/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:00:43,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:00:43,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:00:43,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:00:43,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:00:43,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:00:43,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:00:43,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:00:43,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:00:43,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:00:43,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:00:43,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:00:43,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:00:43,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:00:43,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:00:43,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:00:43,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:00:43,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:00:43,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:00:43,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:00:43,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:00:43,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:00:43,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:00:43,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:00:43,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:00:43,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:00:43,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:00:43,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:00:43,493 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-Delay.epf [2021-08-21 18:00:43,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:00:43,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:00:43,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:00:43,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:00:43,540 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:00:43,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:00:43,541 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:00:43,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:00:43,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:00:43,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:00:43,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:00:43,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:00:43,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:00:43,542 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:00:43,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:00:43,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:00:43,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:00:43,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:00:43,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:00:43,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:00:43,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:00:43,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:00:43,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:00:43,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:00:43,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:00:43,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:00:43,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:00:43,544 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:00:43,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:00:43,544 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:00:43,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:00:43,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:00:43,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:00:43,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:00:43,837 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:00:43,838 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:00:43,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2021-08-21 18:00:43,839 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-08-21 18:00:43,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:00:43,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:00:43,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:00:43,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:00:43,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:00:43,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:00:43,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:00:43,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:00:43,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:00:43,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:00:43,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:00:43,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:00:43,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:00:43,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/1) ... [2021-08-21 18:00:43,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:00:43,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:43,936 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) [2021-08-21 18:00:43,939 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 [2021-08-21 18:00:43,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:00:43,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:00:43,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:00:43,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:00:43,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:00:43,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:00:43,968 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:00:43,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:00:43,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:00:43,968 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:00:43,968 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:00:43,968 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:00:43,969 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 18:00:43,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 18:00:43,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 18:00:43,971 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:00:44,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:00:44,167 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:00:44,169 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:00:44 BoogieIcfgContainer [2021-08-21 18:00:44,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:00:44,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:00:44,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:00:44,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:00:44,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:00:43" (1/2) ... [2021-08-21 18:00:44,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8e7027 and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:00:44, skipping insertion in model container [2021-08-21 18:00:44,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:00:44" (2/2) ... [2021-08-21 18:00:44,174 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-08-21 18:00:44,177 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:00:44,178 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:00:44,178 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:00:44,178 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:00:44,230 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 18:00:44,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:00:44,272 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 [2021-08-21 18:00:44,272 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 18:00:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 435 states, 302 states have (on average 1.8079470198675496) internal successors, (546), 434 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:00:44,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:44,430 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, 1, 1, 1, 1, 1] [2021-08-21 18:00:44,431 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:44,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1036730373, now seen corresponding path program 1 times [2021-08-21 18:00:44,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:44,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591800818] [2021-08-21 18:00:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:44,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:44,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:44,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591800818] [2021-08-21 18:00:44,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591800818] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:00:44,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:00:44,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:00:44,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408870877] [2021-08-21 18:00:44,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:00:44,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:44,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:00:44,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:00:44,636 INFO L87 Difference]: Start difference. First operand has 435 states, 302 states have (on average 1.8079470198675496) internal successors, (546), 434 states have internal predecessors, (546), 0 states have call successors, (0), 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 6.25) internal successors, (25), 4 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) [2021-08-21 18:00:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:44,713 INFO L93 Difference]: Finished difference Result 1267 states and 1510 transitions. [2021-08-21 18:00:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:00:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 25 [2021-08-21 18:00:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:44,724 INFO L225 Difference]: With dead ends: 1267 [2021-08-21 18:00:44,724 INFO L226 Difference]: Without dead ends: 134 [2021-08-21 18:00:44,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:00:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-21 18:00:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2021-08-21 18:00:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.6788990825688073) internal successors, (183), 109 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 183 transitions. [2021-08-21 18:00:44,772 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 183 transitions. Word has length 25 [2021-08-21 18:00:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:44,772 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 183 transitions. [2021-08-21 18:00:44,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-08-21 18:00:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 183 transitions. [2021-08-21 18:00:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:00:44,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:44,778 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:44,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:00:44,778 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash 918966983, now seen corresponding path program 1 times [2021-08-21 18:00:44,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:44,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673461196] [2021-08-21 18:00:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:44,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:44,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:44,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673461196] [2021-08-21 18:00:44,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673461196] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:00:44,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:00:44,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:00:44,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517978655] [2021-08-21 18:00:44,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:00:44,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:44,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:00:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:00:44,859 INFO L87 Difference]: Start difference. First operand 110 states and 183 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-08-21 18:00:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:44,916 INFO L93 Difference]: Finished difference Result 131 states and 210 transitions. [2021-08-21 18:00:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:00:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 27 [2021-08-21 18:00:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:44,920 INFO L225 Difference]: With dead ends: 131 [2021-08-21 18:00:44,920 INFO L226 Difference]: Without dead ends: 131 [2021-08-21 18:00:44,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:00:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-21 18:00:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2021-08-21 18:00:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.6697247706422018) internal successors, (182), 109 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 182 transitions. [2021-08-21 18:00:44,934 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 182 transitions. Word has length 27 [2021-08-21 18:00:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:44,935 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 182 transitions. [2021-08-21 18:00:44,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-08-21 18:00:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 182 transitions. [2021-08-21 18:00:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:00:44,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:44,938 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:44,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:00:44,939 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:44,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1532760519, now seen corresponding path program 1 times [2021-08-21 18:00:44,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:44,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784897519] [2021-08-21 18:00:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:44,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:45,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:45,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784897519] [2021-08-21 18:00:45,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784897519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:45,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543298367] [2021-08-21 18:00:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:45,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:45,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:45,091 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) [2021-08-21 18:00:45,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:00:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:00:45,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:45,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543298367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:45,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:45,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 18:00:45,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270528412] [2021-08-21 18:00:45,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:00:45,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:00:45,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:00:45,411 INFO L87 Difference]: Start difference. First operand 110 states and 182 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:45,503 INFO L93 Difference]: Finished difference Result 174 states and 291 transitions. [2021-08-21 18:00:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:00:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:00:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:45,505 INFO L225 Difference]: With dead ends: 174 [2021-08-21 18:00:45,505 INFO L226 Difference]: Without dead ends: 174 [2021-08-21 18:00:45,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:00:45,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-21 18:00:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 132. [2021-08-21 18:00:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.7404580152671756) internal successors, (228), 131 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 228 transitions. [2021-08-21 18:00:45,511 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 228 transitions. Word has length 27 [2021-08-21 18:00:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:45,512 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 228 transitions. [2021-08-21 18:00:45,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 228 transitions. [2021-08-21 18:00:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:00:45,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:45,513 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:45,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 18:00:45,729 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 [2021-08-21 18:00:45,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:45,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1374707001, now seen corresponding path program 2 times [2021-08-21 18:00:45,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:45,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558671210] [2021-08-21 18:00:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:45,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:45,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:45,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558671210] [2021-08-21 18:00:45,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558671210] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:00:45,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:00:45,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:00:45,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781045685] [2021-08-21 18:00:45,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:00:45,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:00:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:00:45,766 INFO L87 Difference]: Start difference. First operand 132 states and 228 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-08-21 18:00:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:45,799 INFO L93 Difference]: Finished difference Result 121 states and 207 transitions. [2021-08-21 18:00:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:00:45,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 27 [2021-08-21 18:00:45,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:45,800 INFO L225 Difference]: With dead ends: 121 [2021-08-21 18:00:45,800 INFO L226 Difference]: Without dead ends: 117 [2021-08-21 18:00:45,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:00:45,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-21 18:00:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-08-21 18:00:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.7565217391304349) internal successors, (202), 115 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 202 transitions. [2021-08-21 18:00:45,809 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 202 transitions. Word has length 27 [2021-08-21 18:00:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:45,810 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 202 transitions. [2021-08-21 18:00:45,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-08-21 18:00:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 202 transitions. [2021-08-21 18:00:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:00:45,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:45,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:45,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:00:45,812 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1169464201, now seen corresponding path program 1 times [2021-08-21 18:00:45,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:45,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937096270] [2021-08-21 18:00:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:45,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:45,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:45,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937096270] [2021-08-21 18:00:45,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937096270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:45,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444446988] [2021-08-21 18:00:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:45,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:45,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:45,893 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) [2021-08-21 18:00:45,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:00:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:45,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:00:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:46,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444446988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:46,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:46,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-21 18:00:46,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710254405] [2021-08-21 18:00:46,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:00:46,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:00:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:00:46,162 INFO L87 Difference]: Start difference. First operand 116 states and 202 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:46,221 INFO L93 Difference]: Finished difference Result 187 states and 336 transitions. [2021-08-21 18:00:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:00:46,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:00:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:46,224 INFO L225 Difference]: With dead ends: 187 [2021-08-21 18:00:46,224 INFO L226 Difference]: Without dead ends: 187 [2021-08-21 18:00:46,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:00:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-21 18:00:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2021-08-21 18:00:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9066666666666667) internal successors, (286), 150 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 286 transitions. [2021-08-21 18:00:46,234 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 286 transitions. Word has length 29 [2021-08-21 18:00:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:46,235 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 286 transitions. [2021-08-21 18:00:46,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 286 transitions. [2021-08-21 18:00:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:46,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:46,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:46,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:46,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:46,438 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:46,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1367637323, now seen corresponding path program 1 times [2021-08-21 18:00:46,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:46,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693885184] [2021-08-21 18:00:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:46,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:00:46,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:46,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693885184] [2021-08-21 18:00:46,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693885184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:46,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213407461] [2021-08-21 18:00:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:46,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:46,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:46,546 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) [2021-08-21 18:00:46,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:00:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:46,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:00:46,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:00:46,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213407461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:46,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:46,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-21 18:00:46,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744783516] [2021-08-21 18:00:46,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:00:46,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:46,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:00:46,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:00:46,889 INFO L87 Difference]: Start difference. First operand 151 states and 286 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 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) [2021-08-21 18:00:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:47,009 INFO L93 Difference]: Finished difference Result 247 states and 476 transitions. [2021-08-21 18:00:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:00:47,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:47,011 INFO L225 Difference]: With dead ends: 247 [2021-08-21 18:00:47,011 INFO L226 Difference]: Without dead ends: 247 [2021-08-21 18:00:47,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:00:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-21 18:00:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 199. [2021-08-21 18:00:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1616161616161618) internal successors, (428), 198 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 428 transitions. [2021-08-21 18:00:47,016 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 428 transitions. Word has length 31 [2021-08-21 18:00:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:47,017 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 428 transitions. [2021-08-21 18:00:47,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 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) [2021-08-21 18:00:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 428 transitions. [2021-08-21 18:00:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:47,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:47,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:47,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:47,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:47,234 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:47,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:47,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229453, now seen corresponding path program 1 times [2021-08-21 18:00:47,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:47,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239839005] [2021-08-21 18:00:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:47,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:47,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:47,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239839005] [2021-08-21 18:00:47,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239839005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:47,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245845425] [2021-08-21 18:00:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:47,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:47,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:47,321 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) [2021-08-21 18:00:47,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:00:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:00:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:00:47,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245845425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:47,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:47,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-21 18:00:47,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717130137] [2021-08-21 18:00:47,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:00:47,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:47,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:00:47,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:00:47,706 INFO L87 Difference]: Start difference. First operand 199 states and 428 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:47,784 INFO L93 Difference]: Finished difference Result 720 states and 1333 transitions. [2021-08-21 18:00:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:00:47,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:47,787 INFO L225 Difference]: With dead ends: 720 [2021-08-21 18:00:47,787 INFO L226 Difference]: Without dead ends: 544 [2021-08-21 18:00:47,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:00:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-21 18:00:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 388. [2021-08-21 18:00:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.054263565891473) internal successors, (795), 387 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 795 transitions. [2021-08-21 18:00:47,798 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 795 transitions. Word has length 33 [2021-08-21 18:00:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:47,798 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 795 transitions. [2021-08-21 18:00:47,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 795 transitions. [2021-08-21 18:00:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:47,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:47,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:47,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:48,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:48,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:48,013 INFO L82 PathProgramCache]: Analyzing trace with hash 786069261, now seen corresponding path program 2 times [2021-08-21 18:00:48,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:48,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899575126] [2021-08-21 18:00:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:48,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:48,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:48,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899575126] [2021-08-21 18:00:48,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899575126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:48,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749814862] [2021-08-21 18:00:48,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:48,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:48,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:48,121 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) [2021-08-21 18:00:48,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:00:48,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:48,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:48,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:00:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:48,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749814862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:48,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:48,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-21 18:00:48,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669157329] [2021-08-21 18:00:48,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:00:48,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:00:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:00:48,521 INFO L87 Difference]: Start difference. First operand 388 states and 795 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:48,597 INFO L93 Difference]: Finished difference Result 930 states and 1745 transitions. [2021-08-21 18:00:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:00:48,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:48,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:48,600 INFO L225 Difference]: With dead ends: 930 [2021-08-21 18:00:48,600 INFO L226 Difference]: Without dead ends: 808 [2021-08-21 18:00:48,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:00:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-08-21 18:00:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 460. [2021-08-21 18:00:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.167755991285403) internal successors, (995), 459 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 995 transitions. [2021-08-21 18:00:48,611 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 995 transitions. Word has length 33 [2021-08-21 18:00:48,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:48,611 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 995 transitions. [2021-08-21 18:00:48,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 995 transitions. [2021-08-21 18:00:48,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:48,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:48,613 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:48,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:48,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:48,830 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:48,831 INFO L82 PathProgramCache]: Analyzing trace with hash 119411913, now seen corresponding path program 3 times [2021-08-21 18:00:48,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:48,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135663954] [2021-08-21 18:00:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:48,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:48,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:48,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135663954] [2021-08-21 18:00:48,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135663954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:48,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855109734] [2021-08-21 18:00:48,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:48,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:48,902 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) [2021-08-21 18:00:48,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:00:49,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:00:49,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:49,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:00:49,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:49,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855109734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:49,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:49,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 18:00:49,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510459462] [2021-08-21 18:00:49,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:00:49,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:00:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:00:49,287 INFO L87 Difference]: Start difference. First operand 460 states and 995 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:49,354 INFO L93 Difference]: Finished difference Result 937 states and 1776 transitions. [2021-08-21 18:00:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:00:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:49,358 INFO L225 Difference]: With dead ends: 937 [2021-08-21 18:00:49,358 INFO L226 Difference]: Without dead ends: 769 [2021-08-21 18:00:49,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:00:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-08-21 18:00:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 487. [2021-08-21 18:00:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.051440329218107) internal successors, (997), 486 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 997 transitions. [2021-08-21 18:00:49,369 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 997 transitions. Word has length 33 [2021-08-21 18:00:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:49,369 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 997 transitions. [2021-08-21 18:00:49,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 997 transitions. [2021-08-21 18:00:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:00:49,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:49,371 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:49,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:49,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:49,581 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2008614863, now seen corresponding path program 4 times [2021-08-21 18:00:49,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:49,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355984561] [2021-08-21 18:00:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:49,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:49,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:49,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355984561] [2021-08-21 18:00:49,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355984561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:49,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435405296] [2021-08-21 18:00:49,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:49,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:49,629 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) [2021-08-21 18:00:49,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:00:49,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:49,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:00:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:50,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435405296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:50,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:50,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-21 18:00:50,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345689746] [2021-08-21 18:00:50,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:00:50,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:50,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:00:50,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:00:50,011 INFO L87 Difference]: Start difference. First operand 487 states and 997 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:50,180 INFO L93 Difference]: Finished difference Result 1404 states and 2860 transitions. [2021-08-21 18:00:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:00:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:00:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:50,186 INFO L225 Difference]: With dead ends: 1404 [2021-08-21 18:00:50,186 INFO L226 Difference]: Without dead ends: 1404 [2021-08-21 18:00:50,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:00:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-08-21 18:00:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 798. [2021-08-21 18:00:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 2.109159347553325) internal successors, (1681), 797 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1681 transitions. [2021-08-21 18:00:50,203 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1681 transitions. Word has length 35 [2021-08-21 18:00:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:50,203 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1681 transitions. [2021-08-21 18:00:50,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1681 transitions. [2021-08-21 18:00:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:00:50,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:50,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:50,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:50,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:50,417 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:50,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1411709233, now seen corresponding path program 5 times [2021-08-21 18:00:50,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:50,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282339322] [2021-08-21 18:00:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:50,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:50,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:50,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282339322] [2021-08-21 18:00:50,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282339322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:50,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708023260] [2021-08-21 18:00:50,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:50,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:50,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:50,468 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) [2021-08-21 18:00:50,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:00:50,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:00:50,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:00:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:50,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708023260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:50,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:50,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-21 18:00:50,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509205847] [2021-08-21 18:00:50,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:00:50,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:00:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:00:50,918 INFO L87 Difference]: Start difference. First operand 798 states and 1681 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:51,251 INFO L93 Difference]: Finished difference Result 2409 states and 5120 transitions. [2021-08-21 18:00:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:00:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:00:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:51,262 INFO L225 Difference]: With dead ends: 2409 [2021-08-21 18:00:51,262 INFO L226 Difference]: Without dead ends: 2409 [2021-08-21 18:00:51,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2021-08-21 18:00:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1226. [2021-08-21 18:00:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.1951020408163266) internal successors, (2689), 1225 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2689 transitions. [2021-08-21 18:00:51,297 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2689 transitions. Word has length 35 [2021-08-21 18:00:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:51,298 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2689 transitions. [2021-08-21 18:00:51,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2689 transitions. [2021-08-21 18:00:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:00:51,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:51,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:51,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:51,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 18:00:51,513 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:51,513 INFO L82 PathProgramCache]: Analyzing trace with hash -24209457, now seen corresponding path program 6 times [2021-08-21 18:00:51,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:51,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185539584] [2021-08-21 18:00:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:51,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:51,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:51,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185539584] [2021-08-21 18:00:51,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185539584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:51,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663007385] [2021-08-21 18:00:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:51,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:51,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:51,553 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) [2021-08-21 18:00:51,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:00:51,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:00:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:00:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:51,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663007385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:51,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:51,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-21 18:00:51,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382474133] [2021-08-21 18:00:51,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:00:51,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:00:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:00:51,966 INFO L87 Difference]: Start difference. First operand 1226 states and 2689 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:52,070 INFO L93 Difference]: Finished difference Result 1609 states and 3435 transitions. [2021-08-21 18:00:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:00:52,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:00:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:52,076 INFO L225 Difference]: With dead ends: 1609 [2021-08-21 18:00:52,076 INFO L226 Difference]: Without dead ends: 1569 [2021-08-21 18:00:52,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:00:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-08-21 18:00:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1258. [2021-08-21 18:00:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 2.1821797931583133) internal successors, (2743), 1257 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2743 transitions. [2021-08-21 18:00:52,097 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2743 transitions. Word has length 35 [2021-08-21 18:00:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:52,097 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 2743 transitions. [2021-08-21 18:00:52,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2743 transitions. [2021-08-21 18:00:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:00:52,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:52,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:52,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:52,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:52,317 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1447270449, now seen corresponding path program 7 times [2021-08-21 18:00:52,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:52,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936638240] [2021-08-21 18:00:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:52,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:52,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:52,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936638240] [2021-08-21 18:00:52,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936638240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:52,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252744798] [2021-08-21 18:00:52,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:52,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:52,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:52,346 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) [2021-08-21 18:00:52,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:00:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:52,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:00:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:52,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252744798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:52,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:52,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-21 18:00:52,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057561966] [2021-08-21 18:00:52,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:00:52,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:00:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:00:52,810 INFO L87 Difference]: Start difference. First operand 1258 states and 2743 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:52,950 INFO L93 Difference]: Finished difference Result 2772 states and 5838 transitions. [2021-08-21 18:00:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:00:52,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:00:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:52,959 INFO L225 Difference]: With dead ends: 2772 [2021-08-21 18:00:52,959 INFO L226 Difference]: Without dead ends: 2772 [2021-08-21 18:00:52,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:00:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2021-08-21 18:00:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 1715. [2021-08-21 18:00:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 2.2252042007001167) internal successors, (3814), 1714 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 3814 transitions. [2021-08-21 18:00:52,995 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 3814 transitions. Word has length 35 [2021-08-21 18:00:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:52,995 INFO L470 AbstractCegarLoop]: Abstraction has 1715 states and 3814 transitions. [2021-08-21 18:00:52,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 3814 transitions. [2021-08-21 18:00:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:00:52,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:52,999 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:53,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:53,212 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,SelfDestructingSolverStorable12 [2021-08-21 18:00:53,213 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2009098289, now seen corresponding path program 8 times [2021-08-21 18:00:53,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:53,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747996845] [2021-08-21 18:00:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:53,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:53,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:53,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747996845] [2021-08-21 18:00:53,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747996845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:53,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433878581] [2021-08-21 18:00:53,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:53,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:53,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:53,275 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) [2021-08-21 18:00:53,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:00:53,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:53,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:53,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:00:53,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:53,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433878581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:53,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:53,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-08-21 18:00:53,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031718961] [2021-08-21 18:00:53,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:00:53,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:53,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:00:53,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:00:53,867 INFO L87 Difference]: Start difference. First operand 1715 states and 3814 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:54,600 INFO L93 Difference]: Finished difference Result 4520 states and 8680 transitions. [2021-08-21 18:00:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:00:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:00:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:54,618 INFO L225 Difference]: With dead ends: 4520 [2021-08-21 18:00:54,619 INFO L226 Difference]: Without dead ends: 4450 [2021-08-21 18:00:54,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 537.9ms TimeCoverageRelationStatistics Valid=508, Invalid=1654, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:00:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2021-08-21 18:00:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 2933. [2021-08-21 18:00:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2932 states have (on average 2.168144611186903) internal successors, (6357), 2932 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 6357 transitions. [2021-08-21 18:00:54,718 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 6357 transitions. Word has length 35 [2021-08-21 18:00:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:54,718 INFO L470 AbstractCegarLoop]: Abstraction has 2933 states and 6357 transitions. [2021-08-21 18:00:54,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 6357 transitions. [2021-08-21 18:00:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:00:54,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:54,726 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:54,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:54,940 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,SelfDestructingSolverStorable13 [2021-08-21 18:00:54,941 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash -234320239, now seen corresponding path program 9 times [2021-08-21 18:00:54,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:54,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246336212] [2021-08-21 18:00:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:54,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:00:54,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:54,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246336212] [2021-08-21 18:00:54,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246336212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:54,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382962332] [2021-08-21 18:00:54,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:54,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:54,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:54,989 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) [2021-08-21 18:00:54,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:00:55,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:00:55,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:55,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:00:55,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:00:55,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382962332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:55,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:55,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-21 18:00:55,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502517155] [2021-08-21 18:00:55,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:00:55,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:00:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:00:55,558 INFO L87 Difference]: Start difference. First operand 2933 states and 6357 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:55,776 INFO L93 Difference]: Finished difference Result 5826 states and 12221 transitions. [2021-08-21 18:00:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:00:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:00:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:55,813 INFO L225 Difference]: With dead ends: 5826 [2021-08-21 18:00:55,813 INFO L226 Difference]: Without dead ends: 5826 [2021-08-21 18:00:55,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:00:55,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-08-21 18:00:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 4252. [2021-08-21 18:00:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4252 states, 4251 states have (on average 2.2084215478710894) internal successors, (9388), 4251 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 9388 transitions. [2021-08-21 18:00:55,931 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 9388 transitions. Word has length 37 [2021-08-21 18:00:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:55,931 INFO L470 AbstractCegarLoop]: Abstraction has 4252 states and 9388 transitions. [2021-08-21 18:00:55,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 9388 transitions. [2021-08-21 18:00:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:00:55,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:55,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:55,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:56,152 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,SelfDestructingSolverStorable14 [2021-08-21 18:00:56,153 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:56,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1429127313, now seen corresponding path program 10 times [2021-08-21 18:00:56,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:56,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182716345] [2021-08-21 18:00:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:56,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:00:56,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:56,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182716345] [2021-08-21 18:00:56,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182716345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:56,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12399288] [2021-08-21 18:00:56,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:56,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:56,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:56,186 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) [2021-08-21 18:00:56,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:00:56,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:56,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:56,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:00:56,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:00:56,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12399288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:56,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:56,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-21 18:00:56,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357833901] [2021-08-21 18:00:56,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:00:56,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:56,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:00:56,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:00:56,657 INFO L87 Difference]: Start difference. First operand 4252 states and 9388 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:56,811 INFO L93 Difference]: Finished difference Result 6598 states and 14249 transitions. [2021-08-21 18:00:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:00:56,812 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:00:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:56,828 INFO L225 Difference]: With dead ends: 6598 [2021-08-21 18:00:56,828 INFO L226 Difference]: Without dead ends: 6502 [2021-08-21 18:00:56,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:00:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6502 states. [2021-08-21 18:00:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6502 to 5552. [2021-08-21 18:00:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5551 states have (on average 2.2154566744730677) internal successors, (12298), 5551 states have internal predecessors, (12298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 12298 transitions. [2021-08-21 18:00:56,953 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 12298 transitions. Word has length 37 [2021-08-21 18:00:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:56,953 INFO L470 AbstractCegarLoop]: Abstraction has 5552 states and 12298 transitions. [2021-08-21 18:00:56,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 12298 transitions. [2021-08-21 18:00:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:00:56,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:56,965 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:56,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:57,189 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,SelfDestructingSolverStorable15 [2021-08-21 18:00:57,189 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:57,189 INFO L82 PathProgramCache]: Analyzing trace with hash -41075185, now seen corresponding path program 11 times [2021-08-21 18:00:57,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:57,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899154312] [2021-08-21 18:00:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:57,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:00:57,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:57,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899154312] [2021-08-21 18:00:57,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899154312] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:00:57,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:00:57,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:00:57,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768361583] [2021-08-21 18:00:57,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:00:57,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:57,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:00:57,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:00:57,217 INFO L87 Difference]: Start difference. First operand 5552 states and 12298 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 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) [2021-08-21 18:00:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:57,238 INFO L93 Difference]: Finished difference Result 5494 states and 12075 transitions. [2021-08-21 18:00:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:00:57,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 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 39 [2021-08-21 18:00:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:57,249 INFO L225 Difference]: With dead ends: 5494 [2021-08-21 18:00:57,249 INFO L226 Difference]: Without dead ends: 5436 [2021-08-21 18:00:57,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:00:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2021-08-21 18:00:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 5436. [2021-08-21 18:00:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5436 states, 5435 states have (on average 2.211039558417663) internal successors, (12017), 5435 states have internal predecessors, (12017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5436 states to 5436 states and 12017 transitions. [2021-08-21 18:00:57,352 INFO L78 Accepts]: Start accepts. Automaton has 5436 states and 12017 transitions. Word has length 39 [2021-08-21 18:00:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:57,353 INFO L470 AbstractCegarLoop]: Abstraction has 5436 states and 12017 transitions. [2021-08-21 18:00:57,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 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) [2021-08-21 18:00:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5436 states and 12017 transitions. [2021-08-21 18:00:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:00:57,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:57,364 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:57,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-21 18:00:57,364 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash -346036715, now seen corresponding path program 12 times [2021-08-21 18:00:57,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:57,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642414320] [2021-08-21 18:00:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:57,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:00:57,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:57,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642414320] [2021-08-21 18:00:57,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642414320] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:00:57,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:00:57,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:00:57,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070522071] [2021-08-21 18:00:57,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:00:57,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:57,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:00:57,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:00:57,394 INFO L87 Difference]: Start difference. First operand 5436 states and 12017 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:57,424 INFO L93 Difference]: Finished difference Result 7686 states and 16791 transitions. [2021-08-21 18:00:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:00:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:00:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:57,455 INFO L225 Difference]: With dead ends: 7686 [2021-08-21 18:00:57,455 INFO L226 Difference]: Without dead ends: 7252 [2021-08-21 18:00:57,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:00:57,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7252 states. [2021-08-21 18:00:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7252 to 6814. [2021-08-21 18:00:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6814 states, 6813 states have (on average 2.212094525172464) internal successors, (15071), 6813 states have internal predecessors, (15071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6814 states to 6814 states and 15071 transitions. [2021-08-21 18:00:57,625 INFO L78 Accepts]: Start accepts. Automaton has 6814 states and 15071 transitions. Word has length 41 [2021-08-21 18:00:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:57,625 INFO L470 AbstractCegarLoop]: Abstraction has 6814 states and 15071 transitions. [2021-08-21 18:00:57,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6814 states and 15071 transitions. [2021-08-21 18:00:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:00:57,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:57,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:57,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 18:00:57,639 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:57,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:57,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2077882859, now seen corresponding path program 13 times [2021-08-21 18:00:57,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:57,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614957945] [2021-08-21 18:00:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:57,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:00:57,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:57,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614957945] [2021-08-21 18:00:57,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614957945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:57,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227437995] [2021-08-21 18:00:57,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:57,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:57,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:57,732 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) [2021-08-21 18:00:57,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:00:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:58,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:00:58,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:00:58,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227437995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:58,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:58,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 18:00:58,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629234789] [2021-08-21 18:00:58,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:00:58,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:00:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:00:58,415 INFO L87 Difference]: Start difference. First operand 6814 states and 15071 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:58,546 INFO L93 Difference]: Finished difference Result 9272 states and 19644 transitions. [2021-08-21 18:00:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:00:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:00:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:58,566 INFO L225 Difference]: With dead ends: 9272 [2021-08-21 18:00:58,566 INFO L226 Difference]: Without dead ends: 9002 [2021-08-21 18:00:58,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:00:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9002 states. [2021-08-21 18:00:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9002 to 7664. [2021-08-21 18:00:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7664 states, 7663 states have (on average 2.193527339162208) internal successors, (16809), 7663 states have internal predecessors, (16809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7664 states to 7664 states and 16809 transitions. [2021-08-21 18:00:58,708 INFO L78 Accepts]: Start accepts. Automaton has 7664 states and 16809 transitions. Word has length 41 [2021-08-21 18:00:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:58,708 INFO L470 AbstractCegarLoop]: Abstraction has 7664 states and 16809 transitions. [2021-08-21 18:00:58,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 7664 states and 16809 transitions. [2021-08-21 18:00:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:00:58,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:58,735 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:58,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:58,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:58,945 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:00:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:58,945 INFO L82 PathProgramCache]: Analyzing trace with hash 65283605, now seen corresponding path program 14 times [2021-08-21 18:00:58,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:58,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708951336] [2021-08-21 18:00:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:58,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:59,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:59,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708951336] [2021-08-21 18:00:59,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708951336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:59,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747862516] [2021-08-21 18:00:59,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:59,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:59,024 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) [2021-08-21 18:00:59,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:00:59,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:59,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:00:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:00:59,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747862516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:59,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:59,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 18:00:59,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568377795] [2021-08-21 18:00:59,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:00:59,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:00:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:00:59,695 INFO L87 Difference]: Start difference. First operand 7664 states and 16809 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:59,854 INFO L93 Difference]: Finished difference Result 10570 states and 22193 transitions. [2021-08-21 18:00:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:00:59,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:00:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:59,881 INFO L225 Difference]: With dead ends: 10570 [2021-08-21 18:00:59,881 INFO L226 Difference]: Without dead ends: 9986 [2021-08-21 18:00:59,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:00:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2021-08-21 18:01:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 8161. [2021-08-21 18:01:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 8160 states have (on average 2.1903186274509805) internal successors, (17873), 8160 states have internal predecessors, (17873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 17873 transitions. [2021-08-21 18:01:00,106 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 17873 transitions. Word has length 41 [2021-08-21 18:01:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:00,106 INFO L470 AbstractCegarLoop]: Abstraction has 8161 states and 17873 transitions. [2021-08-21 18:01:00,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 17873 transitions. [2021-08-21 18:01:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:00,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:00,121 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:00,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:00,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:00,329 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:00,329 INFO L82 PathProgramCache]: Analyzing trace with hash 815572501, now seen corresponding path program 15 times [2021-08-21 18:01:00,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:00,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220833422] [2021-08-21 18:01:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:00,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:00,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:00,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220833422] [2021-08-21 18:01:00,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220833422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:00,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706691580] [2021-08-21 18:01:00,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:00,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:00,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:00,433 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) [2021-08-21 18:01:00,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:01:00,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:01:00,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:00,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 18:01:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:01,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706691580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:01,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:01,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:01:01,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810768996] [2021-08-21 18:01:01,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:01:01,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:01:01,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:01:01,225 INFO L87 Difference]: Start difference. First operand 8161 states and 17873 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:01,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:01,398 INFO L93 Difference]: Finished difference Result 11735 states and 24355 transitions. [2021-08-21 18:01:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:01:01,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:01,418 INFO L225 Difference]: With dead ends: 11735 [2021-08-21 18:01:01,418 INFO L226 Difference]: Without dead ends: 11095 [2021-08-21 18:01:01,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:01:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11095 states. [2021-08-21 18:01:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11095 to 8408. [2021-08-21 18:01:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8408 states, 8407 states have (on average 2.192458665397883) internal successors, (18432), 8407 states have internal predecessors, (18432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8408 states to 8408 states and 18432 transitions. [2021-08-21 18:01:01,595 INFO L78 Accepts]: Start accepts. Automaton has 8408 states and 18432 transitions. Word has length 41 [2021-08-21 18:01:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:01,595 INFO L470 AbstractCegarLoop]: Abstraction has 8408 states and 18432 transitions. [2021-08-21 18:01:01,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 8408 states and 18432 transitions. [2021-08-21 18:01:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:01,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:01,610 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:01,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:01,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:01,828 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1628535275, now seen corresponding path program 16 times [2021-08-21 18:01:01,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:01,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291254075] [2021-08-21 18:01:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:01,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:01,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:01,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291254075] [2021-08-21 18:01:01,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291254075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:01,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228841607] [2021-08-21 18:01:01,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:01,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:01,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:01,938 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) [2021-08-21 18:01:01,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:01:02,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:02,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:02,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228841607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:02,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:02,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 18:01:02,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494634230] [2021-08-21 18:01:02,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:01:02,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:02,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:01:02,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:01:02,629 INFO L87 Difference]: Start difference. First operand 8408 states and 18432 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:02,782 INFO L93 Difference]: Finished difference Result 12053 states and 24837 transitions. [2021-08-21 18:01:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:01:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:02,802 INFO L225 Difference]: With dead ends: 12053 [2021-08-21 18:01:02,803 INFO L226 Difference]: Without dead ends: 10661 [2021-08-21 18:01:02,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:01:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10661 states. [2021-08-21 18:01:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10661 to 8716. [2021-08-21 18:01:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8715 states have (on average 2.1876075731497417) internal successors, (19065), 8715 states have internal predecessors, (19065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 19065 transitions. [2021-08-21 18:01:02,955 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 19065 transitions. Word has length 41 [2021-08-21 18:01:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:02,955 INFO L470 AbstractCegarLoop]: Abstraction has 8716 states and 19065 transitions. [2021-08-21 18:01:02,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 19065 transitions. [2021-08-21 18:01:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:02,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:02,970 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:02,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:03,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:03,185 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1780049429, now seen corresponding path program 17 times [2021-08-21 18:01:03,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:03,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633174042] [2021-08-21 18:01:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:03,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:03,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:03,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633174042] [2021-08-21 18:01:03,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633174042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:03,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628049189] [2021-08-21 18:01:03,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:03,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:03,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:03,270 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) [2021-08-21 18:01:03,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:01:03,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:01:03,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:03,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:01:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:04,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628049189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:04,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:04,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-21 18:01:04,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211712543] [2021-08-21 18:01:04,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:01:04,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:01:04,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:01:04,132 INFO L87 Difference]: Start difference. First operand 8716 states and 19065 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:04,276 INFO L93 Difference]: Finished difference Result 14596 states and 29986 transitions. [2021-08-21 18:01:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:01:04,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:04,300 INFO L225 Difference]: With dead ends: 14596 [2021-08-21 18:01:04,300 INFO L226 Difference]: Without dead ends: 13155 [2021-08-21 18:01:04,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2021-08-21 18:01:04,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 10715. [2021-08-21 18:01:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10715 states, 10714 states have (on average 2.199271980586149) internal successors, (23563), 10714 states have internal predecessors, (23563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10715 states to 10715 states and 23563 transitions. [2021-08-21 18:01:04,472 INFO L78 Accepts]: Start accepts. Automaton has 10715 states and 23563 transitions. Word has length 41 [2021-08-21 18:01:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:04,472 INFO L470 AbstractCegarLoop]: Abstraction has 10715 states and 23563 transitions. [2021-08-21 18:01:04,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 10715 states and 23563 transitions. [2021-08-21 18:01:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:04,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:04,489 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:04,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:04,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:04,701 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1113392081, now seen corresponding path program 18 times [2021-08-21 18:01:04,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:04,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909911103] [2021-08-21 18:01:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:04,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:04,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:04,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909911103] [2021-08-21 18:01:04,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909911103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:04,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316445207] [2021-08-21 18:01:04,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:04,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:04,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:04,785 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:01:04,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:01:05,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:01:05,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:05,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:05,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:05,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316445207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:05,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:05,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 18:01:05,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442094044] [2021-08-21 18:01:05,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:01:05,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:01:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:01:05,631 INFO L87 Difference]: Start difference. First operand 10715 states and 23563 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:05,782 INFO L93 Difference]: Finished difference Result 13880 states and 29786 transitions. [2021-08-21 18:01:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:01:05,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:05,807 INFO L225 Difference]: With dead ends: 13880 [2021-08-21 18:01:05,807 INFO L226 Difference]: Without dead ends: 13828 [2021-08-21 18:01:05,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:01:05,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13828 states. [2021-08-21 18:01:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13828 to 11814. [2021-08-21 18:01:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11814 states, 11813 states have (on average 2.2195885888428) internal successors, (26220), 11813 states have internal predecessors, (26220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11814 states to 11814 states and 26220 transitions. [2021-08-21 18:01:06,039 INFO L78 Accepts]: Start accepts. Automaton has 11814 states and 26220 transitions. Word has length 41 [2021-08-21 18:01:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 11814 states and 26220 transitions. [2021-08-21 18:01:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 11814 states and 26220 transitions. [2021-08-21 18:01:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:06,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:06,057 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:06,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 18:01:06,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:06,273 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:06,273 INFO L82 PathProgramCache]: Analyzing trace with hash 241190097, now seen corresponding path program 19 times [2021-08-21 18:01:06,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:06,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106305422] [2021-08-21 18:01:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:06,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:06,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:06,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106305422] [2021-08-21 18:01:06,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106305422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:06,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451614547] [2021-08-21 18:01:06,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:06,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:06,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:06,382 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) [2021-08-21 18:01:06,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:01:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:06,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:06,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:07,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451614547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:07,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:07,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:01:07,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149691866] [2021-08-21 18:01:07,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:01:07,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:01:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:01:07,222 INFO L87 Difference]: Start difference. First operand 11814 states and 26220 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:07,415 INFO L93 Difference]: Finished difference Result 17378 states and 35795 transitions. [2021-08-21 18:01:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:01:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:07,447 INFO L225 Difference]: With dead ends: 17378 [2021-08-21 18:01:07,448 INFO L226 Difference]: Without dead ends: 15404 [2021-08-21 18:01:07,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:01:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15404 states. [2021-08-21 18:01:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15404 to 10258. [2021-08-21 18:01:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10258 states, 10257 states have (on average 2.1828994832797113) internal successors, (22390), 10257 states have internal predecessors, (22390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10258 states to 10258 states and 22390 transitions. [2021-08-21 18:01:07,674 INFO L78 Accepts]: Start accepts. Automaton has 10258 states and 22390 transitions. Word has length 41 [2021-08-21 18:01:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:07,675 INFO L470 AbstractCegarLoop]: Abstraction has 10258 states and 22390 transitions. [2021-08-21 18:01:07,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 10258 states and 22390 transitions. [2021-08-21 18:01:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:07,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:07,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:07,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:07,890 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,SelfDestructingSolverStorable24 [2021-08-21 18:01:07,890 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:07,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1712634347, now seen corresponding path program 20 times [2021-08-21 18:01:07,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:07,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936821248] [2021-08-21 18:01:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:07,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:07,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:07,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936821248] [2021-08-21 18:01:07,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936821248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:07,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175203391] [2021-08-21 18:01:07,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:07,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:07,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:07,979 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) [2021-08-21 18:01:07,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:01:08,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:08,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:08,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:01:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:08,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175203391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:08,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:08,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:01:08,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637187815] [2021-08-21 18:01:08,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:01:08,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:08,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:01:08,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:01:08,836 INFO L87 Difference]: Start difference. First operand 10258 states and 22390 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:08,994 INFO L93 Difference]: Finished difference Result 13151 states and 27696 transitions. [2021-08-21 18:01:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:01:08,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:09,020 INFO L225 Difference]: With dead ends: 13151 [2021-08-21 18:01:09,020 INFO L226 Difference]: Without dead ends: 12839 [2021-08-21 18:01:09,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:01:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12839 states. [2021-08-21 18:01:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12839 to 11714. [2021-08-21 18:01:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11714 states, 11713 states have (on average 2.1887646205071287) internal successors, (25637), 11713 states have internal predecessors, (25637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11714 states to 11714 states and 25637 transitions. [2021-08-21 18:01:09,227 INFO L78 Accepts]: Start accepts. Automaton has 11714 states and 25637 transitions. Word has length 41 [2021-08-21 18:01:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:09,227 INFO L470 AbstractCegarLoop]: Abstraction has 11714 states and 25637 transitions. [2021-08-21 18:01:09,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:09,228 INFO L276 IsEmpty]: Start isEmpty. Operand 11714 states and 25637 transitions. [2021-08-21 18:01:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:09,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:09,247 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:09,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:09,453 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,SelfDestructingSolverStorable25 [2021-08-21 18:01:09,453 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1253172757, now seen corresponding path program 21 times [2021-08-21 18:01:09,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:09,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400660731] [2021-08-21 18:01:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:09,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:09,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:09,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400660731] [2021-08-21 18:01:09,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400660731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:09,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609506531] [2021-08-21 18:01:09,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:09,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:09,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:09,557 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) [2021-08-21 18:01:09,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:01:10,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:01:10,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:10,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:10,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:10,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609506531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:10,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:10,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 18:01:10,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650998010] [2021-08-21 18:01:10,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:01:10,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:01:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:01:10,563 INFO L87 Difference]: Start difference. First operand 11714 states and 25637 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:10,742 INFO L93 Difference]: Finished difference Result 18854 states and 39887 transitions. [2021-08-21 18:01:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:01:10,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:10,783 INFO L225 Difference]: With dead ends: 18854 [2021-08-21 18:01:10,783 INFO L226 Difference]: Without dead ends: 18696 [2021-08-21 18:01:10,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:01:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18696 states. [2021-08-21 18:01:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18696 to 14811. [2021-08-21 18:01:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14811 states, 14810 states have (on average 2.209182984469953) internal successors, (32718), 14810 states have internal predecessors, (32718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14811 states to 14811 states and 32718 transitions. [2021-08-21 18:01:11,087 INFO L78 Accepts]: Start accepts. Automaton has 14811 states and 32718 transitions. Word has length 41 [2021-08-21 18:01:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:11,087 INFO L470 AbstractCegarLoop]: Abstraction has 14811 states and 32718 transitions. [2021-08-21 18:01:11,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 14811 states and 32718 transitions. [2021-08-21 18:01:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:11,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:11,117 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:11,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:11,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:01:11,333 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 586515409, now seen corresponding path program 22 times [2021-08-21 18:01:11,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:11,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851539336] [2021-08-21 18:01:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:11,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:11,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:11,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851539336] [2021-08-21 18:01:11,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851539336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:11,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841148711] [2021-08-21 18:01:11,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:11,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:11,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:11,425 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) [2021-08-21 18:01:11,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:01:12,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:12,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:12,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:01:12,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:12,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841148711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:12,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:12,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 18:01:12,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361958990] [2021-08-21 18:01:12,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:01:12,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:01:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:01:12,460 INFO L87 Difference]: Start difference. First operand 14811 states and 32718 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:12,654 INFO L93 Difference]: Finished difference Result 19265 states and 40917 transitions. [2021-08-21 18:01:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:01:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:12,690 INFO L225 Difference]: With dead ends: 19265 [2021-08-21 18:01:12,690 INFO L226 Difference]: Without dead ends: 18584 [2021-08-21 18:01:12,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:01:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18584 states. [2021-08-21 18:01:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18584 to 12630. [2021-08-21 18:01:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12630 states, 12629 states have (on average 2.1807744081083222) internal successors, (27541), 12629 states have internal predecessors, (27541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 27541 transitions. [2021-08-21 18:01:12,911 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 27541 transitions. Word has length 41 [2021-08-21 18:01:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:12,911 INFO L470 AbstractCegarLoop]: Abstraction has 12630 states and 27541 transitions. [2021-08-21 18:01:12,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 27541 transitions. [2021-08-21 18:01:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:12,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:12,930 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:12,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:13,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:13,149 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:13,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1595873771, now seen corresponding path program 23 times [2021-08-21 18:01:13,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:13,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500312309] [2021-08-21 18:01:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:13,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:13,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:13,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500312309] [2021-08-21 18:01:13,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500312309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:13,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124265801] [2021-08-21 18:01:13,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:13,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:13,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:13,240 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) [2021-08-21 18:01:13,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:01:13,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:01:13,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:13,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:01:13,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:14,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124265801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:14,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:14,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:01:14,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875298120] [2021-08-21 18:01:14,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:01:14,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:01:14,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:01:14,313 INFO L87 Difference]: Start difference. First operand 12630 states and 27541 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:14,561 INFO L93 Difference]: Finished difference Result 19713 states and 41128 transitions. [2021-08-21 18:01:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:01:14,562 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:14,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:14,597 INFO L225 Difference]: With dead ends: 19713 [2021-08-21 18:01:14,597 INFO L226 Difference]: Without dead ends: 18317 [2021-08-21 18:01:14,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18317 states. [2021-08-21 18:01:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18317 to 15786. [2021-08-21 18:01:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15786 states, 15785 states have (on average 2.185302502375673) internal successors, (34495), 15785 states have internal predecessors, (34495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15786 states to 15786 states and 34495 transitions. [2021-08-21 18:01:14,928 INFO L78 Accepts]: Start accepts. Automaton has 15786 states and 34495 transitions. Word has length 41 [2021-08-21 18:01:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:14,928 INFO L470 AbstractCegarLoop]: Abstraction has 15786 states and 34495 transitions. [2021-08-21 18:01:14,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 15786 states and 34495 transitions. [2021-08-21 18:01:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:14,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:14,951 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:14,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 18:01:15,151 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,SelfDestructingSolverStorable28 [2021-08-21 18:01:15,152 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1812710933, now seen corresponding path program 24 times [2021-08-21 18:01:15,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:15,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92225043] [2021-08-21 18:01:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:15,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:15,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:15,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92225043] [2021-08-21 18:01:15,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92225043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:15,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153068824] [2021-08-21 18:01:15,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:15,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:15,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:15,269 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) [2021-08-21 18:01:15,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:01:15,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:01:15,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:15,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:15,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:16,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153068824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:16,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:16,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 18:01:16,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004221962] [2021-08-21 18:01:16,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:01:16,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:01:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:01:16,358 INFO L87 Difference]: Start difference. First operand 15786 states and 34495 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:16,702 INFO L93 Difference]: Finished difference Result 34901 states and 73417 transitions. [2021-08-21 18:01:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:01:16,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:16,856 INFO L225 Difference]: With dead ends: 34901 [2021-08-21 18:01:16,856 INFO L226 Difference]: Without dead ends: 32962 [2021-08-21 18:01:16,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32962 states. [2021-08-21 18:01:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32962 to 23507. [2021-08-21 18:01:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23507 states, 23506 states have (on average 2.2617629541393685) internal successors, (53165), 23506 states have internal predecessors, (53165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23507 states to 23507 states and 53165 transitions. [2021-08-21 18:01:17,328 INFO L78 Accepts]: Start accepts. Automaton has 23507 states and 53165 transitions. Word has length 41 [2021-08-21 18:01:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:17,328 INFO L470 AbstractCegarLoop]: Abstraction has 23507 states and 53165 transitions. [2021-08-21 18:01:17,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 23507 states and 53165 transitions. [2021-08-21 18:01:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:17,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:17,369 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:17,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 18:01:17,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:17,570 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:17,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1146053585, now seen corresponding path program 25 times [2021-08-21 18:01:17,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:17,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660427735] [2021-08-21 18:01:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:17,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:17,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:17,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660427735] [2021-08-21 18:01:17,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660427735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:17,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263583061] [2021-08-21 18:01:17,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:17,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:17,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:17,671 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) [2021-08-21 18:01:17,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:01:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:18,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:18,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263583061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:18,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:18,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:01:18,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729917939] [2021-08-21 18:01:18,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:01:18,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:01:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:01:18,793 INFO L87 Difference]: Start difference. First operand 23507 states and 53165 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:19,000 INFO L93 Difference]: Finished difference Result 29392 states and 65035 transitions. [2021-08-21 18:01:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:01:19,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:19,063 INFO L225 Difference]: With dead ends: 29392 [2021-08-21 18:01:19,064 INFO L226 Difference]: Without dead ends: 29340 [2021-08-21 18:01:19,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:01:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29340 states. [2021-08-21 18:01:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29340 to 21837. [2021-08-21 18:01:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21837 states, 21836 states have (on average 2.220141051474629) internal successors, (48479), 21836 states have internal predecessors, (48479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21837 states to 21837 states and 48479 transitions. [2021-08-21 18:01:19,496 INFO L78 Accepts]: Start accepts. Automaton has 21837 states and 48479 transitions. Word has length 41 [2021-08-21 18:01:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:19,496 INFO L470 AbstractCegarLoop]: Abstraction has 21837 states and 48479 transitions. [2021-08-21 18:01:19,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21837 states and 48479 transitions. [2021-08-21 18:01:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:19,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:19,530 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:19,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 18:01:19,732 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,SelfDestructingSolverStorable30 [2021-08-21 18:01:19,733 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash 273851601, now seen corresponding path program 26 times [2021-08-21 18:01:19,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:19,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360090694] [2021-08-21 18:01:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:19,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:19,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:19,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360090694] [2021-08-21 18:01:19,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360090694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:19,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074208750] [2021-08-21 18:01:19,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:19,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:19,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:19,829 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) [2021-08-21 18:01:19,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:01:20,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:20,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:20,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:20,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074208750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:20,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:20,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 18:01:20,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432077083] [2021-08-21 18:01:20,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:01:20,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:01:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:20,967 INFO L87 Difference]: Start difference. First operand 21837 states and 48479 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:21,295 INFO L93 Difference]: Finished difference Result 28303 states and 59779 transitions. [2021-08-21 18:01:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:01:21,296 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:21,351 INFO L225 Difference]: With dead ends: 28303 [2021-08-21 18:01:21,351 INFO L226 Difference]: Without dead ends: 26222 [2021-08-21 18:01:21,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26222 states. [2021-08-21 18:01:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26222 to 12374. [2021-08-21 18:01:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12374 states, 12373 states have (on average 2.1942132061747355) internal successors, (27149), 12373 states have internal predecessors, (27149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12374 states to 12374 states and 27149 transitions. [2021-08-21 18:01:21,603 INFO L78 Accepts]: Start accepts. Automaton has 12374 states and 27149 transitions. Word has length 41 [2021-08-21 18:01:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:21,603 INFO L470 AbstractCegarLoop]: Abstraction has 12374 states and 27149 transitions. [2021-08-21 18:01:21,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 12374 states and 27149 transitions. [2021-08-21 18:01:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:21,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:21,619 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:21,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 18:01:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:21,820 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:21,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:21,820 INFO L82 PathProgramCache]: Analyzing trace with hash 402564629, now seen corresponding path program 27 times [2021-08-21 18:01:21,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:21,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285298798] [2021-08-21 18:01:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:21,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:21,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:21,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285298798] [2021-08-21 18:01:21,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285298798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:21,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91386288] [2021-08-21 18:01:21,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:21,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:21,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:21,901 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) [2021-08-21 18:01:21,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:01:22,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:01:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:22,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:22,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:23,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91386288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:23,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:23,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 18:01:23,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257940345] [2021-08-21 18:01:23,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:01:23,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:23,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:01:23,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:01:23,124 INFO L87 Difference]: Start difference. First operand 12374 states and 27149 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:23,391 INFO L93 Difference]: Finished difference Result 25126 states and 53275 transitions. [2021-08-21 18:01:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:01:23,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:23,441 INFO L225 Difference]: With dead ends: 25126 [2021-08-21 18:01:23,441 INFO L226 Difference]: Without dead ends: 24045 [2021-08-21 18:01:23,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:01:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24045 states. [2021-08-21 18:01:23,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24045 to 16316. [2021-08-21 18:01:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16316 states, 16315 states have (on average 2.2638063132087036) internal successors, (36934), 16315 states have internal predecessors, (36934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16316 states to 16316 states and 36934 transitions. [2021-08-21 18:01:23,791 INFO L78 Accepts]: Start accepts. Automaton has 16316 states and 36934 transitions. Word has length 41 [2021-08-21 18:01:23,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:23,791 INFO L470 AbstractCegarLoop]: Abstraction has 16316 states and 36934 transitions. [2021-08-21 18:01:23,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:23,791 INFO L276 IsEmpty]: Start isEmpty. Operand 16316 states and 36934 transitions. [2021-08-21 18:01:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:23,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:23,816 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:23,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 18:01:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:24,017 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash -971677043, now seen corresponding path program 28 times [2021-08-21 18:01:24,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:24,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593955949] [2021-08-21 18:01:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:24,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:24,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:24,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593955949] [2021-08-21 18:01:24,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593955949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:24,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96317092] [2021-08-21 18:01:24,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:24,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:24,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:24,172 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) [2021-08-21 18:01:24,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:01:25,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:25,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:25,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:25,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96317092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:25,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:25,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:01:25,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273538988] [2021-08-21 18:01:25,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:01:25,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:01:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:01:25,296 INFO L87 Difference]: Start difference. First operand 16316 states and 36934 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:25,497 INFO L93 Difference]: Finished difference Result 24535 states and 53290 transitions. [2021-08-21 18:01:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:01:25,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:25,547 INFO L225 Difference]: With dead ends: 24535 [2021-08-21 18:01:25,547 INFO L226 Difference]: Without dead ends: 23074 [2021-08-21 18:01:25,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:01:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23074 states. [2021-08-21 18:01:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23074 to 19063. [2021-08-21 18:01:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19063 states, 19062 states have (on average 2.2668660161578007) internal successors, (43211), 19062 states have internal predecessors, (43211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19063 states to 19063 states and 43211 transitions. [2021-08-21 18:01:25,901 INFO L78 Accepts]: Start accepts. Automaton has 19063 states and 43211 transitions. Word has length 41 [2021-08-21 18:01:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:25,901 INFO L470 AbstractCegarLoop]: Abstraction has 19063 states and 43211 transitions. [2021-08-21 18:01:25,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 19063 states and 43211 transitions. [2021-08-21 18:01:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:25,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:25,986 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:26,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:26,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:26,186 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:26,187 INFO L82 PathProgramCache]: Analyzing trace with hash -972503599, now seen corresponding path program 29 times [2021-08-21 18:01:26,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:26,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482187449] [2021-08-21 18:01:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:26,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:26,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:26,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482187449] [2021-08-21 18:01:26,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482187449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:26,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178162224] [2021-08-21 18:01:26,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:26,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:26,299 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) [2021-08-21 18:01:26,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:01:27,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:01:27,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:27,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:27,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178162224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:27,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:27,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 18:01:27,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48702311] [2021-08-21 18:01:27,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:01:27,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:27,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:01:27,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:01:27,628 INFO L87 Difference]: Start difference. First operand 19063 states and 43211 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:28,022 INFO L93 Difference]: Finished difference Result 42984 states and 92139 transitions. [2021-08-21 18:01:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:28,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:28,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:28,122 INFO L225 Difference]: With dead ends: 42984 [2021-08-21 18:01:28,122 INFO L226 Difference]: Without dead ends: 40697 [2021-08-21 18:01:28,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:28,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40697 states. [2021-08-21 18:01:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40697 to 27982. [2021-08-21 18:01:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27982 states, 27981 states have (on average 2.327722383045638) internal successors, (65132), 27981 states have internal predecessors, (65132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27982 states to 27982 states and 65132 transitions. [2021-08-21 18:01:28,846 INFO L78 Accepts]: Start accepts. Automaton has 27982 states and 65132 transitions. Word has length 41 [2021-08-21 18:01:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:28,846 INFO L470 AbstractCegarLoop]: Abstraction has 27982 states and 65132 transitions. [2021-08-21 18:01:28,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 27982 states and 65132 transitions. [2021-08-21 18:01:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:28,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:28,901 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:28,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:29,116 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,SelfDestructingSolverStorable34 [2021-08-21 18:01:29,117 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:29,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:29,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1639160947, now seen corresponding path program 30 times [2021-08-21 18:01:29,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:29,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138779664] [2021-08-21 18:01:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:29,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:29,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:29,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138779664] [2021-08-21 18:01:29,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138779664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:29,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519369158] [2021-08-21 18:01:29,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:29,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:29,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:29,218 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) [2021-08-21 18:01:29,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:01:30,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:01:30,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:30,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:30,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519369158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:30,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:30,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 18:01:30,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241582385] [2021-08-21 18:01:30,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:01:30,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:30,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:01:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:30,409 INFO L87 Difference]: Start difference. First operand 27982 states and 65132 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:30,735 INFO L93 Difference]: Finished difference Result 33986 states and 77068 transitions. [2021-08-21 18:01:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:01:30,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:30,836 INFO L225 Difference]: With dead ends: 33986 [2021-08-21 18:01:30,837 INFO L226 Difference]: Without dead ends: 33942 [2021-08-21 18:01:30,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33942 states. [2021-08-21 18:01:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33942 to 22640. [2021-08-21 18:01:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22640 states, 22639 states have (on average 2.2451521710322893) internal successors, (50828), 22639 states have internal predecessors, (50828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22640 states to 22640 states and 50828 transitions. [2021-08-21 18:01:31,410 INFO L78 Accepts]: Start accepts. Automaton has 22640 states and 50828 transitions. Word has length 41 [2021-08-21 18:01:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:31,411 INFO L470 AbstractCegarLoop]: Abstraction has 22640 states and 50828 transitions. [2021-08-21 18:01:31,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand 22640 states and 50828 transitions. [2021-08-21 18:01:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:01:31,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:31,442 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:31,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:31,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:01:31,642 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:31,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1783604365, now seen corresponding path program 31 times [2021-08-21 18:01:31,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:31,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314927659] [2021-08-21 18:01:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:31,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:31,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:31,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314927659] [2021-08-21 18:01:31,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314927659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:31,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376962606] [2021-08-21 18:01:31,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:31,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:31,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:31,769 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) [2021-08-21 18:01:31,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:01:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:01:32,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:32,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376962606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:32,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:32,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 18:01:32,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208631972] [2021-08-21 18:01:32,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:01:32,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:01:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:32,996 INFO L87 Difference]: Start difference. First operand 22640 states and 50828 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:33,405 INFO L93 Difference]: Finished difference Result 39049 states and 81723 transitions. [2021-08-21 18:01:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:01:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:33,489 INFO L225 Difference]: With dead ends: 39049 [2021-08-21 18:01:33,489 INFO L226 Difference]: Without dead ends: 35693 [2021-08-21 18:01:33,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35693 states. [2021-08-21 18:01:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35693 to 28291. [2021-08-21 18:01:33,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28291 states, 28290 states have (on average 2.247225167903853) internal successors, (63574), 28290 states have internal predecessors, (63574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28291 states to 28291 states and 63574 transitions. [2021-08-21 18:01:34,062 INFO L78 Accepts]: Start accepts. Automaton has 28291 states and 63574 transitions. Word has length 41 [2021-08-21 18:01:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:34,062 INFO L470 AbstractCegarLoop]: Abstraction has 28291 states and 63574 transitions. [2021-08-21 18:01:34,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 28291 states and 63574 transitions. [2021-08-21 18:01:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:01:34,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:34,110 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:34,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:01:34,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:34,311 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash 964121815, now seen corresponding path program 32 times [2021-08-21 18:01:34,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:34,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250532142] [2021-08-21 18:01:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:34,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:01:34,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:34,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250532142] [2021-08-21 18:01:34,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250532142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:34,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957614972] [2021-08-21 18:01:34,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:34,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:34,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:34,361 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) [2021-08-21 18:01:34,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:01:35,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:35,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:35,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:01:35,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:01:35,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957614972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:35,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:35,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-08-21 18:01:35,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412775839] [2021-08-21 18:01:35,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:01:35,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:35,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:01:35,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:01:35,710 INFO L87 Difference]: Start difference. First operand 28291 states and 63574 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:37,242 INFO L93 Difference]: Finished difference Result 69698 states and 147687 transitions. [2021-08-21 18:01:37,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 18:01:37,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:01:37,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:37,415 INFO L225 Difference]: With dead ends: 69698 [2021-08-21 18:01:37,415 INFO L226 Difference]: Without dead ends: 69572 [2021-08-21 18:01:37,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 896.7ms TimeCoverageRelationStatistics Valid=1072, Invalid=3758, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:01:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69572 states. [2021-08-21 18:01:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69572 to 34249. [2021-08-21 18:01:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34249 states, 34248 states have (on average 2.2548177995795373) internal successors, (77223), 34248 states have internal predecessors, (77223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34249 states to 34249 states and 77223 transitions. [2021-08-21 18:01:38,509 INFO L78 Accepts]: Start accepts. Automaton has 34249 states and 77223 transitions. Word has length 43 [2021-08-21 18:01:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:38,510 INFO L470 AbstractCegarLoop]: Abstraction has 34249 states and 77223 transitions. [2021-08-21 18:01:38,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 34249 states and 77223 transitions. [2021-08-21 18:01:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:01:38,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:38,568 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:38,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 18:01:38,768 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,SelfDestructingSolverStorable37 [2021-08-21 18:01:38,768 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash -925817641, now seen corresponding path program 33 times [2021-08-21 18:01:38,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:38,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953033446] [2021-08-21 18:01:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:38,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:01:38,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:38,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953033446] [2021-08-21 18:01:38,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953033446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:38,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528729202] [2021-08-21 18:01:38,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:38,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:38,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:38,811 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) [2021-08-21 18:01:38,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:01:40,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:01:40,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:01:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:01:40,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528729202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:40,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:40,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2021-08-21 18:01:40,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614038197] [2021-08-21 18:01:40,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:01:40,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:40,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:01:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:01:40,429 INFO L87 Difference]: Start difference. First operand 34249 states and 77223 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:41,651 INFO L93 Difference]: Finished difference Result 58446 states and 128591 transitions. [2021-08-21 18:01:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 18:01:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:01:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:41,814 INFO L225 Difference]: With dead ends: 58446 [2021-08-21 18:01:41,814 INFO L226 Difference]: Without dead ends: 58092 [2021-08-21 18:01:41,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 729.5ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:01:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58092 states. [2021-08-21 18:01:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58092 to 36955. [2021-08-21 18:01:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36955 states, 36954 states have (on average 2.254722086918872) internal successors, (83321), 36954 states have internal predecessors, (83321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36955 states to 36955 states and 83321 transitions. [2021-08-21 18:01:42,834 INFO L78 Accepts]: Start accepts. Automaton has 36955 states and 83321 transitions. Word has length 43 [2021-08-21 18:01:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:42,834 INFO L470 AbstractCegarLoop]: Abstraction has 36955 states and 83321 transitions. [2021-08-21 18:01:42,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 36955 states and 83321 transitions. [2021-08-21 18:01:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:01:42,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:42,994 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:43,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 18:01:43,206 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,SelfDestructingSolverStorable38 [2021-08-21 18:01:43,207 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:43,207 INFO L82 PathProgramCache]: Analyzing trace with hash 249803735, now seen corresponding path program 34 times [2021-08-21 18:01:43,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:43,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554451811] [2021-08-21 18:01:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:43,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:01:43,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:43,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554451811] [2021-08-21 18:01:43,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554451811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:43,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209728010] [2021-08-21 18:01:43,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:43,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:43,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:43,272 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) [2021-08-21 18:01:43,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:01:44,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:44,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:44,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:01:44,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:01:44,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209728010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:44,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:44,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-21 18:01:44,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229091461] [2021-08-21 18:01:44,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:01:44,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:01:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:01:44,711 INFO L87 Difference]: Start difference. First operand 36955 states and 83321 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:45,623 INFO L93 Difference]: Finished difference Result 105234 states and 232569 transitions. [2021-08-21 18:01:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:01:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:01:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:45,969 INFO L225 Difference]: With dead ends: 105234 [2021-08-21 18:01:45,969 INFO L226 Difference]: Without dead ends: 105076 [2021-08-21 18:01:45,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:01:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105076 states. [2021-08-21 18:01:47,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105076 to 43043. [2021-08-21 18:01:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43043 states, 43042 states have (on average 2.2258956368198506) internal successors, (95807), 43042 states have internal predecessors, (95807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43043 states to 43043 states and 95807 transitions. [2021-08-21 18:01:47,482 INFO L78 Accepts]: Start accepts. Automaton has 43043 states and 95807 transitions. Word has length 43 [2021-08-21 18:01:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:47,482 INFO L470 AbstractCegarLoop]: Abstraction has 43043 states and 95807 transitions. [2021-08-21 18:01:47,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 43043 states and 95807 transitions. [2021-08-21 18:01:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:01:47,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:47,563 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:47,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 18:01:47,763 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,SelfDestructingSolverStorable39 [2021-08-21 18:01:47,763 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:47,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1489280215, now seen corresponding path program 35 times [2021-08-21 18:01:47,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:47,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913785208] [2021-08-21 18:01:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:47,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:47,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:47,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913785208] [2021-08-21 18:01:47,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913785208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:47,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757979988] [2021-08-21 18:01:47,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:47,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:47,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:48,013 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) [2021-08-21 18:01:48,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:01:49,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:01:49,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:49,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:01:49,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:49,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757979988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:49,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:49,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 18:01:49,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497963969] [2021-08-21 18:01:49,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:01:49,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:49,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:01:49,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:01:49,389 INFO L87 Difference]: Start difference. First operand 43043 states and 95807 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:49,779 INFO L93 Difference]: Finished difference Result 67559 states and 146212 transitions. [2021-08-21 18:01:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:01:49,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:01:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:49,948 INFO L225 Difference]: With dead ends: 67559 [2021-08-21 18:01:49,948 INFO L226 Difference]: Without dead ends: 67015 [2021-08-21 18:01:49,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67015 states. [2021-08-21 18:01:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67015 to 48167. [2021-08-21 18:01:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48167 states, 48166 states have (on average 2.2413943445584024) internal successors, (107959), 48166 states have internal predecessors, (107959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48167 states to 48167 states and 107959 transitions. [2021-08-21 18:01:51,288 INFO L78 Accepts]: Start accepts. Automaton has 48167 states and 107959 transitions. Word has length 43 [2021-08-21 18:01:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:51,288 INFO L470 AbstractCegarLoop]: Abstraction has 48167 states and 107959 transitions. [2021-08-21 18:01:51,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 48167 states and 107959 transitions. [2021-08-21 18:01:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:01:51,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:51,603 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:51,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:51,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:51,803 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:01:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:51,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1416960109, now seen corresponding path program 36 times [2021-08-21 18:01:51,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:51,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117727929] [2021-08-21 18:01:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:51,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:51,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:51,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117727929] [2021-08-21 18:01:51,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117727929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:51,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140971085] [2021-08-21 18:01:51,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:51,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:51,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:51,897 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) [2021-08-21 18:01:51,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:01:53,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:01:53,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:53,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:01:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:01:53,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140971085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:53,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:53,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-21 18:01:53,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425209812] [2021-08-21 18:01:53,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:01:53,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:01:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:01:53,435 INFO L87 Difference]: Start difference. First operand 48167 states and 107959 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:56,276 INFO L93 Difference]: Finished difference Result 214936 states and 485340 transitions. [2021-08-21 18:01:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:01:56,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:01:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:57,304 INFO L225 Difference]: With dead ends: 214936 [2021-08-21 18:01:57,304 INFO L226 Difference]: Without dead ends: 213914 [2021-08-21 18:01:57,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2411 ImplicationChecksByTransitivity, 1285.5ms TimeCoverageRelationStatistics Valid=1463, Invalid=5179, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 18:01:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213914 states. [2021-08-21 18:02:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213914 to 121830. [2021-08-21 18:02:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121830 states, 121829 states have (on average 2.2816406602697223) internal successors, (277970), 121829 states have internal predecessors, (277970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121830 states to 121830 states and 277970 transitions. [2021-08-21 18:02:01,396 INFO L78 Accepts]: Start accepts. Automaton has 121830 states and 277970 transitions. Word has length 43 [2021-08-21 18:02:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:01,397 INFO L470 AbstractCegarLoop]: Abstraction has 121830 states and 277970 transitions. [2021-08-21 18:02:01,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 121830 states and 277970 transitions. [2021-08-21 18:02:01,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:02:01,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:01,856 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:01,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 18:02:02,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:02,057 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:02:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash -264772205, now seen corresponding path program 37 times [2021-08-21 18:02:02,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:02,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100976016] [2021-08-21 18:02:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:02,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:02,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:02,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100976016] [2021-08-21 18:02:02,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100976016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:02,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974856988] [2021-08-21 18:02:02,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:02:02,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:02,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:02,137 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) [2021-08-21 18:02:02,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:02:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:02:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:03,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974856988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:03,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:03,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 18:02:03,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2653537] [2021-08-21 18:02:03,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:02:03,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:03,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:02:03,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:02:03,609 INFO L87 Difference]: Start difference. First operand 121830 states and 277970 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:05,983 INFO L93 Difference]: Finished difference Result 253713 states and 576333 transitions. [2021-08-21 18:02:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:02:05,983 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:02:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:07,206 INFO L225 Difference]: With dead ends: 253713 [2021-08-21 18:02:07,206 INFO L226 Difference]: Without dead ends: 253569 [2021-08-21 18:02:07,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=881, Invalid=2541, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:02:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253569 states. [2021-08-21 18:02:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253569 to 201313. [2021-08-21 18:02:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201313 states, 201312 states have (on average 2.303066881258941) internal successors, (463635), 201312 states have internal predecessors, (463635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201313 states to 201313 states and 463635 transitions. [2021-08-21 18:02:13,736 INFO L78 Accepts]: Start accepts. Automaton has 201313 states and 463635 transitions. Word has length 43 [2021-08-21 18:02:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:13,736 INFO L470 AbstractCegarLoop]: Abstraction has 201313 states and 463635 transitions. [2021-08-21 18:02:13,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 201313 states and 463635 transitions. [2021-08-21 18:02:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:02:14,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:14,412 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:14,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 18:02:14,612 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,SelfDestructingSolverStorable42 [2021-08-21 18:02:14,612 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:02:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1736521107, now seen corresponding path program 38 times [2021-08-21 18:02:14,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:14,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320636351] [2021-08-21 18:02:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:14,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:02:14,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:14,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320636351] [2021-08-21 18:02:14,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320636351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:14,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788205719] [2021-08-21 18:02:14,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:02:14,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:14,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:14,678 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) [2021-08-21 18:02:14,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:02:15,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:02:15,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:02:15,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:16,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788205719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:16,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:16,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 18:02:16,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755317094] [2021-08-21 18:02:16,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:02:16,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:02:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:02:16,230 INFO L87 Difference]: Start difference. First operand 201313 states and 463635 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:18,292 INFO L93 Difference]: Finished difference Result 243441 states and 547853 transitions. [2021-08-21 18:02:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:02:18,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:02:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:19,404 INFO L225 Difference]: With dead ends: 243441 [2021-08-21 18:02:19,404 INFO L226 Difference]: Without dead ends: 243177 [2021-08-21 18:02:19,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 506.4ms TimeCoverageRelationStatistics Valid=488, Invalid=1582, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:02:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243177 states. [2021-08-21 18:02:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243177 to 201611. [2021-08-21 18:02:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201611 states, 201610 states have (on average 2.302108030355637) internal successors, (464128), 201610 states have internal predecessors, (464128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201611 states to 201611 states and 464128 transitions. [2021-08-21 18:02:25,441 INFO L78 Accepts]: Start accepts. Automaton has 201611 states and 464128 transitions. Word has length 43 [2021-08-21 18:02:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:25,441 INFO L470 AbstractCegarLoop]: Abstraction has 201611 states and 464128 transitions. [2021-08-21 18:02:25,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 201611 states and 464128 transitions. [2021-08-21 18:02:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:02:26,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:26,108 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:26,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:26,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 18:02:26,319 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:02:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:26,319 INFO L82 PathProgramCache]: Analyzing trace with hash -169220905, now seen corresponding path program 39 times [2021-08-21 18:02:26,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:26,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893797251] [2021-08-21 18:02:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:26,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:02:26,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:26,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893797251] [2021-08-21 18:02:26,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893797251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:26,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830225921] [2021-08-21 18:02:26,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:02:26,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:26,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:26,395 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) [2021-08-21 18:02:26,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:02:27,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:02:27,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:02:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:27,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830225921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:27,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:27,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-21 18:02:27,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118916871] [2021-08-21 18:02:27,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:02:27,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:27,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:02:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:02:27,939 INFO L87 Difference]: Start difference. First operand 201611 states and 464128 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:29,977 INFO L93 Difference]: Finished difference Result 243591 states and 547972 transitions. [2021-08-21 18:02:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:02:29,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:02:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:30,857 INFO L225 Difference]: With dead ends: 243591 [2021-08-21 18:02:30,857 INFO L226 Difference]: Without dead ends: 243231 [2021-08-21 18:02:30,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:02:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243231 states. [2021-08-21 18:02:35,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243231 to 216233. [2021-08-21 18:02:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216233 states, 216232 states have (on average 2.307886899256354) internal successors, (499039), 216232 states have internal predecessors, (499039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216233 states to 216233 states and 499039 transitions. [2021-08-21 18:02:37,110 INFO L78 Accepts]: Start accepts. Automaton has 216233 states and 499039 transitions. Word has length 43 [2021-08-21 18:02:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:37,110 INFO L470 AbstractCegarLoop]: Abstraction has 216233 states and 499039 transitions. [2021-08-21 18:02:37,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 216233 states and 499039 transitions. [2021-08-21 18:02:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:02:37,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:37,457 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:37,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 18:02:37,657 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,SelfDestructingSolverStorable44 [2021-08-21 18:02:37,657 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:02:37,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash 607433619, now seen corresponding path program 40 times [2021-08-21 18:02:37,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:37,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694526209] [2021-08-21 18:02:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:37,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:37,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:37,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694526209] [2021-08-21 18:02:37,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694526209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:37,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260306778] [2021-08-21 18:02:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:02:37,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:37,734 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) [2021-08-21 18:02:38,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:02:39,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:02:39,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:39,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:02:39,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:39,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260306778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:39,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:39,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-08-21 18:02:39,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693601436] [2021-08-21 18:02:39,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:02:39,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:39,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:02:39,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:02:39,515 INFO L87 Difference]: Start difference. First operand 216233 states and 499039 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:41,910 INFO L93 Difference]: Finished difference Result 352431 states and 803525 transitions. [2021-08-21 18:02:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:02:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:02:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:43,579 INFO L225 Difference]: With dead ends: 352431 [2021-08-21 18:02:43,579 INFO L226 Difference]: Without dead ends: 352169 [2021-08-21 18:02:43,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=367, Invalid=1355, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:02:44,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352169 states. [2021-08-21 18:02:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352169 to 325499. [2021-08-21 18:02:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325499 states, 325498 states have (on average 2.3164904239042943) internal successors, (754013), 325498 states have internal predecessors, (754013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325499 states to 325499 states and 754013 transitions. [2021-08-21 18:02:53,311 INFO L78 Accepts]: Start accepts. Automaton has 325499 states and 754013 transitions. Word has length 43 [2021-08-21 18:02:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:53,311 INFO L470 AbstractCegarLoop]: Abstraction has 325499 states and 754013 transitions. [2021-08-21 18:02:53,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 325499 states and 754013 transitions. [2021-08-21 18:02:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 18:02:54,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:54,319 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:54,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:54,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 18:02:54,520 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:02:54,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:54,520 INFO L82 PathProgramCache]: Analyzing trace with hash -230671975, now seen corresponding path program 41 times [2021-08-21 18:02:54,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:54,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611438971] [2021-08-21 18:02:54,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:54,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:02:54,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:54,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611438971] [2021-08-21 18:02:54,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611438971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:54,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702179569] [2021-08-21 18:02:54,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:02:54,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:54,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:54,562 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) [2021-08-21 18:02:54,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:02:55,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:02:55,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:55,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:02:55,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:02:56,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702179569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:56,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:56,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-21 18:02:56,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338647034] [2021-08-21 18:02:56,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:02:56,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:02:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:02:56,177 INFO L87 Difference]: Start difference. First operand 325499 states and 754013 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:59,998 INFO L93 Difference]: Finished difference Result 550246 states and 1243200 transitions. [2021-08-21 18:02:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:02:59,998 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 18:02:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:02,542 INFO L225 Difference]: With dead ends: 550246 [2021-08-21 18:03:02,543 INFO L226 Difference]: Without dead ends: 550216 [2021-08-21 18:03:02,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=394, Invalid=728, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:03:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550216 states. [2021-08-21 18:03:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550216 to 396019. [2021-08-21 18:03:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396019 states, 396018 states have (on average 2.268028220939452) internal successors, (898180), 396018 states have internal predecessors, (898180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396019 states to 396019 states and 898180 transitions. [2021-08-21 18:03:19,061 INFO L78 Accepts]: Start accepts. Automaton has 396019 states and 898180 transitions. Word has length 45 [2021-08-21 18:03:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:19,062 INFO L470 AbstractCegarLoop]: Abstraction has 396019 states and 898180 transitions. [2021-08-21 18:03:19,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 396019 states and 898180 transitions. [2021-08-21 18:03:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 18:03:19,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:19,827 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:19,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:20,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:20,027 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:03:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:20,028 INFO L82 PathProgramCache]: Analyzing trace with hash 890146327, now seen corresponding path program 42 times [2021-08-21 18:03:20,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:20,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846274508] [2021-08-21 18:03:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:20,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-21 18:03:20,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:20,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846274508] [2021-08-21 18:03:20,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846274508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:20,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377182392] [2021-08-21 18:03:20,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:03:20,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:20,361 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) [2021-08-21 18:03:20,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:03:21,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:03:21,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:03:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:03:21,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377182392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:21,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:21,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-21 18:03:21,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868190077] [2021-08-21 18:03:21,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:03:21,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:03:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:03:21,988 INFO L87 Difference]: Start difference. First operand 396019 states and 898180 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:30,372 INFO L93 Difference]: Finished difference Result 1013559 states and 2262880 transitions. [2021-08-21 18:03:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:03:30,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 18:03:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:36,169 INFO L225 Difference]: With dead ends: 1013559 [2021-08-21 18:03:36,169 INFO L226 Difference]: Without dead ends: 1013401 [2021-08-21 18:03:36,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1035.5ms TimeCoverageRelationStatistics Valid=1264, Invalid=3292, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 18:03:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013401 states. [2021-08-21 18:04:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013401 to 708038. [2021-08-21 18:04:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708038 states, 708037 states have (on average 2.3975795050258673) internal successors, (1697575), 708037 states have internal predecessors, (1697575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708038 states to 708038 states and 1697575 transitions. [2021-08-21 18:04:11,709 INFO L78 Accepts]: Start accepts. Automaton has 708038 states and 1697575 transitions. Word has length 47 [2021-08-21 18:04:11,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:11,709 INFO L470 AbstractCegarLoop]: Abstraction has 708038 states and 1697575 transitions. [2021-08-21 18:04:11,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 708038 states and 1697575 transitions. [2021-08-21 18:04:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:04:14,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:14,501 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:14,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:14,716 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,SelfDestructingSolverStorable47 [2021-08-21 18:04:14,717 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:04:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash 373411101, now seen corresponding path program 43 times [2021-08-21 18:04:14,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:14,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970786983] [2021-08-21 18:04:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:14,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-21 18:04:14,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:14,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970786983] [2021-08-21 18:04:14,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970786983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:14,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194093238] [2021-08-21 18:04:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:04:14,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:14,865 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) [2021-08-21 18:04:14,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:04:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:04:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-21 18:04:16,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194093238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:16,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:16,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 18:04:16,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394374876] [2021-08-21 18:04:16,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:04:16,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:16,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:04:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:04:16,984 INFO L87 Difference]: Start difference. First operand 708038 states and 1697575 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)