:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:46,892 INFO L470 AbstractCegarLoop]: Abstraction has 1315 states and 4539 transitions. [2021-08-06 14:50:46,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:50:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 4539 transitions. [2021-08-06 14:50:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:46,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:46,894 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:46,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 14:50:47,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:47,094 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:47,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1592659282, now seen corresponding path program 8 times [2021-08-06 14:50:47,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:47,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841165500] [2021-08-06 14:50:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:47,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:47,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:47,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841165500] [2021-08-06 14:50:47,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841165500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:47,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396853336] [2021-08-06 14:50:47,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:50:47,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:47,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:47,425 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) [2021-08-06 14:50:47,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 14:50:49,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:50:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:50:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:50,660 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:50:50,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:50:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:50,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396853336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:50,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:50,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2021-08-06 14:50:50,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136208683] [2021-08-06 14:50:50,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:50:50,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:50,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:50:50,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:50:50,733 INFO L87 Difference]: Start difference. First operand 1315 states and 4539 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:51,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:51,826 INFO L93 Difference]: Finished difference Result 1552 states and 5183 transitions. [2021-08-06 14:50:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:50:51,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:50:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:51,830 INFO L225 Difference]: With dead ends: 1552 [2021-08-06 14:50:51,830 INFO L226 Difference]: Without dead ends: 1536 [2021-08-06 14:50:51,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 892.2ms TimeCoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:50:51,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-08-06 14:50:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1318. [2021-08-06 14:50:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.454062262718299) internal successors, (4549), 1317 states have internal predecessors, (4549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4549 transitions. [2021-08-06 14:50:51,848 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4549 transitions. Word has length 24 [2021-08-06 14:50:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:51,848 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 4549 transitions. [2021-08-06 14:50:51,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4549 transitions. [2021-08-06 14:50:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:51,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:51,850 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:51,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 14:50:52,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:52,051 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:52,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1050402026, now seen corresponding path program 9 times [2021-08-06 14:50:52,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:52,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208380556] [2021-08-06 14:50:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:52,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:52,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:52,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208380556] [2021-08-06 14:50:52,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208380556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:52,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592904650] [2021-08-06 14:50:52,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:50:52,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:52,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:52,393 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) [2021-08-06 14:50:52,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 14:50:54,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:50:54,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:54,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:50:54,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:55,685 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:50:55,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:50:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:55,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592904650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:55,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:55,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:50:55,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077254649] [2021-08-06 14:50:55,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:50:55,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:50:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:50:55,754 INFO L87 Difference]: Start difference. First operand 1318 states and 4549 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:50:57,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:57,322 INFO L93 Difference]: Finished difference Result 1750 states and 5846 transitions. [2021-08-06 14:50:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:50:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:50:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:57,325 INFO L225 Difference]: With dead ends: 1750 [2021-08-06 14:50:57,325 INFO L226 Difference]: Without dead ends: 1731 [2021-08-06 14:50:57,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1121.0ms TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:50:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-08-06 14:50:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1324. [2021-08-06 14:50:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.45578231292517) internal successors, (4572), 1323 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:50:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4572 transitions. [2021-08-06 14:50:57,351 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4572 transitions. Word has length 24 [2021-08-06 14:50:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:57,351 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 4572 transitions. [2021-08-06 14:50:57,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:50:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4572 transitions. [2021-08-06 14:50:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:50:57,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:57,354 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:57,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 14:50:57,568 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,SelfDestructingSolverStorable105 [2021-08-06 14:50:57,569 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:50:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1178635918, now seen corresponding path program 10 times [2021-08-06 14:50:57,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:57,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119053940] [2021-08-06 14:50:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:57,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:57,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:57,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119053940] [2021-08-06 14:50:57,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119053940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:57,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041844481] [2021-08-06 14:50:57,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:50:57,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:57,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:57,943 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) [2021-08-06 14:50:57,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 14:51:00,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:51:00,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:00,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:00,994 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:51:00,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:51:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:01,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041844481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:01,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:01,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:51:01,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275560907] [2021-08-06 14:51:01,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:51:01,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:01,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:51:01,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:51:01,060 INFO L87 Difference]: Start difference. First operand 1324 states and 4572 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:51:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:02,561 INFO L93 Difference]: Finished difference Result 1767 states and 5876 transitions. [2021-08-06 14:51:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 14:51:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:51:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:02,564 INFO L225 Difference]: With dead ends: 1767 [2021-08-06 14:51:02,565 INFO L226 Difference]: Without dead ends: 1748 [2021-08-06 14:51:02,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1264.6ms TimeCoverageRelationStatistics Valid=299, Invalid=1681, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 14:51:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-08-06 14:51:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1342. [2021-08-06 14:51:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.460850111856823) internal successors, (4641), 1341 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4641 transitions. [2021-08-06 14:51:02,583 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4641 transitions. Word has length 24 [2021-08-06 14:51:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:02,583 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 4641 transitions. [2021-08-06 14:51:02,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:51:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4641 transitions. [2021-08-06 14:51:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:02,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:02,585 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:02,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 14:51:02,786 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,SelfDestructingSolverStorable106 [2021-08-06 14:51:02,786 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash -707959770, now seen corresponding path program 11 times [2021-08-06 14:51:02,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:02,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552749838] [2021-08-06 14:51:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:02,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:03,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:03,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552749838] [2021-08-06 14:51:03,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552749838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:03,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499417621] [2021-08-06 14:51:03,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:51:03,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:03,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:03,152 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) [2021-08-06 14:51:03,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 14:51:05,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:51:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:05,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:05,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:06,072 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:51:06,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:51:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:06,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499417621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:06,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:06,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:51:06,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445480622] [2021-08-06 14:51:06,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:51:06,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:06,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:51:06,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:51:06,208 INFO L87 Difference]: Start difference. First operand 1342 states and 4641 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:51:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:07,006 INFO L93 Difference]: Finished difference Result 1539 states and 5248 transitions. [2021-08-06 14:51:07,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:51:07,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:51:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:07,009 INFO L225 Difference]: With dead ends: 1539 [2021-08-06 14:51:07,009 INFO L226 Difference]: Without dead ends: 1530 [2021-08-06 14:51:07,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 601.8ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:51:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-08-06 14:51:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1345. [2021-08-06 14:51:07,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.4605654761904763) internal successors, (4651), 1344 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4651 transitions. [2021-08-06 14:51:07,027 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4651 transitions. Word has length 24 [2021-08-06 14:51:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:07,027 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4651 transitions. [2021-08-06 14:51:07,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:51:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4651 transitions. [2021-08-06 14:51:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:07,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:07,029 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:07,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 14:51:07,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 14:51:07,230 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:07,230 INFO L82 PathProgramCache]: Analyzing trace with hash 360328906, now seen corresponding path program 12 times [2021-08-06 14:51:07,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:07,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957845838] [2021-08-06 14:51:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:07,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:07,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:07,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957845838] [2021-08-06 14:51:07,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957845838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:07,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304965891] [2021-08-06 14:51:07,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:51:07,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:07,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:07,563 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) [2021-08-06 14:51:07,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 14:51:10,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:51:10,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:10,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:10,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:10,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:51:10,594 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:51:10,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 56 [2021-08-06 14:51:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:11,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304965891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:11,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:11,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-08-06 14:51:11,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748358755] [2021-08-06 14:51:11,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:51:11,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:51:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:51:11,166 INFO L87 Difference]: Start difference. First operand 1345 states and 4651 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:12,217 INFO L93 Difference]: Finished difference Result 1497 states and 5095 transitions. [2021-08-06 14:51:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:51:12,217 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:51:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:12,220 INFO L225 Difference]: With dead ends: 1497 [2021-08-06 14:51:12,220 INFO L226 Difference]: Without dead ends: 1489 [2021-08-06 14:51:12,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 925.4ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:51:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-08-06 14:51:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1363. [2021-08-06 14:51:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.456681350954479) internal successors, (4708), 1362 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4708 transitions. [2021-08-06 14:51:12,236 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4708 transitions. Word has length 24 [2021-08-06 14:51:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:12,236 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 4708 transitions. [2021-08-06 14:51:12,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4708 transitions. [2021-08-06 14:51:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:12,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:12,238 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:12,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 14:51:12,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:12,439 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1093895428, now seen corresponding path program 13 times [2021-08-06 14:51:12,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:12,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971073775] [2021-08-06 14:51:12,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:12,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:12,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:12,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971073775] [2021-08-06 14:51:12,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971073775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:12,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750472813] [2021-08-06 14:51:12,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:51:12,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:12,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:12,814 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) [2021-08-06 14:51:12,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 14:51:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:15,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:15,832 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:51:15,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:51:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:15,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750472813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:15,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:15,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-08-06 14:51:15,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704608890] [2021-08-06 14:51:15,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:51:15,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:15,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:51:15,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:51:15,958 INFO L87 Difference]: Start difference. First operand 1363 states and 4708 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) [2021-08-06 14:51:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:16,662 INFO L93 Difference]: Finished difference Result 1534 states and 5234 transitions. [2021-08-06 14:51:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:51:16,662 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 24 [2021-08-06 14:51:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:16,665 INFO L225 Difference]: With dead ends: 1534 [2021-08-06 14:51:16,666 INFO L226 Difference]: Without dead ends: 1523 [2021-08-06 14:51:16,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:51:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-08-06 14:51:16,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1354. [2021-08-06 14:51:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.46119733924612) internal successors, (4683), 1353 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 4683 transitions. [2021-08-06 14:51:16,685 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 4683 transitions. Word has length 24 [2021-08-06 14:51:16,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:16,685 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 4683 transitions. [2021-08-06 14:51:16,686 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) [2021-08-06 14:51:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 4683 transitions. [2021-08-06 14:51:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:16,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:16,687 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:16,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 14:51:16,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:16,888 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:16,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1639778344, now seen corresponding path program 14 times [2021-08-06 14:51:16,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:16,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383474055] [2021-08-06 14:51:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:16,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:17,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:17,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383474055] [2021-08-06 14:51:17,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383474055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:17,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31073470] [2021-08-06 14:51:17,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:51:17,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:17,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:17,295 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) [2021-08-06 14:51:17,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 14:51:20,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:51:20,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:51:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:20,905 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:51:20,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:51:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:20,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31073470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:20,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:20,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2021-08-06 14:51:20,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66374718] [2021-08-06 14:51:20,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:51:20,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:20,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:51:20,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:51:20,980 INFO L87 Difference]: Start difference. First operand 1354 states and 4683 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:22,294 INFO L93 Difference]: Finished difference Result 1633 states and 5414 transitions. [2021-08-06 14:51:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:51:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:51:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:22,297 INFO L225 Difference]: With dead ends: 1633 [2021-08-06 14:51:22,298 INFO L226 Difference]: Without dead ends: 1615 [2021-08-06 14:51:22,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:51:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-08-06 14:51:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1355. [2021-08-06 14:51:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.462333825701625) internal successors, (4688), 1354 states have internal predecessors, (4688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4688 transitions. [2021-08-06 14:51:22,327 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4688 transitions. Word has length 24 [2021-08-06 14:51:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:22,327 INFO L470 AbstractCegarLoop]: Abstraction has 1355 states and 4688 transitions. [2021-08-06 14:51:22,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4688 transitions. [2021-08-06 14:51:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:22,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:22,330 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:22,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 14:51:22,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:22,553 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:22,553 INFO L82 PathProgramCache]: Analyzing trace with hash 951824486, now seen corresponding path program 15 times [2021-08-06 14:51:22,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:22,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422355780] [2021-08-06 14:51:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:22,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:22,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:22,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422355780] [2021-08-06 14:51:22,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422355780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:22,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715426509] [2021-08-06 14:51:22,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:51:22,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:22,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:22,843 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) [2021-08-06 14:51:22,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 14:51:25,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:51:25,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:25,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:26,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:51:26,186 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:51:26,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-08-06 14:51:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:26,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715426509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:26,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:26,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-08-06 14:51:26,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383374727] [2021-08-06 14:51:26,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:51:26,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:26,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:51:26,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:51:26,396 INFO L87 Difference]: Start difference. First operand 1355 states and 4688 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:28,139 INFO L93 Difference]: Finished difference Result 1784 states and 5925 transitions. [2021-08-06 14:51:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 14:51:28,139 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:51:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:28,143 INFO L225 Difference]: With dead ends: 1784 [2021-08-06 14:51:28,143 INFO L226 Difference]: Without dead ends: 1766 [2021-08-06 14:51:28,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1250.9ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 14:51:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-08-06 14:51:28,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1367. [2021-08-06 14:51:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.4619326500732064) internal successors, (4729), 1366 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4729 transitions. [2021-08-06 14:51:28,165 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4729 transitions. Word has length 24 [2021-08-06 14:51:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:28,165 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 4729 transitions. [2021-08-06 14:51:28,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4729 transitions. [2021-08-06 14:51:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:28,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:28,167 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:28,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 14:51:28,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:28,368 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:28,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1294776669, now seen corresponding path program 63 times [2021-08-06 14:51:28,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:28,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988221218] [2021-08-06 14:51:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:28,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:28,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:28,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988221218] [2021-08-06 14:51:28,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988221218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:28,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638474754] [2021-08-06 14:51:28,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:51:28,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:28,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:28,656 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) [2021-08-06 14:51:28,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 14:51:31,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:51:31,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:31,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:51:31,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:32,234 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:51:32,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:51:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:32,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638474754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:32,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:32,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:51:32,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900066324] [2021-08-06 14:51:32,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:51:32,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:32,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:51:32,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:51:32,303 INFO L87 Difference]: Start difference. First operand 1367 states and 4729 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:51:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:33,855 INFO L93 Difference]: Finished difference Result 2056 states and 6696 transitions. [2021-08-06 14:51:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 14:51:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:51:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:33,859 INFO L225 Difference]: With dead ends: 2056 [2021-08-06 14:51:33,859 INFO L226 Difference]: Without dead ends: 1996 [2021-08-06 14:51:33,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1133.8ms TimeCoverageRelationStatistics Valid=275, Invalid=1705, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 14:51:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-08-06 14:51:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1413. [2021-08-06 14:51:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.4702549575070822) internal successors, (4900), 1412 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4900 transitions. [2021-08-06 14:51:33,884 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4900 transitions. Word has length 24 [2021-08-06 14:51:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:33,884 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 4900 transitions. [2021-08-06 14:51:33,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:51:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4900 transitions. [2021-08-06 14:51:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:33,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:33,886 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:33,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 14:51:34,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 14:51:34,087 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:34,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1598866921, now seen corresponding path program 64 times [2021-08-06 14:51:34,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:34,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096757674] [2021-08-06 14:51:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:34,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:34,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:34,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096757674] [2021-08-06 14:51:34,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096757674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:34,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869860096] [2021-08-06 14:51:34,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:51:34,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:34,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:34,457 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) [2021-08-06 14:51:34,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 14:51:37,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:51:37,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:37,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:37,683 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:51:37,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:51:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:37,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869860096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:37,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:37,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:51:37,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849139509] [2021-08-06 14:51:37,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:51:37,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:51:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:51:37,833 INFO L87 Difference]: Start difference. First operand 1413 states and 4900 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:51:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:38,958 INFO L93 Difference]: Finished difference Result 1642 states and 5583 transitions. [2021-08-06 14:51:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:51:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:51:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:38,961 INFO L225 Difference]: With dead ends: 1642 [2021-08-06 14:51:38,961 INFO L226 Difference]: Without dead ends: 1600 [2021-08-06 14:51:38,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 932.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:51:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-08-06 14:51:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1425. [2021-08-06 14:51:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.4648876404494384) internal successors, (4934), 1424 states have internal predecessors, (4934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4934 transitions. [2021-08-06 14:51:38,980 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4934 transitions. Word has length 24 [2021-08-06 14:51:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:38,980 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 4934 transitions. [2021-08-06 14:51:38,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:51:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4934 transitions. [2021-08-06 14:51:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:38,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:38,982 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:39,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 14:51:39,182 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,SelfDestructingSolverStorable113 [2021-08-06 14:51:39,182 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1862361935, now seen corresponding path program 65 times [2021-08-06 14:51:39,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:39,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855201428] [2021-08-06 14:51:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:39,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:39,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:39,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855201428] [2021-08-06 14:51:39,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855201428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:39,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26564835] [2021-08-06 14:51:39,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:51:39,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:39,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:39,546 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) [2021-08-06 14:51:39,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 14:51:42,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:51:42,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:42,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:42,795 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:51:42,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 25 [2021-08-06 14:51:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:42,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26564835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:42,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:42,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-06 14:51:42,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084055223] [2021-08-06 14:51:42,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 14:51:42,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:42,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 14:51:42,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:51:42,944 INFO L87 Difference]: Start difference. First operand 1425 states and 4934 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2021-08-06 14:51:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:44,526 INFO L93 Difference]: Finished difference Result 1635 states and 5545 transitions. [2021-08-06 14:51:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:51:44,526 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:51:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:44,530 INFO L225 Difference]: With dead ends: 1635 [2021-08-06 14:51:44,530 INFO L226 Difference]: Without dead ends: 1601 [2021-08-06 14:51:44,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1247.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:51:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-08-06 14:51:44,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1425. [2021-08-06 14:51:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.4634831460674156) internal successors, (4932), 1424 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4932 transitions. [2021-08-06 14:51:44,549 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4932 transitions. Word has length 24 [2021-08-06 14:51:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:44,549 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 4932 transitions. [2021-08-06 14:51:44,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2021-08-06 14:51:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4932 transitions. [2021-08-06 14:51:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:44,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:44,551 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:44,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 14:51:44,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 14:51:44,752 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1209305847, now seen corresponding path program 66 times [2021-08-06 14:51:44,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:44,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120708991] [2021-08-06 14:51:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:44,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:45,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:45,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120708991] [2021-08-06 14:51:45,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120708991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:45,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140282481] [2021-08-06 14:51:45,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:51:45,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:45,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:45,079 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) [2021-08-06 14:51:45,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 14:51:47,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:51:47,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:47,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:47,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:48,594 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-06 14:51:48,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 55 [2021-08-06 14:51:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:48,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140282481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:48,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:48,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 14:51:48,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571525414] [2021-08-06 14:51:48,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:51:48,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:48,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:51:48,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:51:48,849 INFO L87 Difference]: Start difference. First operand 1425 states and 4932 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:51:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:51,034 INFO L93 Difference]: Finished difference Result 2464 states and 8109 transitions. [2021-08-06 14:51:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 14:51:51,034 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:51:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:51,039 INFO L225 Difference]: With dead ends: 2464 [2021-08-06 14:51:51,039 INFO L226 Difference]: Without dead ends: 2408 [2021-08-06 14:51:51,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1632.7ms TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 14:51:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-08-06 14:51:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1436. [2021-08-06 14:51:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.4689895470383276) internal successors, (4978), 1435 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4978 transitions. [2021-08-06 14:51:51,062 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4978 transitions. Word has length 24 [2021-08-06 14:51:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:51,062 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 4978 transitions. [2021-08-06 14:51:51,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:51:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4978 transitions. [2021-08-06 14:51:51,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:51,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:51,064 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:51,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 14:51:51,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:51,265 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1354827238, now seen corresponding path program 16 times [2021-08-06 14:51:51,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:51,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764607882] [2021-08-06 14:51:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:51,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:51,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:51,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764607882] [2021-08-06 14:51:51,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764607882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:51,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376372977] [2021-08-06 14:51:51,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:51:51,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:51,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:51,617 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) [2021-08-06 14:51:51,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 14:51:54,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:51:54,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:54,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:54,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:55,234 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:51:55,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:51:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:55,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376372977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:55,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:55,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:51:55,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915733278] [2021-08-06 14:51:55,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:51:55,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:55,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:51:55,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:51:55,302 INFO L87 Difference]: Start difference. First operand 1436 states and 4978 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:51:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:57,045 INFO L93 Difference]: Finished difference Result 2054 states and 6786 transitions. [2021-08-06 14:51:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 14:51:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:51:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:57,049 INFO L225 Difference]: With dead ends: 2054 [2021-08-06 14:51:57,049 INFO L226 Difference]: Without dead ends: 2018 [2021-08-06 14:51:57,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1292.6ms TimeCoverageRelationStatistics Valid=361, Invalid=1991, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 14:51:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-08-06 14:51:57,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1467. [2021-08-06 14:51:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.480218281036835) internal successors, (5102), 1466 states have internal predecessors, (5102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:51:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 5102 transitions. [2021-08-06 14:51:57,072 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 5102 transitions. Word has length 24 [2021-08-06 14:51:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:57,072 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 5102 transitions. [2021-08-06 14:51:57,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:51:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 5102 transitions. [2021-08-06 14:51:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:51:57,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:57,074 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:57,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 14:51:57,274 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,SelfDestructingSolverStorable116 [2021-08-06 14:51:57,275 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:51:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:57,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1226593346, now seen corresponding path program 17 times [2021-08-06 14:51:57,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:57,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314284964] [2021-08-06 14:51:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:57,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:57,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:57,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314284964] [2021-08-06 14:51:57,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314284964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:57,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931852865] [2021-08-06 14:51:57,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:51:57,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:57,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:57,583 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) [2021-08-06 14:51:57,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 14:52:00,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:52:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:52:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:01,154 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:52:01,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:52:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:01,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931852865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:01,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:01,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:52:01,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147448891] [2021-08-06 14:52:01,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:52:01,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:01,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:52:01,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:52:01,232 INFO L87 Difference]: Start difference. First operand 1467 states and 5102 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:02,817 INFO L93 Difference]: Finished difference Result 2111 states and 7010 transitions. [2021-08-06 14:52:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:52:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:52:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:02,822 INFO L225 Difference]: With dead ends: 2111 [2021-08-06 14:52:02,822 INFO L226 Difference]: Without dead ends: 2059 [2021-08-06 14:52:02,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1153.3ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:52:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-08-06 14:52:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1490. [2021-08-06 14:52:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.488247145735393) internal successors, (5194), 1489 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5194 transitions. [2021-08-06 14:52:02,845 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5194 transitions. Word has length 24 [2021-08-06 14:52:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:02,845 INFO L470 AbstractCegarLoop]: Abstraction has 1490 states and 5194 transitions. [2021-08-06 14:52:02,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5194 transitions. [2021-08-06 14:52:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:02,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:02,847 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:02,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 14:52:03,048 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,SelfDestructingSolverStorable117 [2021-08-06 14:52:03,048 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:03,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1181778262, now seen corresponding path program 18 times [2021-08-06 14:52:03,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:03,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798363845] [2021-08-06 14:52:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:03,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:03,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798363845] [2021-08-06 14:52:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798363845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149633363] [2021-08-06 14:52:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:52:03,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:03,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:03,397 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) [2021-08-06 14:52:03,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 14:52:06,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:52:06,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:06,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:52:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:06,886 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-08-06 14:52:06,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 48 [2021-08-06 14:52:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:07,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149633363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:07,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:07,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:52:07,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646541293] [2021-08-06 14:52:07,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:52:07,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:52:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:52:07,408 INFO L87 Difference]: Start difference. First operand 1490 states and 5194 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:52:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:08,475 INFO L93 Difference]: Finished difference Result 1705 states and 5825 transitions. [2021-08-06 14:52:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:52:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:52:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:08,479 INFO L225 Difference]: With dead ends: 1705 [2021-08-06 14:52:08,479 INFO L226 Difference]: Without dead ends: 1679 [2021-08-06 14:52:08,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 949.0ms TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:52:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-08-06 14:52:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1495. [2021-08-06 14:52:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 3.4859437751004014) internal successors, (5208), 1494 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 5208 transitions. [2021-08-06 14:52:08,498 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 5208 transitions. Word has length 24 [2021-08-06 14:52:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:08,498 INFO L470 AbstractCegarLoop]: Abstraction has 1495 states and 5208 transitions. [2021-08-06 14:52:08,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:52:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 5208 transitions. [2021-08-06 14:52:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:08,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:08,501 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:08,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 14:52:08,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:08,701 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2044900358, now seen corresponding path program 19 times [2021-08-06 14:52:08,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:08,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142865600] [2021-08-06 14:52:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:08,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:09,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:09,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142865600] [2021-08-06 14:52:09,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142865600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:09,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839857665] [2021-08-06 14:52:09,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:52:09,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:09,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:09,116 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) [2021-08-06 14:52:09,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 14:52:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:52:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:12,614 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:52:12,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:52:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:12,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839857665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:12,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:12,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:52:12,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146155879] [2021-08-06 14:52:12,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:52:12,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:52:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:52:12,751 INFO L87 Difference]: Start difference. First operand 1495 states and 5208 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:13,620 INFO L93 Difference]: Finished difference Result 1709 states and 5831 transitions. [2021-08-06 14:52:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:52:13,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:52:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:13,624 INFO L225 Difference]: With dead ends: 1709 [2021-08-06 14:52:13,624 INFO L226 Difference]: Without dead ends: 1675 [2021-08-06 14:52:13,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:52:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-08-06 14:52:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1501. [2021-08-06 14:52:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 3.482666666666667) internal successors, (5224), 1500 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 5224 transitions. [2021-08-06 14:52:13,643 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 5224 transitions. Word has length 24 [2021-08-06 14:52:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:13,643 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 5224 transitions. [2021-08-06 14:52:13,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 5224 transitions. [2021-08-06 14:52:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:13,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:13,645 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:13,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 14:52:13,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:13,846 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:13,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:13,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2147430569, now seen corresponding path program 67 times [2021-08-06 14:52:13,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:13,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101107054] [2021-08-06 14:52:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:13,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:14,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:14,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101107054] [2021-08-06 14:52:14,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101107054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:14,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394227044] [2021-08-06 14:52:14,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:52:14,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:14,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:14,176 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) [2021-08-06 14:52:14,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 14:52:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:52:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:17,827 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:52:17,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:52:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:17,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394227044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:17,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:17,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:52:17,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913934620] [2021-08-06 14:52:17,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:52:17,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:52:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:52:17,893 INFO L87 Difference]: Start difference. First operand 1501 states and 5224 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:19,491 INFO L93 Difference]: Finished difference Result 2304 states and 7558 transitions. [2021-08-06 14:52:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 14:52:19,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:52:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:19,496 INFO L225 Difference]: With dead ends: 2304 [2021-08-06 14:52:19,496 INFO L226 Difference]: Without dead ends: 2232 [2021-08-06 14:52:19,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1238.3ms TimeCoverageRelationStatistics Valid=382, Invalid=2068, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 14:52:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-08-06 14:52:19,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1546. [2021-08-06 14:52:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 3.4970873786407766) internal successors, (5403), 1545 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 5403 transitions. [2021-08-06 14:52:19,521 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 5403 transitions. Word has length 24 [2021-08-06 14:52:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:19,521 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 5403 transitions. [2021-08-06 14:52:19,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 5403 transitions. [2021-08-06 14:52:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:19,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:19,524 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:19,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 14:52:19,724 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,SelfDestructingSolverStorable120 [2021-08-06 14:52:19,724 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1933675907, now seen corresponding path program 68 times [2021-08-06 14:52:19,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:19,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492034708] [2021-08-06 14:52:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:19,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:20,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:20,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492034708] [2021-08-06 14:52:20,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492034708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:20,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984053696] [2021-08-06 14:52:20,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:52:20,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:20,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:20,079 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) [2021-08-06 14:52:20,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 14:52:23,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:52:23,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:23,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:52:23,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:23,659 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-08-06 14:52:23,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 49 [2021-08-06 14:52:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:23,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984053696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:23,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:23,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:52:23,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025361295] [2021-08-06 14:52:23,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:52:23,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:52:23,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:52:23,934 INFO L87 Difference]: Start difference. First operand 1546 states and 5403 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:52:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:25,343 INFO L93 Difference]: Finished difference Result 1800 states and 6131 transitions. [2021-08-06 14:52:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:52:25,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:52:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:25,346 INFO L225 Difference]: With dead ends: 1800 [2021-08-06 14:52:25,346 INFO L226 Difference]: Without dead ends: 1754 [2021-08-06 14:52:25,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1202.1ms TimeCoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 14:52:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-08-06 14:52:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1548. [2021-08-06 14:52:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1547 states have (on average 3.4970911441499677) internal successors, (5410), 1547 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 5410 transitions. [2021-08-06 14:52:25,367 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 5410 transitions. Word has length 24 [2021-08-06 14:52:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:25,367 INFO L470 AbstractCegarLoop]: Abstraction has 1548 states and 5410 transitions. [2021-08-06 14:52:25,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:52:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 5410 transitions. [2021-08-06 14:52:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:25,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:25,369 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:25,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 14:52:25,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:25,570 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1527552949, now seen corresponding path program 69 times [2021-08-06 14:52:25,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:25,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833395438] [2021-08-06 14:52:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:25,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:25,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:25,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833395438] [2021-08-06 14:52:25,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833395438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:25,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897086241] [2021-08-06 14:52:25,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:52:25,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:25,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:25,927 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) [2021-08-06 14:52:25,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 14:52:29,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:52:29,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:52:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:29,529 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:52:29,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:52:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:29,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897086241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:29,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:29,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:52:29,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537470904] [2021-08-06 14:52:29,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:52:29,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:29,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:52:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:52:29,674 INFO L87 Difference]: Start difference. First operand 1548 states and 5410 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:30,931 INFO L93 Difference]: Finished difference Result 1816 states and 6190 transitions. [2021-08-06 14:52:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:52:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:52:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:30,935 INFO L225 Difference]: With dead ends: 1816 [2021-08-06 14:52:30,935 INFO L226 Difference]: Without dead ends: 1783 [2021-08-06 14:52:30,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 913.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:52:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-08-06 14:52:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1558. [2021-08-06 14:52:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.4919717405266537) internal successors, (5437), 1557 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5437 transitions. [2021-08-06 14:52:30,955 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5437 transitions. Word has length 24 [2021-08-06 14:52:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:30,955 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 5437 transitions. [2021-08-06 14:52:30,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5437 transitions. [2021-08-06 14:52:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:30,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:30,957 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:30,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 14:52:31,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 14:52:31,158 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:31,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2010926510, now seen corresponding path program 20 times [2021-08-06 14:52:31,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:31,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919773959] [2021-08-06 14:52:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:31,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:31,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:31,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919773959] [2021-08-06 14:52:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919773959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:31,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625023127] [2021-08-06 14:52:31,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:52:31,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:31,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:31,496 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) [2021-08-06 14:52:31,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 14:52:34,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:52:34,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:52:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:35,594 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:52:35,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:52:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:35,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625023127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:35,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:35,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:52:35,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711833471] [2021-08-06 14:52:35,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:52:35,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:35,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:52:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:52:35,662 INFO L87 Difference]: Start difference. First operand 1558 states and 5437 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:52:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:37,145 INFO L93 Difference]: Finished difference Result 2252 states and 7466 transitions. [2021-08-06 14:52:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:52:37,145 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:52:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:37,149 INFO L225 Difference]: With dead ends: 2252 [2021-08-06 14:52:37,149 INFO L226 Difference]: Without dead ends: 2190 [2021-08-06 14:52:37,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1048.7ms TimeCoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:52:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-08-06 14:52:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1594. [2021-08-06 14:52:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.504708097928437) internal successors, (5583), 1593 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5583 transitions. [2021-08-06 14:52:37,174 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5583 transitions. Word has length 24 [2021-08-06 14:52:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:37,174 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 5583 transitions. [2021-08-06 14:52:37,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:52:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5583 transitions. [2021-08-06 14:52:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:37,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:37,176 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:37,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 14:52:37,377 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,SelfDestructingSolverStorable123 [2021-08-06 14:52:37,377 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:37,377 INFO L82 PathProgramCache]: Analyzing trace with hash 397445098, now seen corresponding path program 21 times [2021-08-06 14:52:37,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:37,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893929568] [2021-08-06 14:52:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:37,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:37,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893929568] [2021-08-06 14:52:37,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893929568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130421492] [2021-08-06 14:52:37,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:52:37,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:37,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:37,744 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) [2021-08-06 14:52:37,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 14:52:41,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:52:41,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:41,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:52:41,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:41,476 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-08-06 14:52:41,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 48 [2021-08-06 14:52:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:42,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130421492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:42,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:42,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:52:42,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106851481] [2021-08-06 14:52:42,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:52:42,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:52:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:52:42,008 INFO L87 Difference]: Start difference. First operand 1594 states and 5583 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:52:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:43,415 INFO L93 Difference]: Finished difference Result 1764 states and 6083 transitions. [2021-08-06 14:52:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:52:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:52:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:43,419 INFO L225 Difference]: With dead ends: 1764 [2021-08-06 14:52:43,419 INFO L226 Difference]: Without dead ends: 1738 [2021-08-06 14:52:43,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1210.8ms TimeCoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:52:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-08-06 14:52:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1599. [2021-08-06 14:52:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.502503128911139) internal successors, (5597), 1598 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5597 transitions. [2021-08-06 14:52:43,441 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5597 transitions. Word has length 24 [2021-08-06 14:52:43,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:43,441 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 5597 transitions. [2021-08-06 14:52:43,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:52:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5597 transitions. [2021-08-06 14:52:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:43,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:43,444 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:43,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 14:52:43,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:43,645 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1465733774, now seen corresponding path program 22 times [2021-08-06 14:52:43,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:43,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886823477] [2021-08-06 14:52:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:43,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:44,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:44,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886823477] [2021-08-06 14:52:44,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886823477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:44,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028479875] [2021-08-06 14:52:44,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:52:44,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:44,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:44,012 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) [2021-08-06 14:52:44,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 14:52:47,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:52:47,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:47,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:52:47,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:47,766 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:52:47,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:52:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:47,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028479875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:47,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:47,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:52:47,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87242421] [2021-08-06 14:52:47,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:52:47,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:52:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:52:47,900 INFO L87 Difference]: Start difference. First operand 1599 states and 5597 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:48,794 INFO L93 Difference]: Finished difference Result 1823 states and 6246 transitions. [2021-08-06 14:52:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:52:48,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:52:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:48,799 INFO L225 Difference]: With dead ends: 1823 [2021-08-06 14:52:48,799 INFO L226 Difference]: Without dead ends: 1789 [2021-08-06 14:52:48,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 732.8ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:52:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-08-06 14:52:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1599. [2021-08-06 14:52:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.5037546933667083) internal successors, (5599), 1598 states have internal predecessors, (5599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5599 transitions. [2021-08-06 14:52:48,821 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5599 transitions. Word has length 24 [2021-08-06 14:52:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:48,821 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 5599 transitions. [2021-08-06 14:52:48,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:48,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5599 transitions. [2021-08-06 14:52:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:48,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:48,824 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:48,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 14:52:49,024 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,SelfDestructingSolverStorable125 [2021-08-06 14:52:49,024 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2079919075, now seen corresponding path program 70 times [2021-08-06 14:52:49,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:49,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803763278] [2021-08-06 14:52:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:49,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:49,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:49,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803763278] [2021-08-06 14:52:49,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803763278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:49,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657365495] [2021-08-06 14:52:49,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:52:49,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:49,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:49,340 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) [2021-08-06 14:52:49,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 14:52:52,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:52:52,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:52,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:52:52,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:53,079 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:52:53,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:52:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:53,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657365495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:53,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:53,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:52:53,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19870792] [2021-08-06 14:52:53,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:52:53,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:52:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:52:53,232 INFO L87 Difference]: Start difference. First operand 1599 states and 5599 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:54,255 INFO L93 Difference]: Finished difference Result 1832 states and 6291 transitions. [2021-08-06 14:52:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:52:54,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:52:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:54,260 INFO L225 Difference]: With dead ends: 1832 [2021-08-06 14:52:54,260 INFO L226 Difference]: Without dead ends: 1822 [2021-08-06 14:52:54,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:52:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-08-06 14:52:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1616. [2021-08-06 14:52:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 3.5065015479876163) internal successors, (5663), 1615 states have internal predecessors, (5663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5663 transitions. [2021-08-06 14:52:54,287 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5663 transitions. Word has length 24 [2021-08-06 14:52:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:54,287 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 5663 transitions. [2021-08-06 14:52:54,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5663 transitions. [2021-08-06 14:52:54,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:54,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:54,291 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:54,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 14:52:54,508 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,SelfDestructingSolverStorable126 [2021-08-06 14:52:54,508 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:54,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1647479281, now seen corresponding path program 71 times [2021-08-06 14:52:54,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:54,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251770733] [2021-08-06 14:52:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:54,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:54,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:54,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251770733] [2021-08-06 14:52:54,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251770733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:54,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266822896] [2021-08-06 14:52:54,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:52:54,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:54,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:54,858 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) [2021-08-06 14:52:54,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 14:52:58,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:52:58,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:58,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:52:58,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:58,618 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:52:58,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:52:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:58,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266822896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:58,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:58,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:52:58,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575356470] [2021-08-06 14:52:58,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:52:58,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:52:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:52:58,775 INFO L87 Difference]: Start difference. First operand 1616 states and 5663 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:59,703 INFO L93 Difference]: Finished difference Result 1912 states and 6513 transitions. [2021-08-06 14:52:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:52:59,704 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:52:59,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:59,708 INFO L225 Difference]: With dead ends: 1912 [2021-08-06 14:52:59,708 INFO L226 Difference]: Without dead ends: 1901 [2021-08-06 14:52:59,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 705.3ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:52:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2021-08-06 14:52:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1624. [2021-08-06 14:52:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.5113986444855207) internal successors, (5699), 1623 states have internal predecessors, (5699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:52:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5699 transitions. [2021-08-06 14:52:59,741 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5699 transitions. Word has length 24 [2021-08-06 14:52:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:59,741 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 5699 transitions. [2021-08-06 14:52:59,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:52:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5699 transitions. [2021-08-06 14:52:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:52:59,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:59,745 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:59,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 14:52:59,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:59,947 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:52:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:59,947 INFO L82 PathProgramCache]: Analyzing trace with hash -270978790, now seen corresponding path program 23 times [2021-08-06 14:52:59,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:59,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687474484] [2021-08-06 14:52:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:59,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:00,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:00,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687474484] [2021-08-06 14:53:00,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687474484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:00,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38436961] [2021-08-06 14:53:00,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:53:00,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:00,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:00,281 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) [2021-08-06 14:53:00,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 14:53:03,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:53:03,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:03,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:53:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:04,053 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:53:04,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:53:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:04,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38436961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:04,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:04,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:53:04,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418495954] [2021-08-06 14:53:04,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:53:04,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:04,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:53:04,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:53:04,273 INFO L87 Difference]: Start difference. First operand 1624 states and 5699 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:53:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:05,209 INFO L93 Difference]: Finished difference Result 1821 states and 6281 transitions. [2021-08-06 14:53:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:53:05,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:53:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:05,213 INFO L225 Difference]: With dead ends: 1821 [2021-08-06 14:53:05,213 INFO L226 Difference]: Without dead ends: 1812 [2021-08-06 14:53:05,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 706.1ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:53:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-08-06 14:53:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1631. [2021-08-06 14:53:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.514723926380368) internal successors, (5729), 1630 states have internal predecessors, (5729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5729 transitions. [2021-08-06 14:53:05,239 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5729 transitions. Word has length 24 [2021-08-06 14:53:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:05,239 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 5729 transitions. [2021-08-06 14:53:05,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:53:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5729 transitions. [2021-08-06 14:53:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:53:05,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:05,242 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:05,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 14:53:05,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:05,442 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:53:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:05,443 INFO L82 PathProgramCache]: Analyzing trace with hash 797309886, now seen corresponding path program 24 times [2021-08-06 14:53:05,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:05,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631015400] [2021-08-06 14:53:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:05,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:05,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:05,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631015400] [2021-08-06 14:53:05,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631015400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:05,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982697103] [2021-08-06 14:53:05,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:53:05,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:05,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:05,751 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) [2021-08-06 14:53:05,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 14:53:09,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:53:09,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:09,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:53:09,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:09,612 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:53:09,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:53:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:09,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982697103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:09,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:09,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:53:09,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671224495] [2021-08-06 14:53:09,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:53:09,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:09,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:53:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:53:09,770 INFO L87 Difference]: Start difference. First operand 1631 states and 5729 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:53:10,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:10,619 INFO L93 Difference]: Finished difference Result 1903 states and 6515 transitions. [2021-08-06 14:53:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:53:10,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:53:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:10,624 INFO L225 Difference]: With dead ends: 1903 [2021-08-06 14:53:10,624 INFO L226 Difference]: Without dead ends: 1892 [2021-08-06 14:53:10,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 638.5ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:53:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-08-06 14:53:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1635. [2021-08-06 14:53:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.518359853121175) internal successors, (5749), 1634 states have internal predecessors, (5749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5749 transitions. [2021-08-06 14:53:10,658 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5749 transitions. Word has length 24 [2021-08-06 14:53:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:10,658 INFO L470 AbstractCegarLoop]: Abstraction has 1635 states and 5749 transitions. [2021-08-06 14:53:10,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:53:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5749 transitions. [2021-08-06 14:53:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:53:10,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:10,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:10,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 14:53:10,861 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,SelfDestructingSolverStorable129 [2021-08-06 14:53:10,861 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:53:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1627635561, now seen corresponding path program 72 times [2021-08-06 14:53:10,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:10,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550964329] [2021-08-06 14:53:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:10,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:11,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:11,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550964329] [2021-08-06 14:53:11,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550964329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:11,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146981294] [2021-08-06 14:53:11,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:53:11,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:11,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:11,195 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) [2021-08-06 14:53:11,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 14:53:14,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:53:14,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:14,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:53:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:15,183 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-08-06 14:53:15,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 45 [2021-08-06 14:53:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:15,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146981294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:15,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:15,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-08-06 14:53:15,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073332950] [2021-08-06 14:53:15,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:53:15,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:53:15,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:53:15,530 INFO L87 Difference]: Start difference. First operand 1635 states and 5749 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:53:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:17,033 INFO L93 Difference]: Finished difference Result 1921 states and 6540 transitions. [2021-08-06 14:53:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 14:53:17,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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 24 [2021-08-06 14:53:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:17,037 INFO L225 Difference]: With dead ends: 1921 [2021-08-06 14:53:17,037 INFO L226 Difference]: Without dead ends: 1909 [2021-08-06 14:53:17,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1080.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:53:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-08-06 14:53:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1643. [2021-08-06 14:53:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 3.520706455542022) internal successors, (5781), 1642 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5781 transitions. [2021-08-06 14:53:17,064 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5781 transitions. Word has length 24 [2021-08-06 14:53:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:17,064 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 5781 transitions. [2021-08-06 14:53:17,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2021-08-06 14:53:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5781 transitions. [2021-08-06 14:53:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:53:17,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:17,067 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:17,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 14:53:17,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:17,267 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:53:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1551800146, now seen corresponding path program 25 times [2021-08-06 14:53:17,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:17,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988551505] [2021-08-06 14:53:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:17,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:17,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:17,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988551505] [2021-08-06 14:53:17,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988551505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:17,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278029988] [2021-08-06 14:53:17,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:53:17,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:17,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:17,560 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) [2021-08-06 14:53:17,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 14:53:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:21,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:53:21,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:21,531 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:53:21,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:53:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:21,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278029988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:21,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:21,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:53:21,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711061964] [2021-08-06 14:53:21,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:53:21,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:21,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:53:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:53:21,656 INFO L87 Difference]: Start difference. First operand 1643 states and 5781 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:53:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:22,797 INFO L93 Difference]: Finished difference Result 2020 states and 6848 transitions. [2021-08-06 14:53:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:53:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 24 [2021-08-06 14:53:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:22,802 INFO L225 Difference]: With dead ends: 2020 [2021-08-06 14:53:22,802 INFO L226 Difference]: Without dead ends: 2009 [2021-08-06 14:53:22,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 767.0ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:53:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-08-06 14:53:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1646. [2021-08-06 14:53:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 3.5282674772036473) internal successors, (5804), 1645 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 5804 transitions. [2021-08-06 14:53:22,848 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 5804 transitions. Word has length 24 [2021-08-06 14:53:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:22,848 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 5804 transitions. [2021-08-06 14:53:22,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-06 14:53:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 5804 transitions. [2021-08-06 14:53:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:53:22,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:22,853 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:22,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 14:53:23,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:23,069 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:53:23,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash -165129892, now seen corresponding path program 26 times [2021-08-06 14:53:23,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:23,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473112312] [2021-08-06 14:53:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:23,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:23,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:23,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473112312] [2021-08-06 14:53:23,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473112312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:23,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032518632] [2021-08-06 14:53:23,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:53:23,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:23,370 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) [2021-08-06 14:53:23,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 14:53:27,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:53:27,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:27,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:53:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:27,890 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:53:27,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:53:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:27,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032518632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:27,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:27,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-08-06 14:53:27,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116381610] [2021-08-06 14:53:27,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:53:27,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:53:27,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:53:27,968 INFO L87 Difference]: Start difference. First operand 1646 states and 5804 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:30,164 INFO L93 Difference]: Finished difference Result 2146 states and 7267 transitions. [2021-08-06 14:53:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:53:30,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:53:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:30,169 INFO L225 Difference]: With dead ends: 2146 [2021-08-06 14:53:30,169 INFO L226 Difference]: Without dead ends: 2130 [2021-08-06 14:53:30,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1600.6ms TimeCoverageRelationStatistics Valid=277, Invalid=2273, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 14:53:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-08-06 14:53:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1654. [2021-08-06 14:53:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.5269207501512403) internal successors, (5830), 1653 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5830 transitions. [2021-08-06 14:53:30,196 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5830 transitions. Word has length 24 [2021-08-06 14:53:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:30,197 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 5830 transitions. [2021-08-06 14:53:30,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5830 transitions. [2021-08-06 14:53:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:53:30,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:30,200 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:30,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 14:53:30,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:30,413 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:53:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:30,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1097131482, now seen corresponding path program 27 times [2021-08-06 14:53:30,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:30,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857327435] [2021-08-06 14:53:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:30,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:30,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:30,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857327435] [2021-08-06 14:53:30,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857327435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:30,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609052228] [2021-08-06 14:53:30,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:53:30,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:30,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:30,727 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) [2021-08-06 14:53:30,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 14:53:34,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:53:34,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:34,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:53:34,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:35,072 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-08-06 14:53:35,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2021-08-06 14:53:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:35,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609052228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:35,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:35,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-08-06 14:53:35,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205887684] [2021-08-06 14:53:35,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:53:35,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:35,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:53:35,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:53:35,353 INFO L87 Difference]: Start difference. First operand 1654 states and 5830 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:37,630 INFO L93 Difference]: Finished difference Result 2312 states and 7928 transitions. [2021-08-06 14:53:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 14:53:37,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:53:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:37,634 INFO L225 Difference]: With dead ends: 2312 [2021-08-06 14:53:37,634 INFO L226 Difference]: Without dead ends: 2303 [2021-08-06 14:53:37,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1903.8ms TimeCoverageRelationStatistics Valid=387, Invalid=2475, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 14:53:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-08-06 14:53:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1655. [2021-08-06 14:53:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 3.5272067714631197) internal successors, (5834), 1654 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 5834 transitions. [2021-08-06 14:53:37,663 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 5834 transitions. Word has length 24 [2021-08-06 14:53:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:37,663 INFO L470 AbstractCegarLoop]: Abstraction has 1655 states and 5834 transitions. [2021-08-06 14:53:37,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 5834 transitions. [2021-08-06 14:53:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:53:37,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:37,666 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:37,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 14:53:37,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:37,869 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:53:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1639388738, now seen corresponding path program 28 times [2021-08-06 14:53:37,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:37,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584298307] [2021-08-06 14:53:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:37,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:38,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:38,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584298307] [2021-08-06 14:53:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584298307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:38,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533222585] [2021-08-06 14:53:38,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:53:38,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:38,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:38,230 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) [2021-08-06 14:53:38,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 14:53:41,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:53:41,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:41,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:53:41,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:42,594 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:53:42,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:53:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:42,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533222585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:42,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:42,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:53:42,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729885182] [2021-08-06 14:53:42,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:53:42,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:53:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:53:42,665 INFO L87 Difference]: Start difference. First operand 1655 states and 5834 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:53:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:45,744 INFO L93 Difference]: Finished difference Result 2477 states and 8417 transitions. [2021-08-06 14:53:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 14:53:45,745 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:53:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:45,750 INFO L225 Difference]: With dead ends: 2477 [2021-08-06 14:53:45,750 INFO L226 Difference]: Without dead ends: 2448 [2021-08-06 14:53:45,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 2170.8ms TimeCoverageRelationStatistics Valid=531, Invalid=3501, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 14:53:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-08-06 14:53:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 1663. [2021-08-06 14:53:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.5276774969915765) internal successors, (5863), 1662 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5863 transitions. [2021-08-06 14:53:45,775 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5863 transitions. Word has length 24 [2021-08-06 14:53:45,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:45,776 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 5863 transitions. [2021-08-06 14:53:45,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:53:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5863 transitions. [2021-08-06 14:53:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:53:45,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:45,778 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:45,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 14:53:45,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 14:53:45,979 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:53:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1511154846, now seen corresponding path program 29 times [2021-08-06 14:53:45,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:45,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76704478] [2021-08-06 14:53:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:45,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:46,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:46,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76704478] [2021-08-06 14:53:46,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76704478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:46,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904640476] [2021-08-06 14:53:46,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:53:46,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:46,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:46,334 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) [2021-08-06 14:53:46,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 14:53:50,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:53:50,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:50,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:53:50,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:50,894 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:53:50,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:53:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:50,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904640476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:50,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:50,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-06 14:53:50,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544150270] [2021-08-06 14:53:50,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:53:50,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:53:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:53:50,975 INFO L87 Difference]: Start difference. First operand 1663 states and 5863 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:53:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:53,052 INFO L93 Difference]: Finished difference Result 2345 states and 7987 transitions. [2021-08-06 14:53:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 14:53:53,053 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:53:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:53,057 INFO L225 Difference]: With dead ends: 2345 [2021-08-06 14:53:53,057 INFO L226 Difference]: Without dead ends: 2306 [2021-08-06 14:53:53,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1606.3ms TimeCoverageRelationStatistics Valid=387, Invalid=2369, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 14:53:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-08-06 14:53:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1664. [2021-08-06 14:53:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 3.5279615153337343) internal successors, (5867), 1663 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 5867 transitions. [2021-08-06 14:53:53,085 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 5867 transitions. Word has length 24 [2021-08-06 14:53:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:53,085 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 5867 transitions. [2021-08-06 14:53:53,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:53:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 5867 transitions. [2021-08-06 14:53:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:53:53,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:53,087 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:53,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 14:53:53,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 14:53:53,288 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:53:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:53,288 INFO L82 PathProgramCache]: Analyzing trace with hash 897216762, now seen corresponding path program 30 times [2021-08-06 14:53:53,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:53,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998829086] [2021-08-06 14:53:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:53,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:53,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:53,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998829086] [2021-08-06 14:53:53,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998829086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:53,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264081325] [2021-08-06 14:53:53,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:53:53,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:53,650 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) [2021-08-06 14:53:53,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 14:53:57,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:53:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:53:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:53:57,884 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:53:57,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-08-06 14:53:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:58,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264081325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:58,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:58,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 14:53:58,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137553948] [2021-08-06 14:53:58,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:53:58,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:58,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:53:58,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:53:58,169 INFO L87 Difference]: Start difference. First operand 1664 states and 5867 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:53:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:59,350 INFO L93 Difference]: Finished difference Result 2016 states and 7050 transitions. [2021-08-06 14:53:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:53:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:53:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:59,355 INFO L225 Difference]: With dead ends: 2016 [2021-08-06 14:53:59,355 INFO L226 Difference]: Without dead ends: 2008 [2021-08-06 14:53:59,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 977.0ms TimeCoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 14:53:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-08-06 14:53:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1668. [2021-08-06 14:53:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 3.5266946610677863) internal successors, (5879), 1667 states have internal predecessors, (5879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:53:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 5879 transitions. [2021-08-06 14:53:59,378 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 5879 transitions. Word has length 24 [2021-08-06 14:53:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:59,378 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 5879 transitions. [2021-08-06 14:53:59,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:53:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 5879 transitions. [2021-08-06 14:53:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:53:59,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:59,380 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:59,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 14:53:59,581 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,SelfDestructingSolverStorable136 [2021-08-06 14:53:59,581 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:53:59,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1965505438, now seen corresponding path program 31 times [2021-08-06 14:53:59,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:59,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231543117] [2021-08-06 14:53:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:59,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:59,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:59,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231543117] [2021-08-06 14:53:59,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231543117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:59,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566718043] [2021-08-06 14:53:59,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:53:59,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:59,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:59,996 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) [2021-08-06 14:53:59,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 14:54:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:03,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:54:03,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:04,444 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:54:04,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:54:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:04,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566718043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:04,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:04,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:54:04,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461608618] [2021-08-06 14:54:04,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:54:04,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:04,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:54:04,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:54:04,592 INFO L87 Difference]: Start difference. First operand 1668 states and 5879 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:54:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:05,942 INFO L93 Difference]: Finished difference Result 2172 states and 7472 transitions. [2021-08-06 14:54:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:54:05,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:54:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:05,946 INFO L225 Difference]: With dead ends: 2172 [2021-08-06 14:54:05,946 INFO L226 Difference]: Without dead ends: 2153 [2021-08-06 14:54:05,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1079.0ms TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:54:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-08-06 14:54:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1671. [2021-08-06 14:54:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.5263473053892214) internal successors, (5889), 1670 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5889 transitions. [2021-08-06 14:54:05,972 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5889 transitions. Word has length 24 [2021-08-06 14:54:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:05,973 INFO L470 AbstractCegarLoop]: Abstraction has 1671 states and 5889 transitions. [2021-08-06 14:54:05,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:54:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5889 transitions. [2021-08-06 14:54:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:54:05,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:05,975 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:54:06,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 14:54:06,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:06,176 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:54:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:06,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1295561030, now seen corresponding path program 32 times [2021-08-06 14:54:06,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:06,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889370477] [2021-08-06 14:54:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:06,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:06,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:06,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889370477] [2021-08-06 14:54:06,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889370477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:06,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65116598] [2021-08-06 14:54:06,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:54:06,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:06,505 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) [2021-08-06 14:54:06,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 14:54:10,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:54:10,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:10,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:54:10,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:11,362 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:54:11,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:54:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:11,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65116598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:11,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:11,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-08-06 14:54:11,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819370255] [2021-08-06 14:54:11,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:54:11,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:54:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:54:11,440 INFO L87 Difference]: Start difference. First operand 1671 states and 5889 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:13,684 INFO L93 Difference]: Finished difference Result 2412 states and 8153 transitions. [2021-08-06 14:54:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:54:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:54:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:13,689 INFO L225 Difference]: With dead ends: 2412 [2021-08-06 14:54:13,689 INFO L226 Difference]: Without dead ends: 2394 [2021-08-06 14:54:13,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1697.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 14:54:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2021-08-06 14:54:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1673. [2021-08-06 14:54:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.52811004784689) internal successors, (5899), 1672 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5899 transitions. [2021-08-06 14:54:13,716 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5899 transitions. Word has length 24 [2021-08-06 14:54:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:13,716 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 5899 transitions. [2021-08-06 14:54:13,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5899 transitions. [2021-08-06 14:54:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:54:13,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:13,720 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:54:13,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 14:54:13,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:13,921 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:54:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1871178360, now seen corresponding path program 33 times [2021-08-06 14:54:13,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:13,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842767933] [2021-08-06 14:54:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:13,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:14,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:14,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842767933] [2021-08-06 14:54:14,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842767933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:14,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104071753] [2021-08-06 14:54:14,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:54:14,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:14,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:14,266 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) [2021-08-06 14:54:14,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 14:54:18,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:54:18,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:18,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:54:18,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:18,905 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-08-06 14:54:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2021-08-06 14:54:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:19,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104071753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:19,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:19,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-08-06 14:54:19,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083175270] [2021-08-06 14:54:19,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:54:19,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:54:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:54:19,215 INFO L87 Difference]: Start difference. First operand 1673 states and 5899 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:22,221 INFO L93 Difference]: Finished difference Result 3019 states and 10326 transitions. [2021-08-06 14:54:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 14:54:22,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:54:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:22,227 INFO L225 Difference]: With dead ends: 3019 [2021-08-06 14:54:22,227 INFO L226 Difference]: Without dead ends: 3010 [2021-08-06 14:54:22,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2383.8ms TimeCoverageRelationStatistics Valid=433, Invalid=3227, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 14:54:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2021-08-06 14:54:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 1671. [2021-08-06 14:54:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.5263473053892214) internal successors, (5889), 1670 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5889 transitions. [2021-08-06 14:54:22,259 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5889 transitions. Word has length 24 [2021-08-06 14:54:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:22,259 INFO L470 AbstractCegarLoop]: Abstraction has 1671 states and 5889 transitions. [2021-08-06 14:54:22,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5889 transitions. [2021-08-06 14:54:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:54:22,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:22,262 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:54:22,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 14:54:22,464 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,SelfDestructingSolverStorable139 [2021-08-06 14:54:22,464 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:54:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:22,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1942035164, now seen corresponding path program 34 times [2021-08-06 14:54:22,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:22,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337177883] [2021-08-06 14:54:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:22,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:22,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:22,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337177883] [2021-08-06 14:54:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337177883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:22,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569572697] [2021-08-06 14:54:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:54:22,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:22,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:22,871 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) [2021-08-06 14:54:22,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 14:54:26,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:54:26,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:54:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:27,348 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:54:27,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:54:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:27,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569572697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:27,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:27,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:54:27,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404564379] [2021-08-06 14:54:27,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:54:27,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:27,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:54:27,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:54:27,488 INFO L87 Difference]: Start difference. First operand 1671 states and 5889 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:54:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:28,592 INFO L93 Difference]: Finished difference Result 2131 states and 7383 transitions. [2021-08-06 14:54:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:54:28,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:54:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:28,597 INFO L225 Difference]: With dead ends: 2131 [2021-08-06 14:54:28,597 INFO L226 Difference]: Without dead ends: 2114 [2021-08-06 14:54:28,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:54:28,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-08-06 14:54:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1662. [2021-08-06 14:54:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.5285972305839857) internal successors, (5861), 1661 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5861 transitions. [2021-08-06 14:54:28,622 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5861 transitions. Word has length 24 [2021-08-06 14:54:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:28,622 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 5861 transitions. [2021-08-06 14:54:28,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:54:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5861 transitions. [2021-08-06 14:54:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:54:28,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:28,625 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:54:28,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 14:54:28,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:28,826 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:54:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:28,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1702841940, now seen corresponding path program 35 times [2021-08-06 14:54:28,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:28,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964403581] [2021-08-06 14:54:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:28,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:29,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:29,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964403581] [2021-08-06 14:54:29,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964403581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:29,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824280149] [2021-08-06 14:54:29,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:54:29,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:29,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:29,145 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) [2021-08-06 14:54:29,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 14:54:33,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:54:33,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:33,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:54:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:33,878 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:54:33,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:54:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:33,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824280149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:33,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:33,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2021-08-06 14:54:33,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807139586] [2021-08-06 14:54:33,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:54:33,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:33,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:54:33,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:54:33,955 INFO L87 Difference]: Start difference. First operand 1662 states and 5861 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:54:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:36,255 INFO L93 Difference]: Finished difference Result 2802 states and 9597 transitions. [2021-08-06 14:54:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 14:54:36,255 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:54:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:36,261 INFO L225 Difference]: With dead ends: 2802 [2021-08-06 14:54:36,261 INFO L226 Difference]: Without dead ends: 2792 [2021-08-06 14:54:36,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1390.7ms TimeCoverageRelationStatistics Valid=302, Invalid=2454, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 14:54:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-08-06 14:54:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 1666. [2021-08-06 14:54:36,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.527327327327327) internal successors, (5873), 1665 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5873 transitions. [2021-08-06 14:54:36,295 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5873 transitions. Word has length 24 [2021-08-06 14:54:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:36,295 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 5873 transitions. [2021-08-06 14:54:36,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:54:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5873 transitions. [2021-08-06 14:54:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:54:36,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:36,298 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:54:36,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-06 14:54:36,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:36,498 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:54:36,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:36,499 INFO L82 PathProgramCache]: Analyzing trace with hash 968307736, now seen corresponding path program 36 times [2021-08-06 14:54:36,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:36,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701505190] [2021-08-06 14:54:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:36,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:36,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:36,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701505190] [2021-08-06 14:54:36,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701505190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:36,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467449929] [2021-08-06 14:54:36,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:54:36,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:36,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:36,826 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) [2021-08-06 14:54:36,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 14:54:40,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:54:40,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:40,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:54:40,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:41,638 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:54:41,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 29 [2021-08-06 14:54:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:41,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467449929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:41,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:41,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-08-06 14:54:41,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12315635] [2021-08-06 14:54:41,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:54:41,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:41,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:54:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:54:41,705 INFO L87 Difference]: Start difference. First operand 1666 states and 5873 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:54:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:43,702 INFO L93 Difference]: Finished difference Result 2064 states and 7060 transitions. [2021-08-06 14:54:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:54:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:54:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:43,707 INFO L225 Difference]: With dead ends: 2064 [2021-08-06 14:54:43,707 INFO L226 Difference]: Without dead ends: 2046 [2021-08-06 14:54:43,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1398.8ms TimeCoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 14:54:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-08-06 14:54:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1669. [2021-08-06 14:54:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.52757793764988) internal successors, (5884), 1668 states have internal predecessors, (5884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5884 transitions. [2021-08-06 14:54:43,732 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5884 transitions. Word has length 24 [2021-08-06 14:54:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:43,732 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 5884 transitions. [2021-08-06 14:54:43,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:54:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5884 transitions. [2021-08-06 14:54:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:54:43,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:43,734 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:54:43,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-06 14:54:43,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:43,935 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:54:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:43,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1064085088, now seen corresponding path program 37 times [2021-08-06 14:54:43,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:43,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286715534] [2021-08-06 14:54:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:43,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:44,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:44,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286715534] [2021-08-06 14:54:44,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286715534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:44,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687926159] [2021-08-06 14:54:44,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:54:44,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:44,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:44,279 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) [2021-08-06 14:54:44,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 14:54:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:48,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:54:48,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:48,973 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:54:48,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:54:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:49,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687926159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:49,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:49,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:54:49,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601229723] [2021-08-06 14:54:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:54:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:54:49,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:54:49,042 INFO L87 Difference]: Start difference. First operand 1669 states and 5884 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:54:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:51,766 INFO L93 Difference]: Finished difference Result 2303 states and 7907 transitions. [2021-08-06 14:54:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 14:54:51,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:54:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:51,772 INFO L225 Difference]: With dead ends: 2303 [2021-08-06 14:54:51,772 INFO L226 Difference]: Without dead ends: 2293 [2021-08-06 14:54:51,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 2012.1ms TimeCoverageRelationStatistics Valid=381, Invalid=2375, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 14:54:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-08-06 14:54:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1674. [2021-08-06 14:54:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.5301852958756723) internal successors, (5906), 1673 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:54:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5906 transitions. [2021-08-06 14:54:51,800 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5906 transitions. Word has length 24 [2021-08-06 14:54:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:51,800 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 5906 transitions. [2021-08-06 14:54:51,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:54:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5906 transitions. [2021-08-06 14:54:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:54:51,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:51,802 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:54:51,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 14:54:52,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-08-06 14:54:52,004 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:54:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:52,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1294638696, now seen corresponding path program 38 times [2021-08-06 14:54:52,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:52,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155685839] [2021-08-06 14:54:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:52,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:52,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:52,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155685839] [2021-08-06 14:54:52,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155685839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:52,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587560736] [2021-08-06 14:54:52,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:54:52,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:52,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:52,390 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) [2021-08-06 14:54:52,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 14:54:56,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:54:56,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:54:56,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:57,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:54:57,219 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:54:57,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 54 [2021-08-06 14:54:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:57,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587560736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:57,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:57,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-06 14:54:57,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3161684] [2021-08-06 14:54:57,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:54:57,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:57,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:54:57,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:54:57,451 INFO L87 Difference]: Start difference. First operand 1674 states and 5906 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:00,125 INFO L93 Difference]: Finished difference Result 2395 states and 8185 transitions. [2021-08-06 14:55:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 14:55:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:55:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:00,130 INFO L225 Difference]: With dead ends: 2395 [2021-08-06 14:55:00,130 INFO L226 Difference]: Without dead ends: 2376 [2021-08-06 14:55:00,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 2154.0ms TimeCoverageRelationStatistics Valid=503, Invalid=2577, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 14:55:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-08-06 14:55:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1674. [2021-08-06 14:55:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.5301852958756723) internal successors, (5906), 1673 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5906 transitions. [2021-08-06 14:55:00,156 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5906 transitions. Word has length 24 [2021-08-06 14:55:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:00,156 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 5906 transitions. [2021-08-06 14:55:00,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5906 transitions. [2021-08-06 14:55:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:55:00,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:00,158 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:55:00,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 14:55:00,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 14:55:00,359 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:55:00,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:00,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1571633696, now seen corresponding path program 39 times [2021-08-06 14:55:00,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:00,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935723852] [2021-08-06 14:55:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:00,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:00,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:00,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935723852] [2021-08-06 14:55:00,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935723852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:00,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394988680] [2021-08-06 14:55:00,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:55:00,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:00,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:00,760 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) [2021-08-06 14:55:00,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 14:55:04,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:55:04,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:04,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:55:04,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:05,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:55:05,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:55:05,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:55:05,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 56 [2021-08-06 14:55:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:05,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394988680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:05,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:05,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-08-06 14:55:05,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473238233] [2021-08-06 14:55:05,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:55:05,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:55:05,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:55:05,930 INFO L87 Difference]: Start difference. First operand 1674 states and 5906 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:10,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:10,070 INFO L93 Difference]: Finished difference Result 2183 states and 7426 transitions. [2021-08-06 14:55:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 14:55:10,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:55:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:10,075 INFO L225 Difference]: With dead ends: 2183 [2021-08-06 14:55:10,075 INFO L226 Difference]: Without dead ends: 2174 [2021-08-06 14:55:10,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 3749.0ms TimeCoverageRelationStatistics Valid=608, Invalid=3814, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 14:55:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-08-06 14:55:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1693. [2021-08-06 14:55:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.528368794326241) internal successors, (5970), 1692 states have internal predecessors, (5970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5970 transitions. [2021-08-06 14:55:10,100 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5970 transitions. Word has length 24 [2021-08-06 14:55:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:10,100 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 5970 transitions. [2021-08-06 14:55:10,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5970 transitions. [2021-08-06 14:55:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:55:10,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:10,103 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:55:10,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-06 14:55:10,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 14:55:10,303 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:55:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:10,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1889595160, now seen corresponding path program 40 times [2021-08-06 14:55:10,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:10,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228543377] [2021-08-06 14:55:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:10,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:10,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:10,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228543377] [2021-08-06 14:55:10,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228543377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:10,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553500976] [2021-08-06 14:55:10,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:55:10,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:10,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:10,677 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) [2021-08-06 14:55:10,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 14:55:14,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:55:14,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:14,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:55:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:15,379 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:55:15,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 28 [2021-08-06 14:55:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:15,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553500976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:15,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:15,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:55:15,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255969473] [2021-08-06 14:55:15,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:55:15,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:55:15,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:55:15,529 INFO L87 Difference]: Start difference. First operand 1693 states and 5970 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:55:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:16,893 INFO L93 Difference]: Finished difference Result 2072 states and 7216 transitions. [2021-08-06 14:55:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:55:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:55:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:16,897 INFO L225 Difference]: With dead ends: 2072 [2021-08-06 14:55:16,897 INFO L226 Difference]: Without dead ends: 2061 [2021-08-06 14:55:16,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1063.6ms TimeCoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:55:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-08-06 14:55:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1691. [2021-08-06 14:55:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.5313609467455622) internal successors, (5968), 1690 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5968 transitions. [2021-08-06 14:55:16,923 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5968 transitions. Word has length 24 [2021-08-06 14:55:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:16,923 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5968 transitions. [2021-08-06 14:55:16,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:55:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5968 transitions. [2021-08-06 14:55:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:55:16,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:16,925 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:55:16,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 14:55:17,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 14:55:17,126 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:55:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash -744977244, now seen corresponding path program 41 times [2021-08-06 14:55:17,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:17,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965613172] [2021-08-06 14:55:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:17,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:17,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:17,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965613172] [2021-08-06 14:55:17,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965613172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:17,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356752937] [2021-08-06 14:55:17,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:55:17,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:17,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:17,451 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) [2021-08-06 14:55:17,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 14:55:21,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:55:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:21,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:55:21,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:22,391 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:55:22,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:55:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:22,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356752937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:22,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:22,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:55:22,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895189657] [2021-08-06 14:55:22,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:55:22,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:22,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:55:22,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:55:22,463 INFO L87 Difference]: Start difference. First operand 1691 states and 5968 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:55:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:24,641 INFO L93 Difference]: Finished difference Result 2281 states and 7825 transitions. [2021-08-06 14:55:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 14:55:24,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:55:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:24,646 INFO L225 Difference]: With dead ends: 2281 [2021-08-06 14:55:24,646 INFO L226 Difference]: Without dead ends: 2272 [2021-08-06 14:55:24,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1593.1ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 14:55:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-08-06 14:55:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1691. [2021-08-06 14:55:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.5313609467455622) internal successors, (5968), 1690 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5968 transitions. [2021-08-06 14:55:24,674 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5968 transitions. Word has length 24 [2021-08-06 14:55:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:24,674 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5968 transitions. [2021-08-06 14:55:24,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:55:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5968 transitions. [2021-08-06 14:55:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:55:24,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:24,677 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:55:24,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 14:55:24,877 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,SelfDestructingSolverStorable147 [2021-08-06 14:55:24,877 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:55:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1184882548, now seen corresponding path program 42 times [2021-08-06 14:55:24,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:24,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176534602] [2021-08-06 14:55:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:24,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:25,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:25,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176534602] [2021-08-06 14:55:25,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176534602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:25,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633366613] [2021-08-06 14:55:25,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:55:25,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:25,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:25,260 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) [2021-08-06 14:55:25,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 14:55:29,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:55:29,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:55:29,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:30,033 INFO L354 Elim1Store]: treesize reduction 35, result has 36.4 percent of original size [2021-08-06 14:55:30,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 46 [2021-08-06 14:55:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:30,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633366613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:30,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:30,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-06 14:55:30,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66569808] [2021-08-06 14:55:30,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:55:30,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:55:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:55:30,528 INFO L87 Difference]: Start difference. First operand 1691 states and 5968 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:33,332 INFO L93 Difference]: Finished difference Result 2355 states and 8023 transitions. [2021-08-06 14:55:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 14:55:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:55:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:33,337 INFO L225 Difference]: With dead ends: 2355 [2021-08-06 14:55:33,337 INFO L226 Difference]: Without dead ends: 2346 [2021-08-06 14:55:33,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 2343.3ms TimeCoverageRelationStatistics Valid=471, Invalid=2951, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 14:55:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-08-06 14:55:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1690. [2021-08-06 14:55:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 3.5310834813499112) internal successors, (5964), 1689 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 5964 transitions. [2021-08-06 14:55:33,367 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 5964 transitions. Word has length 24 [2021-08-06 14:55:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:33,367 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 5964 transitions. [2021-08-06 14:55:33,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 5964 transitions. [2021-08-06 14:55:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:55:33,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:33,370 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:55:33,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-06 14:55:33,570 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,SelfDestructingSolverStorable148 [2021-08-06 14:55:33,570 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:55:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:33,570 INFO L82 PathProgramCache]: Analyzing trace with hash -775975208, now seen corresponding path program 43 times [2021-08-06 14:55:33,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:33,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341961514] [2021-08-06 14:55:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:33,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:33,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:33,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341961514] [2021-08-06 14:55:33,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341961514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:33,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337377842] [2021-08-06 14:55:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:55:33,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:33,885 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) [2021-08-06 14:55:33,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 14:55:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:38,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:55:38,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:38,982 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:55:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:55:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:39,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337377842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:39,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:39,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2021-08-06 14:55:39,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256316777] [2021-08-06 14:55:39,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:55:39,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:55:39,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:55:39,057 INFO L87 Difference]: Start difference. First operand 1690 states and 5964 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:40,141 INFO L93 Difference]: Finished difference Result 1999 states and 6871 transitions. [2021-08-06 14:55:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:55:40,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:55:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:40,145 INFO L225 Difference]: With dead ends: 1999 [2021-08-06 14:55:40,146 INFO L226 Difference]: Without dead ends: 1990 [2021-08-06 14:55:40,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 803.2ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:55:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-08-06 14:55:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1691. [2021-08-06 14:55:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.5313609467455622) internal successors, (5968), 1690 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5968 transitions. [2021-08-06 14:55:40,173 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5968 transitions. Word has length 24 [2021-08-06 14:55:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:40,173 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5968 transitions. [2021-08-06 14:55:40,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5968 transitions. [2021-08-06 14:55:40,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:55:40,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:40,176 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:55:40,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-06 14:55:40,376 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,SelfDestructingSolverStorable149 [2021-08-06 14:55:40,377 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:55:40,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1318232464, now seen corresponding path program 44 times [2021-08-06 14:55:40,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:40,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115281089] [2021-08-06 14:55:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:40,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:40,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:40,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115281089] [2021-08-06 14:55:40,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115281089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:40,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094166210] [2021-08-06 14:55:40,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:55:40,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:40,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:40,711 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) [2021-08-06 14:55:40,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 14:55:45,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:55:45,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:55:45,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:45,880 INFO L354 Elim1Store]: treesize reduction 35, result has 36.4 percent of original size [2021-08-06 14:55:45,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 47 [2021-08-06 14:55:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:46,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094166210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:46,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:46,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-06 14:55:46,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222862174] [2021-08-06 14:55:46,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:55:46,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:55:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:55:46,104 INFO L87 Difference]: Start difference. First operand 1691 states and 5968 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:48,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:48,473 INFO L93 Difference]: Finished difference Result 2207 states and 7522 transitions. [2021-08-06 14:55:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 14:55:48,473 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:55:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:48,478 INFO L225 Difference]: With dead ends: 2207 [2021-08-06 14:55:48,478 INFO L226 Difference]: Without dead ends: 2188 [2021-08-06 14:55:48,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1893.7ms TimeCoverageRelationStatistics Valid=436, Invalid=2114, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 14:55:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-08-06 14:55:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1694. [2021-08-06 14:55:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 3.531010041346722) internal successors, (5978), 1693 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5978 transitions. [2021-08-06 14:55:48,505 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5978 transitions. Word has length 24 [2021-08-06 14:55:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:48,505 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 5978 transitions. [2021-08-06 14:55:48,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5978 transitions. [2021-08-06 14:55:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:55:48,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:48,507 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:55:48,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-06 14:55:48,708 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,SelfDestructingSolverStorable150 [2021-08-06 14:55:48,708 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:55:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1189998572, now seen corresponding path program 45 times [2021-08-06 14:55:48,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:48,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768063061] [2021-08-06 14:55:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:48,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:49,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:49,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768063061] [2021-08-06 14:55:49,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768063061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:49,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002330978] [2021-08-06 14:55:49,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:55:49,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:49,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:49,154 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) [2021-08-06 14:55:49,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 14:55:53,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:55:53,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:55:53,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:54,521 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:55:54,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:55:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:54,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002330978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:54,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:54,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-06 14:55:54,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203339559] [2021-08-06 14:55:54,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:55:54,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:54,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:55:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:55:54,593 INFO L87 Difference]: Start difference. First operand 1694 states and 5978 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:56,532 INFO L93 Difference]: Finished difference Result 2140 states and 7317 transitions. [2021-08-06 14:55:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 14:55:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:55:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:56,536 INFO L225 Difference]: With dead ends: 2140 [2021-08-06 14:55:56,536 INFO L226 Difference]: Without dead ends: 2121 [2021-08-06 14:55:56,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1593.1ms TimeCoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 14:55:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-08-06 14:55:56,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1702. [2021-08-06 14:55:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 3.5343915343915344) internal successors, (6012), 1701 states have internal predecessors, (6012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:55:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 6012 transitions. [2021-08-06 14:55:56,564 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 6012 transitions. Word has length 24 [2021-08-06 14:55:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:56,564 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 6012 transitions. [2021-08-06 14:55:56,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:55:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 6012 transitions. [2021-08-06 14:55:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:55:56,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:56,567 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:55:56,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-06 14:55:56,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:56,767 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:55:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1218373036, now seen corresponding path program 46 times [2021-08-06 14:55:56,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:56,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153480072] [2021-08-06 14:55:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:56,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:57,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:57,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153480072] [2021-08-06 14:55:57,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153480072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:57,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401741541] [2021-08-06 14:55:57,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:55:57,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:57,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:57,144 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) [2021-08-06 14:55:57,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 14:56:01,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:56:01,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:56:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:02,209 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:56:02,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:56:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:02,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401741541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:02,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:02,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:56:02,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707073759] [2021-08-06 14:56:02,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:56:02,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:02,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:56:02,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:56:02,362 INFO L87 Difference]: Start difference. First operand 1702 states and 6012 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:56:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:03,056 INFO L93 Difference]: Finished difference Result 1900 states and 6628 transitions. [2021-08-06 14:56:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:56:03,056 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:56:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:03,060 INFO L225 Difference]: With dead ends: 1900 [2021-08-06 14:56:03,060 INFO L226 Difference]: Without dead ends: 1891 [2021-08-06 14:56:03,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 638.7ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:56:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-08-06 14:56:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1705. [2021-08-06 14:56:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.534037558685446) internal successors, (6022), 1704 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 6022 transitions. [2021-08-06 14:56:03,085 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 6022 transitions. Word has length 24 [2021-08-06 14:56:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:03,085 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 6022 transitions. [2021-08-06 14:56:03,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:56:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 6022 transitions. [2021-08-06 14:56:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:56:03,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:03,088 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:56:03,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 14:56:03,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:03,300 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:56:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:03,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2008305584, now seen corresponding path program 47 times [2021-08-06 14:56:03,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:03,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048454219] [2021-08-06 14:56:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:03,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:03,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:03,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048454219] [2021-08-06 14:56:03,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048454219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:03,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753126861] [2021-08-06 14:56:03,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:56:03,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:03,693 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) [2021-08-06 14:56:03,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 14:56:08,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:56:08,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:08,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:56:08,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:08,774 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:56:08,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:56:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:08,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753126861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:08,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:08,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:56:08,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784865713] [2021-08-06 14:56:08,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:56:08,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:56:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:56:08,914 INFO L87 Difference]: Start difference. First operand 1705 states and 6022 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:56:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:09,780 INFO L93 Difference]: Finished difference Result 1896 states and 6620 transitions. [2021-08-06 14:56:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:56:09,781 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:56:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:09,784 INFO L225 Difference]: With dead ends: 1896 [2021-08-06 14:56:09,785 INFO L226 Difference]: Without dead ends: 1885 [2021-08-06 14:56:09,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 654.2ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:56:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-08-06 14:56:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1700. [2021-08-06 14:56:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.535020600353149) internal successors, (6006), 1699 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 6006 transitions. [2021-08-06 14:56:09,809 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 6006 transitions. Word has length 24 [2021-08-06 14:56:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:09,809 INFO L470 AbstractCegarLoop]: Abstraction has 1700 states and 6006 transitions. [2021-08-06 14:56:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:56:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 6006 transitions. [2021-08-06 14:56:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:56:09,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:09,812 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:56:09,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-06 14:56:10,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:10,012 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:56:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1806820488, now seen corresponding path program 48 times [2021-08-06 14:56:10,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:10,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594530831] [2021-08-06 14:56:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:10,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:10,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:10,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594530831] [2021-08-06 14:56:10,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594530831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:10,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759924512] [2021-08-06 14:56:10,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:56:10,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:10,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:10,348 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) [2021-08-06 14:56:10,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 14:56:15,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:56:15,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:15,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:56:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:15,623 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:56:15,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:56:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:15,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759924512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:15,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:15,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2021-08-06 14:56:15,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508102233] [2021-08-06 14:56:15,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:56:15,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:56:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:56:15,696 INFO L87 Difference]: Start difference. First operand 1700 states and 6006 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:56:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:17,027 INFO L93 Difference]: Finished difference Result 2007 states and 6903 transitions. [2021-08-06 14:56:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:56:17,028 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:56:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:17,032 INFO L225 Difference]: With dead ends: 2007 [2021-08-06 14:56:17,032 INFO L226 Difference]: Without dead ends: 1998 [2021-08-06 14:56:17,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 863.9ms TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:56:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-08-06 14:56:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1701. [2021-08-06 14:56:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 3.5341176470588236) internal successors, (6008), 1700 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 6008 transitions. [2021-08-06 14:56:17,058 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 6008 transitions. Word has length 24 [2021-08-06 14:56:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:17,058 INFO L470 AbstractCegarLoop]: Abstraction has 1701 states and 6008 transitions. [2021-08-06 14:56:17,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:56:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 6008 transitions. [2021-08-06 14:56:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:56:17,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:17,061 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:56:17,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-06 14:56:17,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:17,262 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:56:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1168638300, now seen corresponding path program 49 times [2021-08-06 14:56:17,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:17,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802066991] [2021-08-06 14:56:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:17,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:17,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:17,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802066991] [2021-08-06 14:56:17,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802066991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:17,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296323178] [2021-08-06 14:56:17,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:56:17,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:17,679 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) [2021-08-06 14:56:17,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 14:56:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:56:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:22,969 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:56:22,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:56:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:23,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296323178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:23,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:23,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:56:23,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582274044] [2021-08-06 14:56:23,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:56:23,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:56:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:56:23,037 INFO L87 Difference]: Start difference. First operand 1701 states and 6008 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:56:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:24,799 INFO L93 Difference]: Finished difference Result 2118 states and 7282 transitions. [2021-08-06 14:56:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:56:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:56:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:24,803 INFO L225 Difference]: With dead ends: 2118 [2021-08-06 14:56:24,803 INFO L226 Difference]: Without dead ends: 2108 [2021-08-06 14:56:24,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1490.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 14:56:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-08-06 14:56:24,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1702. [2021-08-06 14:56:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 3.5332157554379777) internal successors, (6010), 1701 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 6010 transitions. [2021-08-06 14:56:24,826 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 6010 transitions. Word has length 24 [2021-08-06 14:56:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:24,826 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 6010 transitions. [2021-08-06 14:56:24,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:56:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 6010 transitions. [2021-08-06 14:56:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:56:24,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:24,829 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:56:24,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-06 14:56:25,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-06 14:56:25,029 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:56:25,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:25,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1190085484, now seen corresponding path program 50 times [2021-08-06 14:56:25,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:25,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421399944] [2021-08-06 14:56:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:25,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:25,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:25,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421399944] [2021-08-06 14:56:25,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421399944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:25,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110190553] [2021-08-06 14:56:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:56:25,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:25,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:25,426 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) [2021-08-06 14:56:25,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 14:56:30,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:56:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:30,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:56:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:30,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:56:30,815 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:56:30,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 54 [2021-08-06 14:56:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:31,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110190553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:31,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:31,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-06 14:56:31,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866811861] [2021-08-06 14:56:31,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:56:31,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:31,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:56:31,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:56:31,018 INFO L87 Difference]: Start difference. First operand 1702 states and 6010 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:56:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:33,097 INFO L93 Difference]: Finished difference Result 2261 states and 7713 transitions. [2021-08-06 14:56:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 14:56:33,098 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:56:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:33,102 INFO L225 Difference]: With dead ends: 2261 [2021-08-06 14:56:33,102 INFO L226 Difference]: Without dead ends: 2242 [2021-08-06 14:56:33,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1706.5ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 14:56:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-08-06 14:56:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1709. [2021-08-06 14:56:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.531030444964871) internal successors, (6031), 1708 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 6031 transitions. [2021-08-06 14:56:33,128 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 6031 transitions. Word has length 24 [2021-08-06 14:56:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:33,128 INFO L470 AbstractCegarLoop]: Abstraction has 1709 states and 6031 transitions. [2021-08-06 14:56:33,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:56:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 6031 transitions. [2021-08-06 14:56:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:56:33,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:33,131 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:56:33,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-06 14:56:33,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:33,331 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:56:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:33,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1994148372, now seen corresponding path program 51 times [2021-08-06 14:56:33,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:33,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914845281] [2021-08-06 14:56:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:33,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:33,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:33,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914845281] [2021-08-06 14:56:33,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914845281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:33,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61014220] [2021-08-06 14:56:33,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:56:33,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:33,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:33,760 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) [2021-08-06 14:56:33,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 14:56:38,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:56:38,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 14:56:38,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:39,044 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-08-06 14:56:39,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 57 [2021-08-06 14:56:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:40,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61014220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:40,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:40,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-08-06 14:56:40,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314141242] [2021-08-06 14:56:40,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:56:40,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:40,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:56:40,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:56:40,045 INFO L87 Difference]: Start difference. First operand 1709 states and 6031 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:42,112 INFO L93 Difference]: Finished difference Result 1941 states and 6694 transitions. [2021-08-06 14:56:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:56:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:56:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:42,117 INFO L225 Difference]: With dead ends: 1941 [2021-08-06 14:56:42,117 INFO L226 Difference]: Without dead ends: 1932 [2021-08-06 14:56:42,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1931.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 14:56:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-08-06 14:56:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1714. [2021-08-06 14:56:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.531231757151197) internal successors, (6049), 1713 states have internal predecessors, (6049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 6049 transitions. [2021-08-06 14:56:42,139 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 6049 transitions. Word has length 24 [2021-08-06 14:56:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:42,139 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 6049 transitions. [2021-08-06 14:56:42,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 6049 transitions. [2021-08-06 14:56:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:56:42,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:42,145 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:56:42,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-06 14:56:42,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 14:56:42,361 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:56:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:42,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1715528420, now seen corresponding path program 52 times [2021-08-06 14:56:42,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:42,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755522616] [2021-08-06 14:56:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:42,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:42,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:42,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755522616] [2021-08-06 14:56:42,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755522616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:42,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627387008] [2021-08-06 14:56:42,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:56:42,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:42,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:42,695 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) [2021-08-06 14:56:42,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 14:56:47,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:56:47,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:47,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:56:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:47,999 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:56:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 28 [2021-08-06 14:56:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:48,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627387008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:48,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:48,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-06 14:56:48,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311386830] [2021-08-06 14:56:48,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:56:48,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:56:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:56:48,128 INFO L87 Difference]: Start difference. First operand 1714 states and 6049 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:49,115 INFO L93 Difference]: Finished difference Result 1895 states and 6599 transitions. [2021-08-06 14:56:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:56:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:56:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:49,119 INFO L225 Difference]: With dead ends: 1895 [2021-08-06 14:56:49,119 INFO L226 Difference]: Without dead ends: 1885 [2021-08-06 14:56:49,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 705.6ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:56:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-08-06 14:56:49,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1708. [2021-08-06 14:56:49,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.531927357937903) internal successors, (6029), 1707 states have internal predecessors, (6029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 6029 transitions. [2021-08-06 14:56:49,145 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 6029 transitions. Word has length 24 [2021-08-06 14:56:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:49,145 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 6029 transitions. [2021-08-06 14:56:49,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 6029 transitions. [2021-08-06 14:56:49,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:56:49,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:49,148 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:56:49,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-06 14:56:49,348 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,SelfDestructingSolverStorable158 [2021-08-06 14:56:49,349 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:56:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:49,349 INFO L82 PathProgramCache]: Analyzing trace with hash 678961326, now seen corresponding path program 53 times [2021-08-06 14:56:49,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:49,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213413185] [2021-08-06 14:56:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:49,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:49,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:49,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213413185] [2021-08-06 14:56:49,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213413185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:49,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97909703] [2021-08-06 14:56:49,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:56:49,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:49,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:49,803 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) [2021-08-06 14:56:49,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 14:56:54,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:56:54,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:56:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:55,135 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:56:55,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 28 [2021-08-06 14:56:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:55,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97909703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:55,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:55,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:56:55,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003423053] [2021-08-06 14:56:55,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:56:55,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:55,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:56:55,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:56:55,288 INFO L87 Difference]: Start difference. First operand 1708 states and 6029 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:56:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:56,884 INFO L93 Difference]: Finished difference Result 2028 states and 6970 transitions. [2021-08-06 14:56:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:56:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:56:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:56,889 INFO L225 Difference]: With dead ends: 2028 [2021-08-06 14:56:56,889 INFO L226 Difference]: Without dead ends: 2019 [2021-08-06 14:56:56,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1264.0ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:56:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-08-06 14:56:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1721. [2021-08-06 14:56:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.5343023255813955) internal successors, (6079), 1720 states have internal predecessors, (6079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:56:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 6079 transitions. [2021-08-06 14:56:56,914 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 6079 transitions. Word has length 24 [2021-08-06 14:56:56,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:56,914 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 6079 transitions. [2021-08-06 14:56:56,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:56:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 6079 transitions. [2021-08-06 14:56:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:56:56,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:56,916 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:56:56,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-06 14:56:57,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:57,117 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:56:57,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:57,117 INFO L82 PathProgramCache]: Analyzing trace with hash 830300892, now seen corresponding path program 54 times [2021-08-06 14:56:57,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:57,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72864633] [2021-08-06 14:56:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:57,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:57,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:57,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72864633] [2021-08-06 14:56:57,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72864633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:57,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442560255] [2021-08-06 14:56:57,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:56:57,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:57,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:57,475 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) [2021-08-06 14:56:57,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 14:57:02,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:57:02,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:02,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:57:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:03,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:57:03,159 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:57:03,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-08-06 14:57:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442560255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:03,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:03,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-08-06 14:57:03,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276664333] [2021-08-06 14:57:03,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:57:03,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:57:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:57:03,363 INFO L87 Difference]: Start difference. First operand 1721 states and 6079 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:04,680 INFO L93 Difference]: Finished difference Result 2143 states and 7311 transitions. [2021-08-06 14:57:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:57:04,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:57:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:04,684 INFO L225 Difference]: With dead ends: 2143 [2021-08-06 14:57:04,684 INFO L226 Difference]: Without dead ends: 2116 [2021-08-06 14:57:04,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1150.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:57:04,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-08-06 14:57:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1725. [2021-08-06 14:57:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 3.5342227378190256) internal successors, (6093), 1724 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 6093 transitions. [2021-08-06 14:57:04,709 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 6093 transitions. Word has length 24 [2021-08-06 14:57:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:04,709 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 6093 transitions. [2021-08-06 14:57:04,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 6093 transitions. [2021-08-06 14:57:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:57:04,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:04,712 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:04,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-06 14:57:04,912 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,SelfDestructingSolverStorable160 [2021-08-06 14:57:04,912 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:57:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash 958534784, now seen corresponding path program 55 times [2021-08-06 14:57:04,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:04,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378005391] [2021-08-06 14:57:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:04,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:05,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:05,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378005391] [2021-08-06 14:57:05,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378005391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:05,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376451508] [2021-08-06 14:57:05,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:57:05,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:05,300 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) [2021-08-06 14:57:05,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 14:57:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:10,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:57:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:10,878 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:57:10,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:57:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:10,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376451508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:10,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:10,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:57:10,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289606253] [2021-08-06 14:57:10,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:57:10,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:57:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:57:10,947 INFO L87 Difference]: Start difference. First operand 1725 states and 6093 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:57:12,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:12,401 INFO L93 Difference]: Finished difference Result 2092 states and 7195 transitions. [2021-08-06 14:57:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:57:12,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:57:12,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:12,406 INFO L225 Difference]: With dead ends: 2092 [2021-08-06 14:57:12,406 INFO L226 Difference]: Without dead ends: 2073 [2021-08-06 14:57:12,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1109.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:57:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-08-06 14:57:12,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1726. [2021-08-06 14:57:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 3.5344927536231885) internal successors, (6097), 1725 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 6097 transitions. [2021-08-06 14:57:12,431 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 6097 transitions. Word has length 24 [2021-08-06 14:57:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:12,431 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 6097 transitions. [2021-08-06 14:57:12,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:57:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 6097 transitions. [2021-08-06 14:57:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:57:12,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:12,434 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:12,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-06 14:57:12,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:12,635 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:57:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:12,635 INFO L82 PathProgramCache]: Analyzing trace with hash -928060904, now seen corresponding path program 56 times [2021-08-06 14:57:12,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:12,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995891242] [2021-08-06 14:57:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:12,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:13,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:13,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995891242] [2021-08-06 14:57:13,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995891242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:13,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648146327] [2021-08-06 14:57:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:57:13,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:13,078 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) [2021-08-06 14:57:13,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 14:57:18,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:57:18,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:18,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:57:18,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:18,564 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-08-06 14:57:18,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 48 [2021-08-06 14:57:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:19,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648146327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:19,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:19,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-06 14:57:19,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516581756] [2021-08-06 14:57:19,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:57:19,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:19,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:57:19,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:57:19,087 INFO L87 Difference]: Start difference. First operand 1726 states and 6097 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:57:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:20,297 INFO L93 Difference]: Finished difference Result 1956 states and 6807 transitions. [2021-08-06 14:57:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:57:20,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:57:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:20,301 INFO L225 Difference]: With dead ends: 1956 [2021-08-06 14:57:20,301 INFO L226 Difference]: Without dead ends: 1947 [2021-08-06 14:57:20,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1164.3ms TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:57:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-08-06 14:57:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1729. [2021-08-06 14:57:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 3.5341435185185186) internal successors, (6107), 1728 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 6107 transitions. [2021-08-06 14:57:20,329 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 6107 transitions. Word has length 24 [2021-08-06 14:57:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:20,329 INFO L470 AbstractCegarLoop]: Abstraction has 1729 states and 6107 transitions. [2021-08-06 14:57:20,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:57:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 6107 transitions. [2021-08-06 14:57:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:57:20,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:20,332 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:20,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-06 14:57:20,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:20,533 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:57:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 140227772, now seen corresponding path program 57 times [2021-08-06 14:57:20,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:20,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273396051] [2021-08-06 14:57:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:20,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:20,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:20,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273396051] [2021-08-06 14:57:20,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273396051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:20,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993025500] [2021-08-06 14:57:20,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:57:20,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:20,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:20,949 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) [2021-08-06 14:57:20,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 14:57:26,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:57:26,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:26,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:57:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:26,675 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 14:57:26,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 14:57:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:26,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993025500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:26,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:26,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-06 14:57:26,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750637173] [2021-08-06 14:57:26,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:57:26,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:57:26,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:57:26,814 INFO L87 Difference]: Start difference. First operand 1729 states and 6107 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:57:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:27,492 INFO L93 Difference]: Finished difference Result 1925 states and 6703 transitions. [2021-08-06 14:57:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:57:27,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:57:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:27,496 INFO L225 Difference]: With dead ends: 1925 [2021-08-06 14:57:27,496 INFO L226 Difference]: Without dead ends: 1915 [2021-08-06 14:57:27,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 660.4ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:57:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-08-06 14:57:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1727. [2021-08-06 14:57:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 3.5347624565469293) internal successors, (6101), 1726 states have internal predecessors, (6101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 6101 transitions. [2021-08-06 14:57:27,519 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 6101 transitions. Word has length 24 [2021-08-06 14:57:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:27,519 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 6101 transitions. [2021-08-06 14:57:27,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:57:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 6101 transitions. [2021-08-06 14:57:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:57:27,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:27,522 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:27,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-06 14:57:27,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:27,722 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:57:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2119722970, now seen corresponding path program 58 times [2021-08-06 14:57:27,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:27,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485944189] [2021-08-06 14:57:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:27,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:28,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:28,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485944189] [2021-08-06 14:57:28,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485944189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:28,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920844829] [2021-08-06 14:57:28,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:57:28,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:28,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:28,142 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) [2021-08-06 14:57:28,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 14:57:33,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:57:33,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:33,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:57:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:33,753 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:57:33,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:57:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:33,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920844829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:33,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:33,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:57:33,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121083309] [2021-08-06 14:57:33,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:57:33,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:33,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:57:33,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:57:33,895 INFO L87 Difference]: Start difference. First operand 1727 states and 6101 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:57:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:34,890 INFO L93 Difference]: Finished difference Result 1938 states and 6758 transitions. [2021-08-06 14:57:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:57:34,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:57:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:34,895 INFO L225 Difference]: With dead ends: 1938 [2021-08-06 14:57:34,895 INFO L226 Difference]: Without dead ends: 1927 [2021-08-06 14:57:34,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 806.2ms TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:57:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-08-06 14:57:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1734. [2021-08-06 14:57:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.537795729948067) internal successors, (6131), 1733 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 6131 transitions. [2021-08-06 14:57:34,923 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 6131 transitions. Word has length 24 [2021-08-06 14:57:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:34,923 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 6131 transitions. [2021-08-06 14:57:34,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:57:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 6131 transitions. [2021-08-06 14:57:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:57:34,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:34,926 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:34,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-06 14:57:35,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:35,127 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:57:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:35,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1441687764, now seen corresponding path program 59 times [2021-08-06 14:57:35,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:35,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238933451] [2021-08-06 14:57:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:35,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:35,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:35,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238933451] [2021-08-06 14:57:35,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238933451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:35,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162271425] [2021-08-06 14:57:35,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:57:35,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:35,486 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) [2021-08-06 14:57:35,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 14:57:40,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:57:40,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:40,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:57:40,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:41,310 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:57:41,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 29 [2021-08-06 14:57:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:41,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162271425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:41,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:41,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:57:41,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864777152] [2021-08-06 14:57:41,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:57:41,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:57:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:57:41,380 INFO L87 Difference]: Start difference. First operand 1734 states and 6131 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:57:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:43,002 INFO L93 Difference]: Finished difference Result 2146 states and 7383 transitions. [2021-08-06 14:57:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:57:43,002 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:57:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:43,006 INFO L225 Difference]: With dead ends: 2146 [2021-08-06 14:57:43,006 INFO L226 Difference]: Without dead ends: 2136 [2021-08-06 14:57:43,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1296.9ms TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:57:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-08-06 14:57:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1735. [2021-08-06 14:57:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 3.538062283737024) internal successors, (6135), 1734 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 6135 transitions. [2021-08-06 14:57:43,030 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 6135 transitions. Word has length 24 [2021-08-06 14:57:43,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:43,031 INFO L470 AbstractCegarLoop]: Abstraction has 1735 states and 6135 transitions. [2021-08-06 14:57:43,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:57:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 6135 transitions. [2021-08-06 14:57:43,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:57:43,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:43,033 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:43,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-06 14:57:43,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:43,234 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:57:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1468783016, now seen corresponding path program 60 times [2021-08-06 14:57:43,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:43,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942154464] [2021-08-06 14:57:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:43,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:43,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:43,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942154464] [2021-08-06 14:57:43,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942154464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:43,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469252029] [2021-08-06 14:57:43,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:57:43,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:43,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:43,628 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) [2021-08-06 14:57:43,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 14:57:48,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:57:48,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:48,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:57:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:49,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:57:49,406 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-06 14:57:49,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 46 [2021-08-06 14:57:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:49,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469252029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:49,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:49,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 14:57:49,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427198134] [2021-08-06 14:57:49,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:57:49,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:49,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:57:49,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:57:49,564 INFO L87 Difference]: Start difference. First operand 1735 states and 6135 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:57:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:51,132 INFO L93 Difference]: Finished difference Result 2229 states and 7631 transitions. [2021-08-06 14:57:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:57:51,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:57:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:51,137 INFO L225 Difference]: With dead ends: 2229 [2021-08-06 14:57:51,137 INFO L226 Difference]: Without dead ends: 2210 [2021-08-06 14:57:51,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1248.8ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 14:57:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-08-06 14:57:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1735. [2021-08-06 14:57:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 3.538062283737024) internal successors, (6135), 1734 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 6135 transitions. [2021-08-06 14:57:51,161 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 6135 transitions. Word has length 24 [2021-08-06 14:57:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:51,161 INFO L470 AbstractCegarLoop]: Abstraction has 1735 states and 6135 transitions. [2021-08-06 14:57:51,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2021-08-06 14:57:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 6135 transitions. [2021-08-06 14:57:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:57:51,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:51,164 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:51,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-06 14:57:51,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:51,364 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:57:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1745778016, now seen corresponding path program 61 times [2021-08-06 14:57:51,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:51,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246029269] [2021-08-06 14:57:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:51,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:51,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:51,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246029269] [2021-08-06 14:57:51,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246029269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:51,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56289530] [2021-08-06 14:57:51,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:57:51,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:51,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:51,805 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) [2021-08-06 14:57:51,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 14:57:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:57,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:57:57,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:57,531 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:57:57,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 28 [2021-08-06 14:57:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:57,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56289530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:57,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:57,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:57:57,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276820266] [2021-08-06 14:57:57,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:57:57,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:57:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:57:57,679 INFO L87 Difference]: Start difference. First operand 1735 states and 6135 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:57:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:59,754 INFO L93 Difference]: Finished difference Result 2051 states and 7089 transitions. [2021-08-06 14:57:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 14:57:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:57:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:59,759 INFO L225 Difference]: With dead ends: 2051 [2021-08-06 14:57:59,759 INFO L226 Difference]: Without dead ends: 2042 [2021-08-06 14:57:59,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1722.6ms TimeCoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 14:57:59,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-08-06 14:57:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1739. [2021-08-06 14:57:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1738 states have (on average 3.537974683544304) internal successors, (6149), 1738 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 6149 transitions. [2021-08-06 14:57:59,785 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 6149 transitions. Word has length 24 [2021-08-06 14:57:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:59,785 INFO L470 AbstractCegarLoop]: Abstraction has 1739 states and 6149 transitions. [2021-08-06 14:57:59,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:57:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 6149 transitions. [2021-08-06 14:57:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:57:59,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:59,788 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:59,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-06 14:57:59,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-06 14:57:59,989 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:57:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1715450840, now seen corresponding path program 62 times [2021-08-06 14:57:59,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:59,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172178658] [2021-08-06 14:57:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:59,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:00,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:00,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172178658] [2021-08-06 14:58:00,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172178658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:00,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046190568] [2021-08-06 14:58:00,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:58:00,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:00,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:00,356 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) [2021-08-06 14:58:00,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 14:58:05,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:58:05,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:05,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:58:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:06,200 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-08-06 14:58:06,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 49 [2021-08-06 14:58:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:06,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046190568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:06,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:06,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-06 14:58:06,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472576376] [2021-08-06 14:58:06,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:58:06,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:58:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:58:06,682 INFO L87 Difference]: Start difference. First operand 1739 states and 6149 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:58:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:08,072 INFO L93 Difference]: Finished difference Result 1971 states and 6815 transitions. [2021-08-06 14:58:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:58:08,072 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:58:08,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:08,076 INFO L225 Difference]: With dead ends: 1971 [2021-08-06 14:58:08,076 INFO L226 Difference]: Without dead ends: 1953 [2021-08-06 14:58:08,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1072.4ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:58:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-08-06 14:58:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1739. [2021-08-06 14:58:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1738 states have (on average 3.535097813578826) internal successors, (6144), 1738 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 6144 transitions. [2021-08-06 14:58:08,099 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 6144 transitions. Word has length 24 [2021-08-06 14:58:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:08,099 INFO L470 AbstractCegarLoop]: Abstraction has 1739 states and 6144 transitions. [2021-08-06 14:58:08,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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) [2021-08-06 14:58:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 6144 transitions. [2021-08-06 14:58:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:58:08,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:08,102 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:08,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-06 14:58:08,302 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,SelfDestructingSolverStorable168 [2021-08-06 14:58:08,302 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:58:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash -94544808, now seen corresponding path program 63 times [2021-08-06 14:58:08,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:08,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381417962] [2021-08-06 14:58:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:08,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:08,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:08,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381417962] [2021-08-06 14:58:08,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381417962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:08,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346242852] [2021-08-06 14:58:08,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:58:08,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:08,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:08,682 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) [2021-08-06 14:58:08,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 14:58:14,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:58:14,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:58:14,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:58:15,025 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-08-06 14:58:15,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 60 [2021-08-06 14:58:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:15,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346242852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:15,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:15,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-08-06 14:58:15,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112072211] [2021-08-06 14:58:15,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:58:15,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:15,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:58:15,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:58:15,278 INFO L87 Difference]: Start difference. First operand 1739 states and 6144 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:16,418 INFO L93 Difference]: Finished difference Result 2114 states and 7247 transitions. [2021-08-06 14:58:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:58:16,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:58:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:16,422 INFO L225 Difference]: With dead ends: 2114 [2021-08-06 14:58:16,422 INFO L226 Difference]: Without dead ends: 2087 [2021-08-06 14:58:16,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 917.7ms TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:58:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-08-06 14:58:16,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1746. [2021-08-06 14:58:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.5369627507163326) internal successors, (6172), 1745 states have internal predecessors, (6172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 6172 transitions. [2021-08-06 14:58:16,447 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 6172 transitions. Word has length 24 [2021-08-06 14:58:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:16,447 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 6172 transitions. [2021-08-06 14:58:16,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 6172 transitions. [2021-08-06 14:58:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:58:16,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:16,450 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:16,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 14:58:16,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-06 14:58:16,651 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:58:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1981140496, now seen corresponding path program 64 times [2021-08-06 14:58:16,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:16,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080623048] [2021-08-06 14:58:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:16,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:17,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:17,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080623048] [2021-08-06 14:58:17,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080623048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:17,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447668959] [2021-08-06 14:58:17,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:58:17,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:17,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:17,067 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) [2021-08-06 14:58:17,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 14:58:22,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:58:22,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:22,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:58:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:22,931 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:58:22,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:58:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:23,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447668959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:23,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:23,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:58:23,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259860958] [2021-08-06 14:58:23,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:58:23,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:23,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:58:23,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:58:23,067 INFO L87 Difference]: Start difference. First operand 1746 states and 6172 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:58:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:24,040 INFO L93 Difference]: Finished difference Result 1966 states and 6854 transitions. [2021-08-06 14:58:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:58:24,041 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:58:24,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:24,045 INFO L225 Difference]: With dead ends: 1966 [2021-08-06 14:58:24,045 INFO L226 Difference]: Without dead ends: 1957 [2021-08-06 14:58:24,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 962.9ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:58:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-08-06 14:58:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1752. [2021-08-06 14:58:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.540833809251856) internal successors, (6200), 1751 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 6200 transitions. [2021-08-06 14:58:24,068 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 6200 transitions. Word has length 24 [2021-08-06 14:58:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:24,068 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 6200 transitions. [2021-08-06 14:58:24,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:58:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 6200 transitions. [2021-08-06 14:58:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:58:24,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:24,071 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:24,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-06 14:58:24,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:24,273 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:58:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash -912851820, now seen corresponding path program 65 times [2021-08-06 14:58:24,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:24,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416524628] [2021-08-06 14:58:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:24,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:24,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:24,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416524628] [2021-08-06 14:58:24,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416524628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:24,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813351129] [2021-08-06 14:58:24,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:58:24,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:24,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:24,688 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) [2021-08-06 14:58:24,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 14:58:30,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:58:30,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:58:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:30,627 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 14:58:30,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 28 [2021-08-06 14:58:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:30,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813351129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:30,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:30,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 14:58:30,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472212299] [2021-08-06 14:58:30,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:58:30,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:58:30,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:58:30,762 INFO L87 Difference]: Start difference. First operand 1752 states and 6200 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:58:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:31,765 INFO L93 Difference]: Finished difference Result 1949 states and 6820 transitions. [2021-08-06 14:58:31,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:58:31,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:58:31,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:31,769 INFO L225 Difference]: With dead ends: 1949 [2021-08-06 14:58:31,769 INFO L226 Difference]: Without dead ends: 1938 [2021-08-06 14:58:31,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 897.3ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:58:31,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-08-06 14:58:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1752. [2021-08-06 14:58:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.540833809251856) internal successors, (6200), 1751 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 6200 transitions. [2021-08-06 14:58:31,793 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 6200 transitions. Word has length 24 [2021-08-06 14:58:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:31,793 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 6200 transitions. [2021-08-06 14:58:31,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2021-08-06 14:58:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 6200 transitions. [2021-08-06 14:58:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:58:31,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:31,796 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:31,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:31,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:31,996 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION] === [2021-08-06 14:58:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:31,996 INFO L82 PathProgramCache]: Analyzing trace with hash 524901896, now seen corresponding path program 66 times [2021-08-06 14:58:31,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:31,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495673678] [2021-08-06 14:58:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:31,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:32,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:32,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495673678] [2021-08-06 14:58:32,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495673678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:32,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739423293] [2021-08-06 14:58:32,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:58:32,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:32,458 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) [2021-08-06 14:58:32,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 14:58:35,209 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 [2021-08-06 14:58:35,212 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:58:36,233 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:58:36,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-08-06 14:58:36,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-06 14:58:36,434 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,SelfDestructingSolverStorable172 [2021-08-06 14:58:36,434 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while executing Executor. [2021-08-06 14:58:36,434 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 14:58:36,434 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-06 14:58:36,434 INFO L308 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT,TIMEOUT,TIMEOUT (2/2) [2021-08-06 14:58:36,435 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:58:36,435 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:58:36,437 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:58:36 BasicIcfg [2021-08-06 14:58:36,437 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:58:36,437 INFO L168 Benchmark]: Toolchain (without parser) took 704266.31 ms. Allocated memory was 177.2 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 158.2 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 965.3 MB. Max. memory is 8.0 GB. [2021-08-06 14:58:36,437 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 177.2 MB. Free memory is still 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:58:36,438 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 177.2 MB. Free memory was 158.1 MB in the beginning and 156.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 14:58:36,438 INFO L168 Benchmark]: Boogie Preprocessor took 18.83 ms. Allocated memory is still 177.2 MB. Free memory was 156.5 MB in the beginning and 155.6 MB in the end (delta: 906.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:58:36,438 INFO L168 Benchmark]: RCFGBuilder took 332.33 ms. Allocated memory is still 177.2 MB. Free memory was 155.5 MB in the beginning and 139.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-08-06 14:58:36,438 INFO L168 Benchmark]: TraceAbstraction took 703882.49 ms. Allocated memory was 177.2 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 139.1 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 946.5 MB. Max. memory is 8.0 GB. [2021-08-06 14:58:36,438 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 0.12 ms. Allocated memory is still 177.2 MB. Free memory is still 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 177.2 MB. Free memory was 158.1 MB in the beginning and 156.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.83 ms. Allocated memory is still 177.2 MB. Free memory was 156.5 MB in the beginning and 155.6 MB in the end (delta: 906.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 332.33 ms. Allocated memory is still 177.2 MB. Free memory was 155.5 MB in the beginning and 139.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 703882.49 ms. Allocated memory was 177.2 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 139.1 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 946.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1Thread1of1ForFork0 with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 38.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 6.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 703735.0ms, OverallIterations: 173, TraceHistogramMax: 2, EmptinessCheckTime: 310.6ms, AutomataDifference: 167905.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11683 SDtfs, 26407 SDslu, 93577 SDs, 0 SdLazy, 126678 SolverSat, 9050 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61378.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7872 GetRequests, 2612 SyntacticMatches, 244 SemanticMatches, 5016 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41927 ImplicationChecksByTransitivity, 128580.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1752occurred in iteration=171, InterpolantAutomatonStates: 4225, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2906.7ms AutomataMinimizationTime, 172 MinimizatonAttempts, 56304 StatesRemovedByMinimization, 171 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 744.7ms SsaConstructionTime, 2430.0ms SatisfiabilityAnalysisTime, 123387.9ms InterpolantComputationTime, 7428 NumberOfCodeBlocks, 7428 NumberOfCodeBlocksAsserted, 502 NumberOfCheckSat, 7096 ConstructedInterpolants, 754 QuantifiedInterpolants, 107403 SizeOfPredicates, 1117 NumberOfNonLiveVariables, 12628 ConjunctsInSsa, 3995 ConjunctsInUnsatCore, 332 InterpolantComputations, 12 PerfectInterpolantSequences, 169/1626 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